Re: [Elecraft] Time Syncronization

[David Anderson via Elecraft]

Lynn,

For Modes like MSK144 FT8 JT65 you need to be much closer than that! 

Better than plus or minus 1 second is required.


73 from David GM4JJJ

> On 13 Sep 2017, at 18:22, Lynn W. Taylor, WB6UUT 
>  wrote:
> 
> For what it's worth, plus or minus 30 seconds isn't all that big a deal.
> 
> 


.
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Re: [Elecraft] Time Syncronization

[David Anderson via Elecraft]

+1

73 from David GM4JJJ

> On 13 Sep 2017, at 14:33, M. George  wrote:
> 
> I use the free Meinberg NTP build on Windows 10.
> 
> https://www.meinbergglobal.com/english/sw/ntp.htm
> 
> 

.
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Re: [Elecraft] Unsubscribing

[David Anderson via Elecraft]

David,

To me it is one of the charms of this list, that we get to read what is 
happening in the US of A over here. I can skip anything that doesn't interest 
me, as all my Elecraft stuff is auto filtered into a folder on my phone, 
tablet, Mac. 

I for one enjoy reading about things that I know I can never do , travel or 
hike across wilderness, own a huge RV or truck and kit it out with radio gear. 
See the total eclipse, tried that once in England,  I can confirm it gets very 
dark, but that it also gets very very wet.


73 from David GM4JJJ

> On 20 Aug 2017, at 16:31, David Pratt  wrote:
> 
> Regrettably, after 17 years as a member of this group I am now
> unsubscribing as nowadays there are so few messages of relevance to
> those of us in the UK and the developed world.
> 
> Any queries I have on Elecraft products will be made by direct mail to
> Eric, Wayne, Don and to Elecraft support.
> 
> 73 to all
> 
> David G4DMP
> 
> -- 
> + - - - - - - - - - - - - - - - - +
> | David M Pratt, Kippax, Leeds.   |
> | Website: http://www.g4dmp.co.uk |
> + - - - - - - - - - - - - - - - - +
> 
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Re: [Elecraft] Elecraft -I have unsubscribed

[David Anderson via Elecraft]

Phil,

I setup filtering on Yahoo for the Elecraft list and then can read it whenever 
I have time on my iPhone or iPad, it works perfectly.

73 from David GM4JJJ

> On 19 Aug 2017, at 18:36, Philip Anderson  wrote:
> 
> After being overwhelmed with the number of emails (ironically most recently, 
> on the topic of changing the list to make it more manageable) I have 
> unsubscribed from this list.
> 
> I will re-subscribe if Elecraft change the system so that I'm no longer 
> inundated with emails that are off-topic regarding my specific interest in 
> Elecraft products.
> 
> I suggest at very least splitting the list into a low volume (Elecraft 
> support questions ONLY) and a high volume chit-chat list for Elecraft fans so 
> that those only interest in messages directly related to their Elecraft 
> product can avoid all the irrelevant chit-chat.
> 
> In answer to the people who tell me that I just need to manage the list 
> properly using filters, folders and threading on my email client - I already 
> do that on my home computer, but try doing all of that on an iPhone email 
> client.
> 
> Also, try picking up that 1 essential business email over a really slow 
> cellular connection when your phone is determined to download 1,000's of 
> irrelevant chatter and arguments from this list before it lets you download 
> the essential email.
> 
> Thanks for the help I received earlier in the week with my actual KX3 related 
> question :-)
> 
> 73
> 
> phil G4PWO
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Re: [Elecraft] K3: Odd ALC behavior

[David Anderson via Elecraft]

I was thinking that as the "ALC" meter isn't really showing ALC, but audio 
level when below I believe 5 bars? - that the ALC isn't being modulated, rather 
what we may be seeing is an artefact caused by the way the peak level of the 
audio is detected by sampling the audio at a particular sampling rate.  

Because it isn't just a simple hardware analog peak detector that is used, the 
audio meter reading displayed will beat between the sampling rate of the audio 
detector and the actual frequency of the tone, even an absolutely pure tone 
with no harmonics. 

I have seen similar odd things happen with another make of radio with their 
power meter (which again is sampled) and AM modulation on the transmission. 
Putting a true analog power meter on the output showed no variation in power 
output, it was all an illusion.

It's just one of those annoying things that happen when we aren't dealing with 
purely analog methods of detection of frequencies. You see similar aliases when 
using modern Digital Sampling Oscilloscopes.

As you have pointed out the solution can only involve moving the software's 
tune frequency to a frequency that does not beat at such a visibly slow rate 
with the audio detector sampling rate. 

73 from David GM4JJJ

> On 5 Aug 2017, at 00:45, Wayne Burdick  wrote:
> 
> Is it possible that a beat note between tones (and their harmonics) is what’s 
> modulating the ALC reading? If so, moving the tone slightly off the standard 
> pitch may be an acceptable workaround.
> 
> Wayne
> N6KR
> 
> 
>> On Aug 4, 2017, at 1:42 PM, Wes Stewart  wrote:
>> 
>> Good find Brian!!! I see it too in FT8.
>> 
>> This probably explains the great variability in results reported. Some of us 
>> have a problem, others say, Huh, what the heck are you talking about?
>> 
>> Wes, N7WS
>> 
>> 
>>> On 8/4/2017 11:33 AM, Brian Hunt wrote:
>>> Here's some followup:
>>> FLDIGI shows the "pumping" affect with carrier tones of 500, 1000, 1500, 
>>> and 2000 Hz.
>>> WSJT-X 1.8 shows the "pumping" affect with carrier tones of 1000, 1500 and 
>>> 2000 Hz (couldn't select 500 Hz).
>>> 
>>> The affect is very narrow with frequency.  10 Hz either way and the output 
>>> and ALC display and MON output is rock solid.  Changing the K3 filter 
>>> center frequency has no effect on the above.
>>> 
>>> 73,
>>> Brian, K0DTJ
>>> 
 On 8/4/2017 10:58, Brian Hunt wrote:
 I spent some quality time with my K3, FLDIGI and an oscilloscope today.  I 
 had the same problem as described.  Looking at my USB soundcard output to 
 the K3, the amplitude of the audio from FLDIGI in TUNE mode was rock 
 solid. Looking at the MON output from the K3, the level oscillated in time 
 with the ALC "pumping" at about 2.4 Hz (timed with a stop watch).  At the 
 same time the K3 power output into a dummy load was rock solid at a 
 selected 10 watts.
 
 Then I changed the carrier frequency in FLDIGI slightly off 1500 Hz and 
 the "pumping" went away!  At 1515 Hz I could easily set the ALC to the 
 desired 4 bars solid, 5th flickering.  Then I remembered (and verified) 
 that the default filter center in DATA A mode is 1500 Hz. I changed the 
 filter center frequency to 1450 Hz and moved the FLDIGI frequency around 
 but couldn't reproduce the "pumping".
 
 I plan to repeat the same tests with WSJT-X 1.8 but wanted to get this out 
 to the group.
 
 73,
 Brian, K0DTJ
 
>>> 
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>> 
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Re: [Elecraft] PX3 Signal While Transmitting

[David Anderson via Elecraft]

Try the internal keyer, just as a test, I think I recall that then the PX3 may 
freeze totally during semi break in keying. (I never used full break in because 
I was using transverters with sequenced relays).

I recall being confused as to what was different one day when I saw what you 
are seeing and it was because I had changed from external to internal keyer or 
vice versa.

73 from David GM4JJJ

> On 3 Aug 2017, at 17:54, Roger Meadows <ae...@ae4rm.com> wrote:
> 
> Noise blankers are off and it is an external key. 
>> On Thu, Aug 3, 2017 at 12:46 PM David Anderson <gm4...@yahoo.co.uk> wrote:
>> I don't have my PX3 beside me now, but I recall that the PX3 acts 
>> differently between using an external keyer and the internal keyer of the 
>> KX3, one freezes the PX3 all the time you are transmitting in semi break in, 
>> the other doesn't.
>> 
>> The other thing that sometimes causes spurious signals to appear on the PX3 
>> is if the PX3 NB level is too high (not the KX3 NB level).
>> 
>> 73 from David GM4JJJ
>> 
>> > On 3 Aug 2017, at 16:53, Roger Meadows <ae...@ae4rm.com> wrote:
>> >
>> > When I'm sending code, I noticed that there is a signal showing up just to
>> > the right of the frequency I'm on. It goes away when I'm done
>> > transmitting.  Here is an example ...  https://youtu.be/zQ_VWCmKvOw
>> >
>> > Thanks for your input.
>> >
>> > 73,
>> > Roger Meadows
>> > AE4RM
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Re: [Elecraft] PX3 Signal While Transmitting

[David Anderson via Elecraft]

I don't have my PX3 beside me now, but I recall that the PX3 acts differently 
between using an external keyer and the internal keyer of the KX3, one freezes 
the PX3 all the time you are transmitting in semi break in, the other doesn't. 

The other thing that sometimes causes spurious signals to appear on the PX3 is 
if the PX3 NB level is too high (not the KX3 NB level).

73 from David GM4JJJ

> On 3 Aug 2017, at 16:53, Roger Meadows  wrote:
> 
> When I'm sending code, I noticed that there is a signal showing up just to
> the right of the frequency I'm on. It goes away when I'm done
> transmitting.  Here is an example ...  https://youtu.be/zQ_VWCmKvOw
> 
> Thanks for your input.
> 
> 73,
> Roger Meadows
> AE4RM
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Re: [Elecraft] How to keep track of grid squares logged?

[David Anderson via Elecraft]

I was going to suggest VQLOG by Gabriel EA6VQ, the same ham that produces the 
wonderful DXMaps spotting website.  

https://www.dxmaps.com/spots/mapg.php

https://www.dxmaps.com/vqlog.html

I have used VQLOG for all my VHF and UHF contacts and it makes keeping track of 
countries, grid squares, awards and so on very easy.   

If you are more than just a casual VHF guy then having a logging program like 
this is needed.

73 from David GM4JJJ

> On 30 Jul 2017, at 22:37, Wayne Burdick  wrote:
> 
> This is just what I was looking for, Frank. 
> 
> Thanks, everyone, for all the other suggestions as well.
> 
> 73,
> Wayne
> N6KR
> 
> 
>> On Jul 30, 2017, at 12:59 PM, Frank Westphal  wrote:
>> 
>> Wayne,
>> 
>> Link to FFMA Grid Tracker spreadsheet developed by NZ3M.
>> 
>> http://www.nz3m.com/FFMA.html
>> 
>> Frank
>> 
>> Message: 16
>> Date: Sun, 30 Jul 2017 11:12:28 -0700
>> From: Wayne Burdick
>> To: Elecraft Reflector
>> Subject: [Elecraft] How to keep track of grid squares logged?
>> Message-ID:<6417183d-ed00-4d7b-9751-60bc73cf5...@elecraft.com>
>> Content-Type: text/plain; charset=utf-8
>> 
>> Hi all,
>> 
>> On 6 m, everyone uses grid squares when reporting their QTH. Is there a web 
>> tool or spreadsheet available somewhere that allows you to conveniently keep 
>> track of which ones you?ve worked?
>> 
>> Thanks,
>> Wayne
>> N6KR
> 
> 
> 
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Re: [Elecraft] PX3 Problem?

[David Anderson via Elecraft]

This comes up quite often, and here is a reply from Wayne about it. You can 
check your PX3 as follows.

> Are you using a PX3 or P3? Assuming it's a PX3, try this:
> 
> - make sure RX I/Q is set to ON (KX3 menu)
> - make sure the PX3->KX3 cables are fully seated
> - connect an antenna to the KX3
> - switch to 20 meters
> - turn the preamp ON and set the PREAMP menu entry on the KX3 to 20 dB
> - set the PX3's SPAN to 50 kHz or lower
> - adjust the REF level so the "grass" (noise floor) is close to the bottom of 
> the spectralplot
> 
> With the above setup, there will typically be no visible fixed spectral lines 
> on the PX3.
> 
> As described in the PX3 FAQ on our web site, very wide SPAN settings and low 
> front-end gain (e.g., turning off the preamp) will reduce the signal-to-noise 
> ratio of an RX I/Q-based pandapter, including making wideband spurs more 
> apparent. The same limitations apply when using the KX3 (or other quadrature 
> downconversion radio) with a PC sound card. Typically this doesn't impact 
> usability, e.g. locating signals of interest. In fact most sound cards are 
> limited to displaying about 48 kHz of spectrum, while the PX3 can go wider 
> thanks to its high-performance/high-speed A-to-D converter.

73 from David GM4JJJ

> On 16 Jul 2017, at 23:47, Dave Sublette  wrote:
> 
> Tnx Roger and Matt.  Roger — I don’t have the KX3/PX3 interfaced with the 
> audio on the computer.  I do have the usb port connected.
> 
> Matt — I believe it is the 2.5 mm jacks that carry the Rx I/Q between the KX3 
> and PX3.  I unplugged the antenna and the spikes are still there.  I 
> unplugged the Rx I/Q plug from the PX3 and the irregularly space spikes went 
> away and the regularly spaced spikes were still there at the same levels as 
> when the cable was plugged in.
> 
> I’m still thinking there is a failure in the PX3.
> 
> Dave
>> On Jul 16, 2017, at 6:06 PM, Dave Sublette  wrote:
>> 
>> I have had my PX3 for a little over a year (I think).  It has been used 
>> sparingly.  Until this afternoon, it has worked perfectly.  Now I see a 
>> spike in the center of the display and periodic spikes across the entire 
>> screen. Almost all are symmetrical in frequency and amplitude about the 
>> center line. There are some that are not symmetrical.  I have plugged and 
>> unplugged all the cables, taking care to see that each is fully into the 
>> socket.
>> 
>> So, perhaps I have a failure that requires returning to Elecraft?  Have any 
>> of you had the same experience?
>> 
>> 73,
>> 
>> Dave, K4TO
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Re: [Elecraft] PX3 Problem?

[David Anderson via Elecraft]

One other thing, have you perhaps got the PX3 Noise Blanker switched on and the 
PX3 NB level turned up high? That causes spikes at the centre.  (I am not 
referring to the KX3 noise blanker) 

73 from David GM4JJJ

> On 16 Jul 2017, at 23:06, Dave Sublette  wrote:
> 
> I have had my PX3 for a little over a year (I think).  It has been used 
> sparingly.  Until this afternoon, it has worked perfectly.  Now I see a spike 
> in the center of the display and periodic spikes across the entire screen. 
> Almost all are symmetrical in frequency and amplitude about the center line. 
> There are some that are not symmetrical.  I have plugged and unplugged all 
> the cables, taking care to see that each is fully into the socket.
> 
> So, perhaps I have a failure that requires returning to Elecraft?  Have any 
> of you had the same experience?
> 
> 73,
> 
> Dave, K4TO
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Re: [Elecraft] Fldigi and signallink question interfaced to KX3

[David Anderson via Elecraft]

This is a repeat of an email that I sent to Terry and the list, and which 
didn't make it to the list last week, so am trying again after some changes 
have made by the powers that be. 

Terry,

It appears that Fldigi uses audio keying rather than real CW. So you will use 
the same setup that you have for other Digital modes within Fldigi and your 
Signalink.

Details are at:

http://www.w1hkj.com/FldigiHelp-3.21/html/cw_configuration_page.html

73 from David GM4JJJ

> On 30 Jun 2017, at 04:26, Terry Brown  wrote:
> 
> I have a KX3 connected to a Signalink and Fldigi.  It seems to work fine for
> all the digital modes.  I can use it to decode CW, but have never sent CW.
> I clicked on the CQ button and all that happened was that my transmitter
> went into transmit mode, but nothing was transmitted.  If I  put the KX3 in
> LSB it would transmit cw fine, but was always off frequency by the amount of
> my sidetone.  
> 
> 
> 
> Will fldigi send CW correctly in cw mode on the KX3?  If so, what am I doing
> wrong.
> 
> 
> 
> Thanks,
> 
> 
> 
> Terry
> 
> 
> 
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[Elecraft] Problem with list sever

[David Anderson via Elecraft]

I keep getting this when sending to the list

Sorry, we were unable to deliver your message to the following address.

:
Remote host said:
550 Message contained unsafe content 
(Heuristics.Safebrowsing.Suspected-phishing_safebrowsing.clamav.net)
[BODY]


73 from David GM4JJJ
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Re: [Elecraft] 6 meters is open

[David Anderson via Elecraft]

Don't say that Bill, hi.

73 from David GM4JJJ

> On 6 Jun 2017, at 21:08, Bill Johnson <k9...@live.com> wrote:
> 
> For some of us, that might not be too far away.  :-)
> 
> 73,
> Bill
> K9YEQ
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne Burdick
> Sent: Tuesday, June 6, 2017 9:44 AM
> To: David Anderson <gm4...@yahoo.co.uk>
> Cc: Elecraft Reflector <elecraft@mailman.qth.net>
> Subject: Re: [Elecraft] 6 meters is open
> 
> Thanks for the info, David. 
> 
> Unfortunately I think a lot of 6-m ops will have to go SK before they give up 
> using 50.125 MHz as a calling frequency :)
> 
> 73,
> Wayne
> N6KR
> 
> 
>> On Jun 6, 2017, at 5:52 AM, David Anderson <gm4...@yahoo.co.uk> wrote:
>> 
>> Hi folks,
>> 
>> Glad to see the interest in 6m, it is an amazing band when it opens even 
>> outside sunspot maximum.  Multihop Sporadic E can give DX right across the 
>> Atlantic and beyond.
> 
> 
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Re: [Elecraft] 6 meters is open

[David Anderson via Elecraft]

Hi folks,

Glad to see the interest in 6m, it is an amazing band when it opens even 
outside sunspot maximum.  Multihop Sporadic E can give DX right across the 
Atlantic and beyond.

There is a "DX Window" between 50.100 and 50.125 MHz. (see ARRL Bandplan)  That 
means it is reserved by mutual agreements for intercontinental DX contacts. You 
might not hear anything there and think it is clear, but there are many 
worldwide DX stations monitoring that quiet window for other fleeting weak DX 
stations half way around the world and that can be spoilt by local stations 
using it. 

The ARRL bandplan mentions 50.100 to 125 for the DX window but there is a move 
to try and extend it to 130 and move Domestic SSB contacts to 200.

Some helpful advice at 

http://www.qsl.net/n1irz/sixmeter.html


The JT65 community are using 5O.276 and it is very crowded during openings as 
well as very S L O W. So when signals are strong enough it is usually much 
faster to shift to CW or SSB.

Also meteor scatter takes place using MSK144 with 15 sec periods on 50.280 at 
any time, inside and outside of meteor showers.

With all of the new digital modes there are constant changes to operating modes 
and frequencies and some attempts at getting consensus on faster modes like 
JT9H FAST to suit transatlantic multihop Es better.

See bottom of page at

https://www.qrz.com/db/VE1SKY

As with any band that you are new to, or haven't used for a while, it is a good 
idea to do a bit of reading about operating frequencies, i.e. Bandplans and 
listen first to find out what the protocols are before transmitting. 

I had a ball on Sunday working CW across to the east coast USA and heard the 
left coast on JT65 and Japan in the morning a couple of days earlier.

See you on the magic band! - 6m


73 from David GM4JJJ

> On 5 Jun 2017, at 20:41, Wayne Burdick  wrote:
> 
> Hi Tom,
> 
> USB, typically at 50.125-50.135, or CW around 50.090-50.100. 
> 
> This time of year there are frequent openings due to various propagation 
> modes. I just park the radio at 50.125, squelched. Occasionally you'll hear 
> someone pop up. 
> 
> Wayne 
> 
> 
> 
>> On Jun 5, 2017, at 12:19 PM, Tom  wrote:
>> 
>> Hi,
>> Nothing up here in Montreal...but I've never been on 6m.  Is this USB?  FM?
>> Tom
> 
> 
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Re: [Elecraft] KX2 Heatsink

[David Anderson via Elecraft]

Thank you Howie!

I was also banned from that group in 2014 for reasons that were never clear to 
me, and I did not get any reply from the owner when I asked what I had done 
wrong. At the time I was extremely upset as I had never been banned from 
anything before in my life.

I did hear some very enlightening information from one of the other vendors of 
KX3 heatsink products about the dark things going on under the previous group 
owner. I decided then not to participate further in that group, though I 
managed to resubscribe under another email address just so that I could access 
archives of useful material in the group.

It is good to know that you have taken over the group.

73 from David GM4JJJ

> On 15 May 2017, at 22:51, Howard Hoyt  wrote:
> 
> Leroy, everyone else reading the misinformation posted by Tex KA5Y:
> 
> Please do not make a decision on faulty information.  I was the one who came 
> along AFTER the original list owner who banned many people including me, and 
> I fixed the idiotic policies which kept people from talking about 
> manufacturers the owner didn't like.  I was one of those people who was 
> banned!  Please check your information before agreeing with someone who 
> speaks without getting his facts straight.  Since I have been moderating the 
> Yahoo KX User Group I have not banned ANYONE for reasons other than posting 
> porn or Viagra ads, and those are usually hijacked email accounts.  If you 
> need independent verification of this set of facts, please contact these 
> vendors who were banned like me, but who can now post whatever they want 
> thanks to me taking the group over and changing the policy, they know the 
> real story of what happened in that group, not Tex:
> 
> QRPworks - Steve Silverman - kb3...@qrpworks.com
> GEMS Products - Scott Bastian - kd6...@sbcglobal.net
> Rose's Cases - Ken Kopp - kengk...@gmail.com
> 
> This is one of the problems with the internet: people can just say whatever 
> they want without checking facts, and some people just believe what they read 
> uncritically.
> 
> Howie - WA4PSC
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Re: [Elecraft] GPS Disciplined 10MHZ source from China

[David Anderson via Elecraft]

The advantage of the Leo Bodnar unit is that it can do a lot more than just act 
as a fixed 10 MHz reference. It covers the range 450 Hz to 800 MHz, so has many 
other uses around the shack. 
I use mine for frequency locking the 116 MHz Local oscillator of an a G4DDK 
Anglian 144 MHz transverter. 

If it is just a 10 MHz reference that is required then other units with better 
phase noise are available surplus, though be careful as some may require a bit 
of work if they are very old, however the Chinese do make some very nice 10 MHz 
GPSDO's which are reasonably priced. I have one and a matching 8 output 
distribution amplifier which also contains a fallback OCXO within it. I also 
have a surplus HP Z3801A, it is large, requires a 48V DC power supply, I use it 
as my main 10 MHz shack and lab reference for microwave counters. 

The Leo Bodnar can be switched on and is locked and stable in about a minute 
from cold, unlike high accuracy GPSDOs with OCXOs which can take 15 to 30 
minutes to reach lock and really are designed to be left switched on and 
consuming power all the time, so that may be a consideration in a ham station 
that is not always attended and you want to power everything down for safety or 
to save electricity.

Lastly if you want a very nice shack GPS time clock. I recently found this USA 
kit on Tindie.

https://www.tindie.com/products/nsayer/gps-clock/

It is a digital LED clock which is GPS locked. Note it isn't a frequency 
reference, only a timepiece.
It can display hours minute and seconds plus optionally tenths of a second.

All on one PCB and runs from 5V DC at about 200mA max. I built one and am most 
impressed. You can have it show local time with auto DST correction, 12 or 24 
hour format, or leave it on UTC for the shack. I have not noticed any RFI from 
it, even in its wooden enclosure.

It does require a GPS Lock to work, so if you live in a basement, unless you 
mount an antenna outside it won't work. From a cold start it takes about a 
couple of minutes to lock, sometimes less. I leave mine on as the power 
consumption is relatively low.

I have no connection with the designer, other than as a customer.


73 from David GM4JJJ

On 9 May 2017, at 15:19, Paul Christensen  wrote:

>> "If you want a good quality 10 MHz GPSDO, I recommend the one made by Leo
> Bodnar M0XER. It was reviewed in QST, June 2016."
> 
> Unless the K3S architecture is different than the K3, then frequency, rather
> than phase-locking is used from the external frequency source.  Phase noise
> performance of the GPS-DO doesn't impact performance of the K3 receiver.
> 
> However, if planning on distributing the GPS-DO to other devices, I think
> it's worthwhile to note that the higher-priced version of the Bodnar is
> still > 30 dB worse at a 100 Hz Fc offset than a common Trimble Thunderbolt
> with the Trimble-branded OCXO (not Piezo) when powered from a low-noise,
> lab-grade supply.  For example, typical Trimble PN at 100 Hz is -160 dBc.
> The upper-grade Bodnar unit is about -125 dBc.  
> 
> Compared to what's available on the new and used markets, I agree with G4DYA
> that the Bodnar's performance is probably characterized as good, but not
> excellent.  Again, for K3 users it isn't an issue, but if the device is
> driving other test gear or other transceivers, that 30 dB difference may
> mean a lot.  
> 
> The Thunderbolts were once plentiful on eBay for USD $99.  Scarcity has
> driven that up but with persistence, a watchful eye can still spot one at a
> reasonable price.   
> 
> I ended up installing a Trimble unit and Lambda linear supply into a
> customized enclosure.  It drives a TAPR distribution amp and that supplies a
> precision 10 MHz refence to multiple transceivers and test equipment.  
> 
> http://tinyurl.com/j7r36w5
> 
> Paul, W9AC
> 
> 
> 
> 
> 
> 
> 
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Re: [Elecraft] OT: Looking for Oregon/Idaho Eclipse accommodation

[David Anderson via Elecraft]

Wayne

I went from Scotland down to Cornwall for the total eclipse of the sun in 1999, 
the only chance in my lifetime to see a total eclipse in the U.K., we were 
fortunate in not having to pay to stay in a hotel, as we travelled down by 
overnight train from Scotland on a special old train run by the steam 
preservation society, arriving at Penzance just before dawn, seeing the sun 
rising before it went behind a band of cloud.

Unfortunately the weather did not oblige and the sun was totally eclipsed by 
that cloud as well as the moon. :-(  However it was still an impressive sight, 
getting dark in the middle of the day, with an eerie silence and a chill in the 
air, the birds went quiet and then started to make a noise again as totality 
passed and the light started to rush across the sea to us. It was also 
spectacular to see 100's of flashes from cameras going off all along the 
headland, presumably people who didn't know how to work their cameras properly. 
 

Once the total eclipse phase was over and we had packed up our camera and 
telescope tripods, the clouds parted so we could see a partially eclipsed sun. 
Oh well, maybe in another lifetime!

One of my fellow workmates who was on that trip was determined to see a total 
eclipse and has been all over the world to try to catch one, I think it took 
him about 4 trips before he was lucky enough.

Wayne, wishing you clear skies for your eclipse.


73 from David GM4JJJ

> On 7 May 2017, at 17:00, Wayne Burdick  wrote:
> 
> Hi all,
> 
> My wife, son and I are planning to drive to Oregon or Idaho to view the solar 
> eclipse on August 21st. Hotels in the rarified Zone of Totality are either 
> sold out or price-gouging. We booked one 50 miles outside the path, just in 
> case, but we'd love to find an AirBnB room or other option closer in, if 
> possible. 
> 
> Anyone have a hot tip for us?
> 
> Tnx
> Wayne
> N6KR
> 
> 
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Re: [Elecraft] Mounting a KX3+PX3 ?

[David Anderson via Elecraft]

That will be https://gemsproducts.com/ not gemproducts.com which is something 
totally unrelated :-)

73 from David GM4JJJ



> On 4 Apr 2017, at 05:19, KD6QZX  wrote:
> 
> Go to gemproducts.com I have mounts for just this need!   73 Scott AK6Q
> 
> 
>On Thursday, March 30, 2017 11:52 AM, Colin VE3MSC [via Elecraft] 
>  wrote:
> 
> 
>  Any recommendations on how to mount a KX3+PX3 ?  I want to try it out with
> my microwave setup, and would like to mount them on flat board or aluminum
> base, and was wondering what people have done for mounting brackets?
> 
> Thanks in advance and 73,
> 
> Colin VE3MSC
> 
>  
> 
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>   To unsubscribe from Elecraft, click here.
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> 
> 
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> 
> 
> -
> K3 #348 KX3 #2499
> --
> View this message in context: 
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Re: [Elecraft] Mounting a KX3+PX3 ?

[David Anderson via Elecraft]

Have a look at the Go Box made by KG5EIU, his Flickr stream shows how he did it.

https://flic.kr/p/FoYs5W

73 from David GM4JJJ

> On 30 Mar 2017, at 19:52, Colin Haig (VE3MSC)  wrote:
> 
> Any recommendations on how to mount a KX3+PX3 ?  I want to try it out with
> my microwave setup, and would like to mount them on flat board or aluminum
> base, and was wondering what people have done for mounting brackets?
> 
> Thanks in advance and 73,
> 
> Colin VE3MSC
> 
> 
> 
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Re: [Elecraft] Augment KX3 or buy K3?

[David Anderson via Elecraft]

Morgan, you make some good points about the pros and cons, but I would take 
issue with one point, the IC-7300 is very easy to change CW speed - one click 
of the multi knob and twist it to the speed you want when you are in CW mode. 

Like all radios you have to spend a bit of time learning how to drive it to 
full, it also depends if you have used one from the same stable before, though 
the touch interface of the 7300 is slightly different and I am not sure I 
prefer it to hard buttons, but clearly that is the way future radios are going, 
viz the pre-announced but unavailable IC-7610. 

I have the KX3 with PX3 and the IC-7300 and a recent, but used, hence less 
expensive than a K3,  IC-7600 which was available at the right price, and I 
have to say that the IC-7300 has many things that make its ergonomics just 
great, in many ways better than the older IC-7600. I am in the U.K. and that 
colours my choices as Elecraft are doubly expensive here compared to the USA 
unfortunately. I paid more in the UK for my KX3 maxed out than a base K3 would 
cost in the USA, you get the picture.

They are all great rigs, it all depends how much you expect to pay for a radio 
and what you want to do with it. No manufacturer is going to sell a top end 
contest radio for $1000, so whether it the big 3 from JA or Elecraft you have 
to spend the dollar to get the best. For the money the IC-7300 is excellent and 
a  pointer to how Icom is going with their mid range , and I still prefer to 
have an IC-7300 than the money in the bank as it is such a good radio on 6m and 
4m. 

If you post on an Elecraft forum asking about another manufacturer's product 
you will get a certain reaction, same if you you posted to an Icom forum about 
the Elecraft K3S. So always take anything you read pro or con with a punch of 
salt. Best advice is to actually try the radio you think that you want to buy, 
every 2nd ham you speak to on the air appears to have an IC-7300 so it 
shouldn't be hard to find one to try out.

73 from David GM4JJJ

> On 8 Mar 2017, at 14:29, Morgan Bailey  wrote:
> 
> If you are even marginally serious about operating around other rigs (field
> day), forget using the 7300. It does not have the necessary filtering to be
> useful in that environment. Forget CW pileups with the 7300. The comment on
> buttons is rather laughable when you mention the 7300, one knob and
> infinite menus even to just change the CW speed. 1200$ for a 7300 is best
> spent sitting in the bank. The KX3 blows it away. If you can pick up a 7300
> for 750$ then go for it but understand it is not an Elecraft. You are
> buying a bells and whistles radio and not a contest grade by any means
> communication grade radio.
> 
> As for the 7610, it is all promises and yet to be totally revealed. If it
> is even half the rig that people are saying it is, well, good stuff does
> not come cheap. Expect a 3500-4000 dollar price point. And if it breaks,
> forget having the rig faster than a 3 month turn around. Call up Elecraft
> and you get a guy who speaks the Kings English and knows the rig and most
> likely can tell you what needs to be replaced over the phone.
> 
> Don't get me wrong, The 7300 is a nice package. It is a very beginner
> radio. It does a lot of stuff and is one of the easiest rigs to get
> computer control interfaced with. Especially, if you want to do psk modes
> then it is very nice and just by plugging in a USB cable, you are on the
> air. That and HRD and you are cooking.  For a contest grade radio, no. For
> a beginner radio, it has many bells and whistles that are nice but
> filtering is not one of them, unfortunately, because their front end
> selectivity is weak.
> 
> Right now I have seen many TS590s / SG for sale for under 1k. These radios
> are easily computer linked. Using a K1EL winkeyer and N1MM, what a great
> combination. I found one outstanding feature is their internal antenna
> tuner. It matches stuff that easily a 10:1 SWR mismatch and does not fold
> back the power after the match. I have personally used one on Field Day at
> least 2 times and they worked great for CW and SSB. Their menu is intuitive
> and easily addressed. For a beater radio, it is great. They have really
> good front ends for their price point and excellent selectivity. They run
> 100 watts off the line and recently QRZ had one for sale for $750. Now that
> is where I would spend my sheckles. If I were looking for a second rig and
> wanted less cabledom problems for the best radio and the least dollars,
> done deal. Does it compare to a K3S, not even marginally, but most people
> if you sat them down in front of a radio would know enough to know the
> difference.
> 
> In the end, truth be told, most ops will never realize the capability of a
> KX3, KX2 or K3S and would be just as happy with any rig that would let them
> get on and talk to their good buddies, give weather reports or talk about
> hog farming on 160 at 11pm at 

Re: [Elecraft] (OT) Follow-up on CW Resonant Speaker

[David Anderson via Elecraft]

Stan,

Thanks for the video, most impressive.

I have one comment regarding the need for an amplifier with the KX1 /KX2 or KX3 
radios, there is another YouTube video from a couple of years ago that appears 
to be almost what the more recent QST article is based upon and in it the 
constructor has it connected to a KX1 and it seems loud enough.

https://youtu.be/4iNELueaU6M

Then there is another video where another constructor dissects the original 
commercial design and makes one, this really shows how efficient the design is 
when at the end he compares the bare speaker on its own and how weak it sounds 
compared to when it resonates.

https://youtu.be/MF8bk6958Hg

The key seems to be that in both of the above cases the lower part of the 
resonant speaker is + not + sealed completely, air is allowed to enter and 
exit, though there is sound deadening material in the cavity. Perhaps that 
explains the greater sound efficiency?

This is something I plan to investigate myself with my KX3, once I get the 
parts here, of course being in the UK we are now metric and so some slight 
adjustments are necessary as our pipe is 50mm and so on. A friend has offered 
the services of his laser cutter and 3D printer which will come in handy too!

73 from David GM4JJJ

> On 14 Feb 2017, at 00:49, stan levandowski  wrote:
> 
> Folks, I posted about having built the CW Resonant Speaker in the February 
> 2017 and having problems with low audio.  This is a follow-up report for 
> those with interest in this subject.
> 
> It works!  It's fabulous!  It's unbelievable how great it sounds! CW pops out 
> and background noise is significantly reduced.
> 
> 
> I built it EXACTLY as described in the article and ordered the EXACT parts 
> listed.  My problem was not enough audio coming from either my KX1 or my KX2 
> headphone jacks.  
> 
> 
> I purchased a fully assembled 15 watt mono amplifier - Qianson TDA2030A 15W 
> Mono Channel Audio Power Amplifier Board AC/DC 12V AMP Module - Amazon for 
> $11.80.
> 
> 
> With the new amp, my speaker is acoustically resonant at 760 Hz and I have 
> plenty of volume; enough to fill the room.  The author had claimed "around 
> 700 Hz" so it's in the ballpark.  I can verify that the construction article 
> was accurate.
> 
> 
> I wanted 600 Hz so I built a vinyl sleeve to insert into the street elbow and 
> set my sidetone pitch for 600 Hz then slid the sleeve up and down until I got 
> a very obvious peak in volume.
> 
> 
> I'm still a "can fan" for serious CW operating, but it's nice to be able to 
> listen to sweet CW that pops right out now that the higher frequency sounds 
> are substantially subdued.
> 
> 
> This was a really worthwhile little project.
> 
> 
> 73, Stan WB2LQF
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Re: [Elecraft] K2 IF output

[David Anderson via Elecraft]

Ken,

Sorry to be the bearer of bad news, but G4HUP died last week at the age of 68, 
a great loss to the community.

We have no word on the future, if any, of his excellent products.

73 from David GM4JJJ

> On 13 Feb 2017, at 19:02, Ken Chandler  wrote:
> 
> Contact G4HUP who makes various kits, I've one here.
> See 
> http://G4hup.com.
> The work is first class.
> 
> Ken.. G0ORH
> 
> Sent from my iPad
> 
> 
>> On 13 Feb 2017, at 17:43, Ken G Kopp  wrote:
>> 
>> Who makes a Clifton Labs Z1000B replacement for the K2?
>> 
>>> On Feb 13, 2017 07:46, "Don Wilhelm"  wrote:
>>> 
>>> Ken,
>>> 
>>> Sorry, but I do not.
>>> There is a ham in England who produces a buffer amplifier that can be
>>> used, but I cannot recall who.
>>> If you ask on the reflector for a Clifton Labs Z1B replacement, you
>>> may get some hits.
>>> 
>>> 73,
>>> Don W3FPR
>>> 
 On 2/13/2017 9:20 AM, Ken G Kopp wrote:
 
 GM Don!
 
 Can / do you supply the IF output circuit for the K2?
 
 73
 
 Ken - K0PP
 
 On Feb 13, 2017 07:15, "Don Wilhelm donw...@embarqmail.com >>> donw...@embarqmail.com> [KX3]" >> kx3-nore...@yahoogroups.com>> wrote:
 
   Bob,
 
   Check out the Win4K3 software (http://va2fsq.com/spectrum-scopes/
   ). It
   has support for the KX2 which allows the use of SDRPlay to produce a
   panadapter display.
 
   73,
   Don W3FPR
 
 
 
   On 2/13/2017 8:29 AM, rl3ja...@gmail.com
    [KX3] wrote:
> 
> 
> So the question is - Has anyone been able to put together a viable
> support system for signal analysis (aka - Panadapter?) that can
   be used
> directly with the KX2?
> 
   __._,_.___
   
 
   Posted by: Don Wilhelm >
   
 
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Re: [Elecraft] WSJT-X Problem with K3S

[David Anderson via Elecraft]

> On 17 Jan 2017, at 16:48, John Stengrevics  wrote:
> 
> Many thanks to all who provided their suggestions.
> 
> I decided to try Joe's (W4TV) suggestion and elect RTS.  That appears to have 
> solved the problem of the transmit staying on.
> 
> My only remaining problem is a 100 to 200 millisecond spillover into the next 
> sequence.  I have synched my Mac to time.nist.gov  and 
> the time.is  site shows that I am dead on. If anyone has any 
> suggestions, they would be much appreciated.


The Mac can be quite difficult to keep accurately time syncd using NTP, as it 
doesn’t always check the time from the best server and many other little snags 
like not checking very often sometimes.

If you have a reasonably modern version of the Mac OS then add some other NTP 
servers for your region to the Date & Time preferences, after the standard 
Apple one, separated by a comma. For example just add:

1.pool.ntp.org, 2.pool.ntp.org after whatever Apple has chosen.

In Europe I use

time.euro.apple.com, 1.uk.pool.ntp.org, 2.uk.pool.ntp.org

Please use your own region's ntp pool 

Uncheck "Set date and time automatically" and recheck it, it should update it.

Open a terminal window and type ntpq -p

You will get a list of the servers and their offsets (in ms) as well as other 
nerdy stuff. You will notice that NTP slowly drift corrects the clock. It only 
polls slowly so you have to be patient, but the good thing is it should learn.

Hope that helps

73

David GM4JJJ











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Re: [Elecraft] WSJT-X Problem with K3S

[David Anderson via Elecraft]

In MSK144 the T/R periods for meteor scatter are normally 15 seconds on 50 MHz, 
so it is important for all stations to have their clocks as accurate as they 
can, within half a second will do, but the closer the better.

Just to explain further, on meteorscatter it is possible for many stations to 
share the same frequency, as bursts are short and one station may not hear the 
same burst as another if they are in a slightly different location. We use 
conventions for which transmit period to use based on where we are beaming in 
one of the 4 quadrants. For example if beaming East or South we transmit on the 
second period so start at 15 secs after the top of the minute. 

This allows a couple of locals to both call CQ or work another station on the 
same frequency without hearing each other, but they are both able to hear and 
respond to any callers. If their clocks are a second or more out then there 
will be a slight overlap and the locals will interfere with each other for that 
short overlap time period. 

There will have to be a slight delay for relays and sequencers of course. There 
is a 200 ms software TX Delay between PTT being asserted and data sending in 
WSJT-X by default to allow relays to settle, though a hardware sequencer is a 
safer solution.

All of the above is covered in the online documentation for WSJT-X

http://www.physics.princeton.edu/pulsar/K1JT/wsjtx-doc/wsjtx-main-1.7.1-devel.html#SYSREQ

73 from David GM4JJJ

> On 17 Jan 2017, at 18:02, Nr4c  wrote:
> 
> Mine only transmits for around 42 seconds.   So should not impact the rec on 
> next minute. 
> 
> Sent from my iPhone
> ...nr4c. bill
> 
> 
>> On Jan 17, 2017, at 11:48 AM, John Stengrevics  
>> wrote:
>> 
>> Many thanks to all who provided their suggestions.
>> 
>> I decided to try Joe's (W4TV) suggestion and elect RTS.  That appears to 
>> have solved the problem of the transmit staying on.
>> 
>> My only remaining problem is a 100 to 200 millisecond spillover into the 
>> next sequence.  I have synched my Mac to time.nist.gov 
>>  and the time.is  site shows that I 
>> am dead on.  If anyone has any suggestions, they would be much appreciated.
>> 
>> 73,
>> 
>> John
>> WA1EAZ
>> 
>>> On Jan 13, 2017, at 1:53 PM, Guy Olinger K2AV  wrote:
>>> 
>>> Can't argue entirely with success, but often folks just want to put the 
>>> trouble In a cage so they can get on with having fun. I get that, it's a 
>>> hobby. For sure, been there done that. 
>>> 
>>> But all you have done for the moment is put the snarling dog in a cage 
>>> where it can't bite. If you ever run an amp the trouble is likely to return 
>>> in some form. You still have the snarling dog. 
>>> 
>>> And there are unanswered oddities like why the RFI only affected the one 
>>> sequence of commands. 
>>> 
>>> For others reading this thread, the exhortations for VOX or PTT are very 
>>> well taken, particularly where deciding on methodology is part of planning. 
>>> 
>>> Having a PTT and not-PTT signal available to the station *system* can be 
>>> very useful for such things as shutting off remote RX amps during transmit. 
>>> Many PC station programs like N1MM+ can add transfer delays only where they 
>>> apply, as do WinKey equipped devices which can apply CW key speed related 
>>> "word space" intervals. 
>>> 
>>> Not-PTT drives a simple circuit to supply a keyed 12 VDC supply that is 
>>> only on when it's safe from TX induced voltages, and can drive relays to 
>>> detune towers and de-resonate wires when RX. 
>>> 
>>> Given that the K3S board has both a USB/serial chip and a sound card on it, 
>>> no workable scheme proven robust for the K3 has to be discarded for the 
>>> K3S. 
>>> 
>>> All that aside, glad you you managed to cage the snarling dog, by whatever 
>>> means.  :>)
>>> 
>>> 73, Guy K2AV 
>>> 
>>> On Thursday, January 12, 2017, John Stengrevics >> > wrote:
>>> Three turns of the USB cable through a #43 ferrite and I am good to go at 
>>> full power (95 watts).
>>> 
>>> John
>>> WA1EAZ
>>> 
 On Jan 12, 2017, at 2:40 PM, Edward R Cole > wrote:
 
 Now that the thread has morphed to RFI:
> 
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Re: [Elecraft] WSJT-X MSK144 & Transmit Delay

[David Anderson via Elecraft]

John,

This will not be the answer, but interestingly I has a similar problem using 
WSJT-X MSK144 with an IC-7300 initially. It turned out it was the PC com port 
power saving setting.  It caused a 5 seconds delay while it woke it up! 

Good luck with getting it solved, I have been a Mac user since they came out, 
but in the end decided that for the radio I was better off getting a Windows 
PC, and I leave my Macs for everything else, photography, programming, internet 
and so on.  But let's not get into a Mac v PC discussion as we know where that 
leads to.

73 from David GM4JJJ

> On 17 Jan 2017, at 12:11, John Stengrevics  wrote:
> 
> Max, 
> 
> Thanks for the reply.  I should have mentioned that I am using a Mac.  I have 
> synched to time.nist.gov  and the time.is 
>  app shows that I am dead on.
> 
> John
> WA1EAZ
> 
>> On Jan 16, 2017, at 10:13 PM, M. George  wrote:
>> 
>> PC Clock drift can be quite bad as we all know.  The default NTP server sync 
>> interval for Windows 10, is once a week.  So your clock can be way off by 
>> the time you sync again.  With a one time NTP sync, you can still be off 
>> into the 100 ms range.  I suspect some of the JST related software etc... 
>> might force a sync at startup and or do NTP server syncs on their own?  
>> Someone else will need to chime in on that.
>> 
>> The best time sync you are going to get for Windows and Linux / BSD based 
>> operating systems will be us use the full on NTP client.  For windows, 
>> Meinberg has a nice graphical client that installs and sets itself up as a 
>> service and disables the windows NTP client service.  During the Meinberg 
>> NTP install, you have an option to draw from the NTP pool of NTP servers and 
>> you can also type in your own preferred NTP server list.  The full NTP 
>> client does more than just sync your clock... over time it will calculate 
>> the drift of your clock and discipline your clock automatically between sync 
>> checks to your selected NTP servers.  The drift is calculated in PPM and for 
>> the curious you can see how bad your clock is.
>> 
>> Here is the link for the Win32 install of the Meinberg client (free):
>> 
>> 
>> https://www.meinbergglobal.com/english/sw/ntp.htm#ntp_stable 
>> 
>> 
>> I run 3 GPS disciplined NTP servers (3 separate GPS receivers) here at my 
>> QTH and if you want, you are welcome to use time.nc7j.com 
>>  as one of your NTP servers.  On this end, 
>> time.nc7j.com  is accurate into the nano second range 
>> as compared to the GPS on board atomic clocks.  Via NTP UDP sync over the 
>> Internet, the best you will typically do is get down into the lower 
>> microsecond range...  and far more accurate than any thing most would ever 
>> need.  time.nc7j.com  is also a member of the NTP 
>> pool and you can see if it's up and running be going to this link: 
>> http://www.pool.ntp.org/scores/time.nc7j.com 
>>   The chart here doesn't show 
>> the accuracy of the time.nc7j.com , but it shows the 
>> ping offset from LA to Utah and it's normal to vary +- 10ms.  Your mileage 
>> will vary with your round trip ping times to any NTP server, but over time, 
>> NTP wil
 l
>  do an amazing job of figuring out your PC clock drift and then disciplining 
> it on the fly.
>> 
>> For the totally 'time accuracy obsessed', you can install the Meinberg NTP 
>> monitor too and monitor your clock accuracy via logged NTP statistics: 
>> https://www.meinbergglobal.com/english/sw/ntp-server-monitor.htm#download 
>> 
>> 
>> The Meinberg apps are GUI's that make native calls to the full NTP install 
>> under the covers and they are totally free and free of any nag related 
>> nonsense.
>> 
>> If you are running Linux or iOS, you are already running a native NTP client 
>> I suspect and you can read up on how to configure it just like the Meinberg 
>> Windows GUI's do for Windows.
>> 
>> Max NG7M
>> 
>> mg
>> 
>> 
>> 
>> On Mon, Jan 16, 2017 at 7:30 PM, stengrevics > > wrote:
>> My clock is synched to time.nist.gov .  But, when I 
>> transmit on MSK144, I have
>> a delay of 900 ms that pushes my transmission into the next sequence. Any
>> thoughts?
>> 
>> Thanks,
>> 
>> John
>> WA1EAZ
>> 
>> 
>> 
>> --
>> View this message in context: 
>> http://elecraft.365791.n2.nabble.com/WSJT-X-MSK144-Transmit-Delay-tp7625818.html
>>  
>> 
>> Sent from the Elecraft mailing list archive at Nabble.com.
>> __
>> Elecraft 

Re: [Elecraft] KX3 Switch Tones

[David Anderson via Elecraft]

I guess it should, I have not ever used SW TONE ON so had not noticed. As a 
workaround could program a macro key to switch it off and switch to data mode I 
suppose and then do the reverse when you exit data mode.

73 from David GM4JJJ

> On 7 Jan 2017, at 14:30, Thorpe, Jeffrey  wrote:
> 
> I've noticed that with switch tones set on (SW TONE) that the KX3 will 
> transmit the tone out the speaker port when in data mode. Shouldn't this be 
> disabled in data mode? It does it whether transmitting or receiving, and 
> messes things up.
> 
> Jeff - kg7hdz
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Re: [Elecraft] Audio artifacts in DATA A mode with KX3

[David Anderson via Elecraft]

Many thanks and a Happy New Year to all!

73 from David GM4JJJ

> On 3 Jan 2017, at 21:46, Nicklas Johnson <n...@n6ol.us> wrote:
> 
> Thank you, Wayne!  At least we know we're not crazy :-)
> 
>Nick / N6OL
> 
>> On 3 January 2017 at 13:45, Wayne Burdick <n...@elecraft.com> wrote:
>> This is on the KX3 firmware list. I'll move it up a notch.
>> 
>> Wayne
>> N6KR
>> 
>> 
>> On Jan 3, 2017, at 12:16 AM, David Anderson via Elecraft 
>> <elecraft@mailman.qth.net> wrote:
>> 
>> > Nick,
>> >
>> > Thank you for bringing this up.
>> >
>> > I never did get a satisfactory explanation, I contacted support too but 
>> > that didn't get me anywhere either, I don't think they understood my 
>> > question, which is quite simple really, why can't we get the same 
>> > bandwidth in Data mode as in SSB mode? I think it's a simple oversight, 
>> > but nobody seemed interested in acknowledging it or fixing it.
>> >
>> >
>> > 73 from David GM4JJJ
>> >
>> >> On 2 Jan 2017, at 23:54, Nicklas Johnson <n...@n6ol.us> wrote:
>> >>
>> >> Jörg in the Elecraft KX3 group on Facebook had an interesting observation:
>> >> with WJST's waterfall, if the "flatten" mode is on, it produces some
>> >> unusual artifacts in the presence of sharp spectrum drop-offs, and indeed
>> >> if I turn off the "flatten" feature and manually set the zero point for 
>> >> the
>> >> waterfall, the artifacts go away.
>> >>
>> >> It's still an open question as to why the data-a mode has a steep drop-off
>> >> at 400Hz when the PBT settings on the rig would seem to indicate 
>> >> otherwise,
>> >> and the same drop-off isn't there in USB mode.
>> >>
>> >> I see searching on "400 Hz" that GM4JJJ had the same question here on the
>> >> last back in July 2015, but never really got an answer.  I basically have
>> >> the same question as this one:
>> >> https://www.mail-archive.com/elecraft@mailman.qth.net/msg183837.html
>> >>
>> >>  Nick
>> >>
>> >>
>> >>> On 2 January 2017 at 12:06, Nicklas Johnson <n...@n6ol.us> wrote:
>> >>>
>> >>> I'm seeing some unexpected audio artifacts when using DATA A mode with 
>> >>> the
>> >>> latest production firmware on my KX3, on all bands.  This is something I
>> >>> observe when the PBT BW is set all the way wide (4KHz) and FC is 
>> >>> centered.
>> >>>
>> >>> In DATA mode, there's an audio drop-off between 200 and 325 Hz, with an
>> >>> almost completely dead audio "hole" between 250 and 300 Hz.  Then there's
>> >>> some additional noise between 350 and 500 Hz.
>> >>>
>> >>> If I switch to USB mode (with no EQ or audio effects applied, naturally),
>> >>> all of these artifacts go away, and it's perfectly smooth across the
>> >>> spectrum.  No drop-off, no noise.
>> >>>
>> >>> Pictures of the waterfalls for comparison here: http://imgur.com/a/AjHu4
>> >>>
>> >>> Am I doing something wrong, or is there something I should check?  I've
>> >>> taken the usual steps, but it's plausible I've missed something.
>> >>>
>> >>> ​   Nick​
>> >>>
>> >>> --
>> >>> *N6OL*
>> >>> Saying something doesn't make it true.  Belief in something doesn't make
>> >>> it real. And if you have to lie to support a position, that position is 
>> >>> not
>> >>> worth supporting.
>> >>>
>> >>
>> >>
>> >>
>> >> --
>> >> *N6OL*
>> >> Saying something doesn't make it true.  Belief in something doesn't make 
>> >> it
>> >> real. And if you have to lie to support a position, that position is not
>> >> worth supporting.
>> >> __
>> >> Elecraft mailing list
>> >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> >> Help: http://mailman.qth.net/mmfaq.htm
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>> >>
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>> >> Please help support this email list: http://www.qsl.net/donate.html
>> >> Message delivered to gm4...@yahoo.co.uk
>> >
>> > __
>> > Elecraft mailing list
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>> > Message delivered to n...@elecraft.com
>> 
> 
> 
> 
> -- 
> N6OL
> Saying something doesn't make it true.  Belief in something doesn't make it 
> real. And if you have to lie to support a position, that position is not 
> worth supporting.
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Re: [Elecraft] Audio artifacts in DATA A mode with KX3

[David Anderson via Elecraft]

Harry,

This isn't a switch it on and off again problem I am afraid. It is simply that 
the KX3 Data Mode is restricted in bandwidth at the low end, unlike the SSB 
mode on the same radio. Bizarre but true.

73 from David GM4JJJ

> On 3 Jan 2017, at 00:00, Harry Yingst via Elecraft  
> wrote:
> 
> Back when I was playing with SDR's I would notice the same thing (Deep nulls)
> Sometimes resetting the software (or turning the rig on and off again) would 
> cure it.
> 
> Something to try
> 
> 
> 
> 
>  From: Nicklas Johnson 
> To: elecraft  
> Sent: Monday, January 2, 2017 6:54 PM
> Subject: Re: [Elecraft] Audio artifacts in DATA A mode with KX3
> 
> Jörg in the Elecraft KX3 group on Facebook had an interesting observation:
> with WJST's waterfall, if the "flatten" mode is on, it produces some
> unusual artifacts in the presence of sharp spectrum drop-offs, and indeed
> if I turn off the "flatten" feature and manually set the zero point for the
> waterfall, the artifacts go away.
> 
> It's still an open question as to why the data-a mode has a steep drop-off
> at 400Hz when the PBT settings on the rig would seem to indicate otherwise,
> and the same drop-off isn't there in USB mode.
> 
> I see searching on "400 Hz" that GM4JJJ had the same question here on the
> last back in July 2015, but never really got an answer.  I basically have
> the same question as this one:
> https://www.mail-archive.com/elecraft@mailman.qth.net/msg183837.html
> 
>   Nick
> 
> 
>> On 2 January 2017 at 12:06, Nicklas Johnson  wrote:
>> 
>> I'm seeing some unexpected audio artifacts when using DATA A mode with the
>> latest production firmware on my KX3, on all bands.  This is something I
>> observe when the PBT BW is set all the way wide (4KHz) and FC is centered.
>> 
>> In DATA mode, there's an audio drop-off between 200 and 325 Hz, with an
>> almost completely dead audio "hole" between 250 and 300 Hz.  Then there's
>> some additional noise between 350 and 500 Hz.
>> 
>> If I switch to USB mode (with no EQ or audio effects applied, naturally),
>> all of these artifacts go away, and it's perfectly smooth across the
>> spectrum.  No drop-off, no noise.
>> 
>> Pictures of the waterfalls for comparison here: http://imgur.com/a/AjHu4
>> 
>> Am I doing something wrong, or is there something I should check?  I've
>> taken the usual steps, but it's plausible I've missed something.
>> 
>> ​  Nick​
>> 
>> --
>> *N6OL*
>> Saying something doesn't make it true.  Belief in something doesn't make
>> it real. And if you have to lie to support a position, that position is not
>> worth supporting.
>> 
> 
> 
> 
> -- 
> *N6OL*
> Saying something doesn't make it true.  Belief in something doesn't make it
> real. And if you have to lie to support a position, that position is not
> worth supporting.
> __
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> 
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Re: [Elecraft] Audio artifacts in DATA A mode with KX3

[David Anderson via Elecraft]

Nick,

Thank you for bringing this up.

I never did get a satisfactory explanation, I contacted support too but that 
didn't get me anywhere either, I don't think they understood my question, which 
is quite simple really, why can't we get the same bandwidth in Data mode as in 
SSB mode? I think it's a simple oversight, but nobody seemed interested in 
acknowledging it or fixing it.


73 from David GM4JJJ

> On 2 Jan 2017, at 23:54, Nicklas Johnson  wrote:
> 
> Jörg in the Elecraft KX3 group on Facebook had an interesting observation:
> with WJST's waterfall, if the "flatten" mode is on, it produces some
> unusual artifacts in the presence of sharp spectrum drop-offs, and indeed
> if I turn off the "flatten" feature and manually set the zero point for the
> waterfall, the artifacts go away.
> 
> It's still an open question as to why the data-a mode has a steep drop-off
> at 400Hz when the PBT settings on the rig would seem to indicate otherwise,
> and the same drop-off isn't there in USB mode.
> 
> I see searching on "400 Hz" that GM4JJJ had the same question here on the
> last back in July 2015, but never really got an answer.  I basically have
> the same question as this one:
> https://www.mail-archive.com/elecraft@mailman.qth.net/msg183837.html
> 
>   Nick
> 
> 
>> On 2 January 2017 at 12:06, Nicklas Johnson  wrote:
>> 
>> I'm seeing some unexpected audio artifacts when using DATA A mode with the
>> latest production firmware on my KX3, on all bands.  This is something I
>> observe when the PBT BW is set all the way wide (4KHz) and FC is centered.
>> 
>> In DATA mode, there's an audio drop-off between 200 and 325 Hz, with an
>> almost completely dead audio "hole" between 250 and 300 Hz.  Then there's
>> some additional noise between 350 and 500 Hz.
>> 
>> If I switch to USB mode (with no EQ or audio effects applied, naturally),
>> all of these artifacts go away, and it's perfectly smooth across the
>> spectrum.  No drop-off, no noise.
>> 
>> Pictures of the waterfalls for comparison here: http://imgur.com/a/AjHu4
>> 
>> Am I doing something wrong, or is there something I should check?  I've
>> taken the usual steps, but it's plausible I've missed something.
>> 
>> ​   Nick​
>> 
>> --
>> *N6OL*
>> Saying something doesn't make it true.  Belief in something doesn't make
>> it real. And if you have to lie to support a position, that position is not
>> worth supporting.
>> 
> 
> 
> 
> -- 
> *N6OL*
> Saying something doesn't make it true.  Belief in something doesn't make it
> real. And if you have to lie to support a position, that position is not
> worth supporting.
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Re: [Elecraft] Checking VFO accuracy using WWV

[David Anderson via Elecraft]

It is human nature to be disappointed if we don't get the nominal figure, but 
only the lower limit  even if still within spec.  We wouldn't complain if we 
got a few Watts more than the 100 Watts, and of course 100 Watts sounds like a 
lot more than 89 Watts just as $100 does to $89. 

73 from David GM4JJJ

> On 19 Dec 2016, at 08:12, Walter Underwood  wrote:
> 
> For the KXPA100, the tolerance is specified. See page 30 of the manual.
> 
> "Power Output: Max.100 watts at 13.8 V, 1.8 to 29.7 MHz and 80 watts 50-54 
> MHz PEP CW/SSB/DATA, ± 1 dB“
> 
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
> 
>> On Dec 18, 2016, at 9:22 PM, Jim Brown  wrote:
>> 
>> On Sun,12/18/2016 2:04 PM, Wes Stewart wrote:
>>> If the manufacturer specifies that the transmitter puts out 100W, and 
>>> indeed uses that as a part of the part number on the order sheet, then it's 
>>> not unreasonable for the customer to expect 100 W out. 
>> 
>> The published spec is 100W typical, with no tolerance specified.
>> 
>> 73, Jim K9YC
>> 
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[Elecraft] PX3 frequency resolution with RX SHIFT at 8 kHz?

[David Anderson via Elecraft]

Today in order to eliminate the annoying VFO noise on 28 MHz when using my 
transverter, I changed the KX3 RX Shift from NOR to 8 kHz. 

I immediately noticed something was different with the PX3. Particularly when 
using narrow spans to examine weak CW signals like beacons. The waterfall 
display shows blocky noise and the frequency resolution of the narrow CW signal 
is much less than a with the RX Shift at Normal.

Is this by design or some limitation? I would prefer if it were possible to hVe 
the same resolution on the PX3 in either RX SHIFT mode.


73 from David GM4JJJ
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Re: [Elecraft] Digital on the K3S

[David Anderson via Elecraft]

George,

I have to say all the ARRL QST "video reviews" are terrible. So dumbed down, 
Bob telling you where the antenna socket is, and that kind of thing. Of no 
earthly use. I really don't know why they bother, I have never learned a thing 
from any of them. 

73 from David GM4JJJ

> On 30 Nov 2016, at 04:58, M. George  wrote:
> 
> Wow that ARRL review on the K3S was terrible (and I'm being generous)...
> sorry I even put a link in for it.  There must be a better video review out
> there.  Sorry.
> 
> Max NG7M
> 

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Re: [Elecraft] JT65 ON THE KX2

[David Anderson via Elecraft]

I think the mode referred to with the 42 seconds TX time is JT65 not DATA-A. 
Simple misunderstanding.



73 from David GM4JJJ

> On 7 Nov 2016, at 02:04, Walter Underwood  wrote:
> 
> What??? That isn’t in any spec or manual for the KX2. Why 42 seconds? 
> 
> The KX2 manual says this, on page 27:
> 
> "5.0 watts or lower is recommended in all data modes. The KX2 will reduce 
> power, if necessary, to maintain a safe operating temperature.”
> 
> http://www.elecraft.com/manual/E740282%20KX2%20owner's%20man%20A5.pdf 
> 
> 
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
> 
>> On Nov 6, 2016, at 4:46 PM, Nr4c  wrote:
>> 
>> Check manual for digital modes using DATA A submode. Watch power out as this 
>> mode has a 42 second 100% TX time. 
>> 
>> Sent from my iPhone
>> ...nr4c. bill
>> 
>> 
>>> On Nov 6, 2016, at 11:31 AM, Robert 'RC' Conley  wrote:
>>> 
>>> How is it accomplished?
>>> 
>>> -- 
>>> May You Live Long and Prosper
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Re: [Elecraft] Chinese Filters on eBay

[David Anderson via Elecraft]

Thanks, excellent work!

73 from David GM4JJJ

> On 3 Nov 2016, at 16:08, Mark Goldberg  wrote:
> 
> Here is the link. Forgot to add it at the end. Posting on a small screen
> will get you.
> 
> https://sites.google.com/site/markstcxomeasurements/
> 
> 73,
> 
> Mark
> W7MLG
> 
>> On Nov 3, 2016 8:43 AM, "Mark Goldberg"  wrote:
>> 
>> Since you brought this up, I will post a link to my analysis of the
>> knockoff "TCXOs" for the Kenwoods. You do get what you pay for, and you
>> can't even buy good parts for what they charge.
>> 
>> The added phase noise of the Chinese parts increases the phase noise of
>> the TX by about 10 dB 15 kHz away. It also is full of spurs.
>> 
>> Basically, if you were on a DXpedition with 100W, you would splatter and
>> interfere like you had a kilowatt. By the way, the K3S with the new
>> synthesizer is even better in this regard. It is at least 20 dB lower which
>> would be more like if you had 1 W.
>> 
>> Only the good RX filters in the Kenwood radio prevent degradation in RMDR
>> on most bands. They basically made a really bad synthesizer, and made it
>> look like a TCXO. There is a lot more to it than just being on frequency
>> 
>> 73,
>> W7MLG
>> 
>>> On Nov 2, 2016 3:05 PM, "Michael Walker"  wrote:
>>> 
>>> I bought a TCXO on ebay for  my TS480 (SO-3).  I installed it and then put
>>> the RF deck in the oven and then outside (it was winter).
>>> 
>>> I went through the Alignment calibration to see how far it drifted.  I
>>> can't remember the exact number, but it was within limits in terms of PPM.
>>> Which was great, as my TS480 sits outside all winter on the remote base
>>> and
>>> that is as low as -30C at times.   It has been there for 7 years now (or
>>> more).
>>> 
>>> For me, it was as test for $30 including shipping direct to my door.  It
>>> looked exactly like the SO-3 @ $135  plus shipping.
>>> 
>>> So, before you declare the entire electronics world as poison, you do need
>>> to do your homework.
>>> 
>>> Don't forget, this is an experimental hobby.
>>> 
>>> Try Something
>>> 
>>> Mike va3mw
>>> 
 On Wed, Nov 2, 2016 at 5:58 PM, Fred Jensen  wrote:
 
 From my short experience with LiIon batteries from China ["Blue Bombs"],
 I'd save up my bucks and get the real Elecraft filters.
 
 73,
 
 Fred K6DGW
 - Sparks NV DM09dn
 
 - Northern California Contest Club
 - CU in the Cal QSO Party 7-8 Oct 2017
 - www.cqp.org
 
> On 11/2/2016 9:44 AM, AL7CR wrote:
> 
> I am tempted to try one of the Chinese made filters listed for sale on
> Ebay.   Does anyone have any experience with using one?  I am
> considering the 1.8khz.
> 
 
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>> 
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Re: [Elecraft] PX3: Possible problem with display

[David Anderson via Elecraft]

Further, I found this reply from Wayne (back in 2014)

On Oct 14, 2014, at 6:35 AM, jsdroyster at nc.rr.com wrote: > Our panadapter 
regularly (but not always) shows wide green bands of "noise" before the antenna 
is connected. When present, the bands are visible in the same panadapter screen 
location regardless of wbich band the radio is turned to, but the locations 
vary day to day (sometimes at the low end of the screen, other times in the 
middle). The white line on the screen rises to peaks above these green areas. 
Are you using a PX3 or P3? Assuming it's a PX3, try this: - make sure RX I/Q is 
set to ON (KX3 menu) - make sure the PX3->KX3 cables are fully seated - connect 
an antenna to the KX3 - switch to 20 meters - turn the preamp ON and set the 
PREAMP menu entry on the KX3 to 20 dB - set the PX3's SPAN to 50 kHz or lower - 
adjust the REF level so the "grass" (noise floor) is close to the bottom of the 
spectral plot With the above setup, there will typically be no visible fixed 
spectral lines on the PX3. As described in the PX
 3 FAQ on our web site, very wide SPAN settings and low front-end gain (e.g., 
turning off the preamp) will reduce the signal-to-noise ratio of an RX 
I/Q-based pandapter, including making wideband spurs more apparent. The same 
limitations apply when using the KX3 (or other quadrature downconversion radio) 
with a PC sound card. Typically this doesn't impact usability, e.g. locating 
signals of interest. In fact most sound cards are limited to displaying about 
48 kHz of spectrum, while the PX3 can go wider thanks to its 
high-performance/high-speed A-to-D converter. The P3 uses a completely 
different method of acquiring the signal for spectral display: It digitally 
down converts the K3's 8.2-MHz I.F. This provides a S/N and spur advantage over 
an RX I/Q approach, but requires much more complex circuitry -- hence the 
difference in cost between the two units. Wayne N6KR  

73 from David GM4JJJ

> On 9 Sep 2016, at 18:09, David Anderson via Elecraft 
> <elecraft@mailman.qth.net> wrote:
> 
> You will get spikes with no antenna where they are not covered up by band 
> noise. Also if you have a really big spike near where you are tuning, try 
> turning down the NB level in THE PX3 or turn the PX3 NB OFF.
> 
> Elecraft have explained about these spikes which are as a result of the 
> switched mode regulators in the PX3, but they are not a problem when you have 
> an antenna connected with band noise.
> 
> Let us know how that goes.
> 
> 73 from David GM4JJJ
> 
>> On 9 Sep 2016, at 16:31, Larry Naumann <n...@att.net> wrote:
>> 
>> Don
>> Thanks for the suggestion but that does not fix/improve the situation. 
>> Looking at it further I also have spikes at roughly 23, 30 and 52Khz above 
>> and below my cursor. The 52 Khz signal is at S4 the other two are about S2. 
>> I can turn on the PX3 and look at the display with no antenna connected and 
>> see these spikes on every band. If I disconnect the cables to the KX3 the 
>> signals are still there but go down to S1 in strength. I have even tried 
>> running both on separate battery supplies but the problem is the same. The 
>> spikes are there even if I disconnect the I/Q cable but the spikes are very 
>> small, as soon as the I/Q cable is plugged in the spikes increase.
>> Larry
>> n0sa
>>> On 9/9/2016 9:22 AM, Don Wilhelm wrote:
>>> Larry,
>>> 
>>> I suspect hum, buzz, and noise pickup on the RX I/Q cable shield between 
>>> the KX3 and the PX3.
>>> Try "Bonding" - run a heavy wire or strap between the KX3 and the PX3 in 
>>> parallel with the RX I/Q cable.  The shield from old RG-8 coax works well.
>>> 
>>> 73,
>>> Don W3FPR
>>> 
>>>> On 9/9/2016 10:12 AM, Larry Naumann wrote:
>>>> I have just recently noticed that there is a continual spike that follows 
>>>> my cursor. It is internally generated. In CW mode it is away from my tuned 
>>>> signal by the amount of my CW side tone setting and can be switched to 
>>>> above or below the cursor depending on if I am in CW or CW-R.
>>>> These spikes occur with no antenna connected and are S4 to S5 in strength 
>>>> depending on band.
>>>> I did the Opposite Sideband Rejection adjustment but show no improvement.
>>>> I think something is either set wrong or I have an issue.
>>>> Any help or ideas are appreciated.
>> 
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Re: [Elecraft] PX3: Possible problem with display

[David Anderson via Elecraft]

You will get spikes with no antenna where they are not covered up by band 
noise. Also if you have a really big spike near where you are tuning, try 
turning down the NB level in THE PX3 or turn the PX3 NB OFF.

Elecraft have explained about these spikes which are as a result of the 
switched mode regulators in the PX3, but they are not a problem when you have 
an antenna connected with band noise.

Let us know how that goes.

73 from David GM4JJJ

> On 9 Sep 2016, at 16:31, Larry Naumann  wrote:
> 
> Don
> Thanks for the suggestion but that does not fix/improve the situation. 
> Looking at it further I also have spikes at roughly 23, 30 and 52Khz above 
> and below my cursor. The 52 Khz signal is at S4 the other two are about S2. I 
> can turn on the PX3 and look at the display with no antenna connected and see 
> these spikes on every band. If I disconnect the cables to the KX3 the signals 
> are still there but go down to S1 in strength. I have even tried running both 
> on separate battery supplies but the problem is the same. The spikes are 
> there even if I disconnect the I/Q cable but the spikes are very small, as 
> soon as the I/Q cable is plugged in the spikes increase.
> Larry
> n0sa
>> On 9/9/2016 9:22 AM, Don Wilhelm wrote:
>> Larry,
>> 
>> I suspect hum, buzz, and noise pickup on the RX I/Q cable shield between the 
>> KX3 and the PX3.
>> Try "Bonding" - run a heavy wire or strap between the KX3 and the PX3 in 
>> parallel with the RX I/Q cable.  The shield from old RG-8 coax works well.
>> 
>> 73,
>> Don W3FPR
>> 
>>> On 9/9/2016 10:12 AM, Larry Naumann wrote:
>>> I have just recently noticed that there is a continual spike that follows 
>>> my cursor. It is internally generated. In CW mode it is away from my tuned 
>>> signal by the amount of my CW side tone setting and can be switched to 
>>> above or below the cursor depending on if I am in CW or CW-R.
>>> These spikes occur with no antenna connected and are S4 to S5 in strength 
>>> depending on band.
>>> I did the Opposite Sideband Rejection adjustment but show no improvement.
>>>  I think something is either set wrong or I have an issue.
>>> Any help or ideas are appreciated.
> 
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Re: [Elecraft] KXBC3 clock drift

[David Anderson via Elecraft]

Funnily enough the IC-7300 guys were complaining about the same thing ;-)

73 from David GM4JJJ

> On 28 Aug 2016, at 17:46, GRANT YOUNGMAN  wrote:
> 
> 
>> 
>> Re:  "...the clock seems to lose a couple of minutes per month.”
> 
> You know a radio must be pretty good when the complaints start drifting off 
> to how accurate (or not) it is as a timepiece ;-)
> 
> Grant NQ5T
> 
> 
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Re: [Elecraft] K3 Transmitting CW in SSB mode

[David Anderson via Elecraft]

> On 26 Jul 2016, at 06:01, ROBERT HEATH  wrote:
> 
> I think the above information covers all the bases. Your question 2 doesn't 
> mean anything to me because I don't believe any modern transceiver will send 
> CW while set for either SSB mode. 

Bob, the K3 and KX3 ( and possibly others) have this feature and that is what 
the OP was asking about. See SSB + CW. It is hidden away under the CW WGHT menu.

It is a -fantastically- useful feature especially on VHF bands where often CW 
can be used to help complete a contact that started on SSB and QSB made copy 
difficult. Just hit the paddles while still in SSB mode and send CW without 
having to think about changing to CW mode first and whether you need to alter 
VFO etc. The other station who has you tuned in on SSB will hear the CW in his 
receiver at approximately your chosen sidetone frequency. 

What can't all manufacturers have this ? - It is so blindingly obvious that if 
I use my key that I want to send CW and if I press my microphone PTT that I 
want to speak on SSB. Others make you have to press mode buttons just so I can 
quickly send a R or K on the key while in an SSB QSO. Well done Elecraft!

73 David GM4JJJ


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Re: [Elecraft] Linear PS Recommendations

[David Anderson via Elecraft]

Richard,

After a big search through my old documentation I have found all my design 
notes on the power supplies I built, I still have the Fairchild voltage 
regulator application handbook that I consulted at the time. Like you, I needed 
to build this supply for my first solid state high power equipment and  I still 
use it to this day. The smoothing electrolytics are 2 large 31,000 uF military 
standard capacitors which were used in battlefield computers.

The short circuit protection of the 25 Amp power supply appears to be something 
that I "designed" as it doesn't appear in the handbook in the form I used.  
Basically it uses a transistor that senses the output voltage dropping (as it 
would with a short circuit on the output) and this then triggers a small SCR 
which pulls the 723 compensation pin low which makes the 723 output voltage 
stop. This will remain like that until the short circuit is removed and the 
current through the SCR is broken by manually pushing a NC switch in series 
with the SCR. It works well, I have used it to zap NICADS that have gone short 
circuit! It just gives a brief pulse of high current and trips the supply, no 
fuse blowing etc.

Overvoltage protection is even cruder, it is a standard Crowbar circuit with 
very big 40 amp SCR and 16 V zener to sense. This will blow a 20 Amp fuse in 
the raw supply. It has never been used in anger, though I did test it with a 
smaller fuse. It is there only to protect against either a shorted pass 
transistor or some fault with the regulator circuitry.  Of course having a good 
current limit circuit with short circuit protection makes the likelihood of a 
series pass transistor failing short circuit more unlikely.

My design has 4 2N3055's in parallel (with low value resistors in the emitters 
to help share the current equally) driven by another 3055, the current sense 
resistor is in the base drive of the output series pass transistors. 

I have over temperature protection of the transformer with a bimetallic switch 
but that has never tripped.

I do have a soft start circuit on the primary using an AC relay and some high 
wattage resistors. 

I avoided using fans by using large heatsinks as fans are a source of failure 
over time. [I recall a commercial 5V 80 amp supply cooling fan failing at 
night, the supply shutting down for over temperature then coming back on again, 
rinse and repeat, until nearly every IC in a multimillion $ machine was 
damaged.]

Like so many projects this was developed from earlier projects, starting with a 
simple single transistor 3A PSU, then an 8A using more transistors, and finally 
the 25A supply with much more in the way of protection from likely fault 
conditions. 

I am not sure I could source the mains transformer or smoothing capacitors so 
easily nowadays if I wanted to build another one, as nearly all new designs are 
high efficiency switched mode supplies. 

I think it best if anyone else wants more details that they take this off the 
list and contact me directly as we are well over the limit on postings on this 
subject.

73 from David GM4JJJ

> On 23 Jul 2016, at 07:46, Richard Fjeld <rpfj...@outlook.com> wrote:
> 
> Hello David, (and Alan), and thanks to John for the link showing the added 
> parts.
> 
> David, your PS sounds very similar to the one I built, also in the 70's.  
> Mine has four 3055's on very large heat sinks that are overkill, but I didn't 
> know what to expect. 
> 
> I'm curious how your supply trips out, and if you used a relay?   It seems to 
> me that I did that, and when the 723 clamps down, the relay drops to open the 
> primary.  I have not had the time to review the schematic diagram, but as I 
> recall, if a pass transistor shorts out, the crowbar may try to shunt the 
> unregulated voltage, but the situation is not going to be good.  That is why 
> I like the device ad5x is showing on his website.  It will protect the radio 
> from over-voltage by blowing a fuse in the DC line.
> 
> If Alan is reading this, I'm wondering if I missed where that 'strategically 
> placed diode' is located?
> 
> Dick, n0ce
> 
> 
>> On 7/22/2016 10:16 AM, David Anderson via Elecraft wrote:
>> 
>> I later built a 25 Amp version with 4 3055s and a 723 with overvoltage trip, 
>> and also short circuit protection. It can be shorted out and with barely a 
>> spark it trips out and has to be reset before it comes on again. No fuses to 
>> blow and replace, no destroyed series pass transistors. I built it in a 
>> chassis that was lying around and 35 years later it is still in daily use 
>> and still not got a proper cover made for the chassis.  I checked the output 
>> the other day on my scope to see if there was any hum or ripple and on full 
>> load I had 10mV p-p of noise. Regulation still excellent.
>> 
>> 
>> 73 from Dav

Re: [Elecraft] Linear PS Recommendations

[David Anderson via Elecraft]

I have a couple of homebuilt DC regulated supplies that I built a great many 
years ago, the first is a simple 3A 13.5V one that was the very first supply I 
ever built and it used a 723 with a single 2N3055 series pass transistor. I 
remember I bought a lovely oil filled mains transformer for it, but 
accidentally wired up the 120V windings in parallel instead of series for our 
240V mains and watched it start to bulge when I switched it on. (after I put a 
bigger fuse in it).  I ended up using another transformer and the power supply 
is still in daily use, built in the early 70's.

I later built a 25 Amp version with 4 3055s and a 723 with overvoltage trip, 
and also short circuit protection. It can be shorted out and with barely a 
spark it trips out and has to be reset before it comes on again. No fuses to 
blow and replace, no destroyed series pass transistors. I built it in a chassis 
that was lying around and 35 years later it is still in daily use and still not 
got a proper cover made for the chassis.  I checked the output the other day on 
my scope to see if there was any hum or ripple and on full load I had 10mV p-p 
of noise. Regulation still excellent.

Nothing much wrong with the humble 723. 

I have seen some truly awful "commercial" supplies with no short circuit 
protection, that blow the series pass transistors like fuses, or worse make 
them into short circuits that apply the full unregulated supply on to the load.

73 from David GM4JJJ

> On 22 Jul 2016, at 15:55, Alan Bloom  wrote:
> 
> The 723 regulator has some known reliability issues, but with proper design 
> they can be mitigated.  In particular the differential voltage on the error 
> amplifier inputs is only rated for 5v.  If one input is connected to the 
> 7.15V reference, then if the power supply output is shorted the voltage 
> rating is exceeded.  The solution is a strategically-placed diode.
> 
> Alan N1AL
> 
> 

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Re: [Elecraft] K3 power oddity

[David Anderson via Elecraft]

Have you got enough audio level going in to drive the ALC meter up to 4.5 bars?

73 from David GM4JJJ

> On 17 Jul 2016, at 13:38, Leroy Buller  wrote:
> 
> Operated RTTY NAQP this weekend.   When changing bands, I noticed my power
> would drop to 40 watts or so.  After several transmissions, it would rise
> to 100 watts.  I don't think this is normal.   All antennas are matched.
> Comments?
> 
> Lee
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Re: [Elecraft] PX3-KX3 sideband null procedure

[David Anderson via Elecraft]

Not a dumb question at all Keith.

The adjustment you did just did only affects the PX3 not the KX3. It affects 
what the PX3 displays only, not what your KX3 hears.

73 from David GM4JJJ

> On 11 Jul 2016, at 21:31, Keith Hamilton  wrote:
> 
> Sorry if this is a dumb question.
> 
> I went through the sideband null procedure from page 31 of my PX3
> manual and everything went just as described.
> 
> My question is, was I making changes to the KX3 receiver or transmitter
> or just changes to the PX3?  In other words, does making the adjustments
> on the PX3 as described in the procedure change anything in the KX3?
> 
> Thanks!  Trying to learn!
> 
> Keith N8CEP
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Re: [Elecraft] K3: can someone test this please?

[David Anderson via Elecraft]

Thanks Dale and the otters who have kindly tested this for me.

As a KX3 owner I was trying to determine if there was any good reason why the 
VOX delay couldn't work with the TX Noise Gate. So it does appear this is a KX3 
BUG. 

Over to you Elecraft.

73 from David GM4JJJ

> On 10 Jul 2016, at 23:58, Dale Boresz <d...@lightstream.net> wrote:
> 
> David,
> 
> I can confirm that on the K3, the VOX Delay DOES work, regardless of
> whether the TX Gate is engaged or not.
> 
> 73,
> 
> Dale, WA8SRA
> 
>> Anybody?
>> 
>> 73
>> 
>> David Anderson GM4JJJ
>> 
>> 
>>> On 9 Jul 2016, at 19:07, David Anderson via Elecraft
>>> <elecraft@mailman.qth.net> wrote:
>>> 
>>> I have a KX3 and have found a bug (or feature) whereby the VOX delay
>>> does not function when the TX Noise Gate is in use.  Yes, I have
>>> reported it directly to Elecraft.
>>> 
>>> I would like to know if the K3 VOX delay works with the TX Noise Gate
>>> on?
>> 
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> 

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Re: [Elecraft] K3: can someone test this please?

[David Anderson via Elecraft]

Anybody?

73

David Anderson GM4JJJ


> On 9 Jul 2016, at 19:07, David Anderson via Elecraft 
> <elecraft@mailman.qth.net> wrote:
> 
> I have a KX3 and have found a bug (or feature) whereby the VOX delay does not 
> function when the TX Noise Gate is in use.  Yes, I have reported it directly 
> to Elecraft.
> 
> I would like to know if the K3 VOX delay works with the TX Noise Gate on?
> 

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[Elecraft] K3: can someone test this please?

[David Anderson via Elecraft]

I have a KX3 and have found a bug (or feature) whereby the VOX delay does not 
function when the TX Noise Gate is in use.  Yes, I have reported it directly to 
Elecraft.

I would like to know if the K3 VOX delay works with its TX Noise Gate on?

Many thanks,

73 from David GM4JJJ
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Re: [Elecraft] [KX3] SWR/PWR & CMP/ALC Meter

[David Anderson via Elecraft]

This happens when SSB + CW is enabled.  In CW WGHT menu tap 1 to toggle between 
SSB+CW (enabled) and SSB -  CW

Tapping Keyer/Mic knob toggles between Keyer speed and Mic Gain rather than 
Meter Scales  CMP/ALC and SWR/RF. The CMP/ALC scale is still shown temporarily 
when CMP or Mic Gain are adjusted.

You can switch to DATA mode then change meter scales by tapping Keyer/mic knob 
then go back to SSB. 

73 from David GM4JJJ

> On 9 Jul 2016, at 12:24, Joel Black  wrote:
> 
> I should have stated this in my initial post. I was specifically looking for 
> how to switch in data modes. Bob cleared that up. However, you are correct, 
> Fred. In SSB *or* SSB +CW, I have to press the CMP button to get the CMP/ALC 
> meter to come up. A tap of the KEYER/MIC knob doesn’t do it - it just 
> switches between CW speed and MIC gain.
> 
> Now, I’m glad you brought up SSB -CW and SSB +CW. I knew I had that on my K3 
> and I thought I had it on my KX3 but I couldn’t remember how to activate it 
> on the KX3. Somehow (again, the memory eludes me), I got SSB +CW working. 
> It’s not that big a deal I don’t guess except when you want to check power 
> out without going, “Hello, test, this is W4JBB.” :)
> 
> Thanks and 73,
> Joel - W4JBB
> 
>> On Jul 8, 2016, at 21:26, Cady, Fred  wrote:
>> 
>> That display seems to act differently depending on if you have SSB -CW or 
>> SSB +CW.  
>> Cheers,
>> Fred KE7X
>> 
>> 
>> From: Elecraft  on behalf of Joel Black 
>> 
>> Sent: Friday, July 8, 2016 7:39 PM
>> To: Elecraft Reflector Reflector
>> Subject: Re: [Elecraft] [KX3] SWR/PWR & CMP/ALC Meter
>> 
>> Thanks, Bob. Not sure why that was escaping me.
>> 
>> 73,
>> Joel - W4JBB
>> 
>>> On Jul 8, 2016, at 19:24, Bob N3MNT  wrote:
>>> 
>>> Tap keyer/mic to switch CMP/ALC  Power / SWR switch auto,automatically on
>>> transmit.
>>> 
>>> 
>>> 
>>> 
>>> --
>>> View this message in context: 
>>> http://elecraft.365791.n2.nabble.com/KX3-SWR-PWR-CMP-ALC-Meter-tp7619814p7619825.html
>>>  
>>> 
>>> Sent from the Elecraft mailing list archive at Nabble.com.
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>>> 
>>> Message delivered to joel.b.bl...@gmail.com
>> 
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Re: [Elecraft] [OT] Behringer HA400 Headphone Amp - Partial Review, Partial Wish List Item

[David Anderson via Elecraft]

Joel,

I also needed to switch between microphones and Data input with my KX3. I built 
a simple switch box myself, nothing more than some sockets, switches and wires. 
It allows me to select headset mic, desk mic or sound card.  

Also use the HA 400 on the receive side. I leave the KX3 audio at 40 all the 
time and adjust the HA400 to give me the volume I need, which for my sound card 
and wireless headphones is about 50% vol. My powered speakers and wired 
headphones about 25%.


73 from David GM4JJJ

> On 9 Jul 2016, at 12:48, Joel Black  wrote:
> 
> After having decided that the KX3 / PX3 combo would satisfy my amateur radio 
> needs, I sold my K3 / P3 combo. The only thing I *really* miss is the ability 
> to operate voice and data modes with the simple use of a macro - no cables to 
> disconnect and others to reconnect. I truly miss that. If someone (HINT, 
> HINT, Elecraft) could come up with a module where I could have my mic and 
> headphones hooked *plus* my sound card connections, I would be set. What 
> would it be worth? I don’t know - $100 to $200 I think would be in the 
> ballpark. Until that time comes, I will have to swap out my MIC and my sound 
> card IN connections but, because of some folks on this list, I don’t have to 
> do that with the audio OUT of the KX3.
> 
> A couple of days ago, the Behringer HA400 Headphone Amp I ordered arrived. I 
> quickly took it out of the carton, hooked up the SMPS that comes with it, and 
> connected the PHONES OUT of the KX3 to the input and hooked up my headphones, 
> Oontz Angle Speaker (which I’m *not* enamored with), and my sound card IN. 
> The Behringer HA400 works very well for what it is - a $25 stereo headphone 
> amp with multiple outputs.
> 
> I don’t notice any noise increase from the SMPS included with it, but I will 
> cut off the “wall wart” portion of it, install PowerPoles, and connect to my 
> DC distribution panel. The audio coming out of the KX3 is somewhat muted so I 
> have to run the KX3 AF up to about 35 to hear anything out of the Oontz 
> Angle. Doing that, I have the volume on the HA400 almost 1/2-way for the 
> Oontz Angle speaker. I am somewhat hard of hearing so others may find a lower 
> output fine. I will try another set of speakers and see if it’s just the 
> Oontz Angle.
> 
> Using my Sony MDR-V6 headphones, I have to run the AF up on my KX3 to about 
> 14 to get good audio out. Again, the output volume on the HA400 is about 
> 1/2-way. I also run the HA400 audio out for the sound card up about 1/2-way.
> 
> In all honesty, if you run the audio out on the HA400 more than 1/2-way, it 
> acts like a cheap preamp on a TV antenna - it amplifies everything. It 
> introduces too much noise to the audio path and decreases the amount of 
> intelligible audio out.
> 
> The HA400 is not a perfect solution but it works well enough for a $25 
> addition. I *do* wish Elecraft (or someone else) could come up with some sort 
> of add-on module for the KX3 (or the KX2 which I don’t have) that would make 
> it much easier to switch between voice and data modes. There is an audio 
> board made by TI called the C5535 (Google "TMS320C5535 eZdsp USB Kit") that 
> is very nice but also require a USB connection to the computer. If an add-on 
> module was developed around that board, I think that would be a wonderful 
> solution.
> 
> Thoughts? Wayne? I’d let Elecraft use my C5535 as a prototype. :)
> 
> Sorry, I’m not a designer, just a user but I’d surely pay for that.
> 
> Thanks for the bandwidth and have a great weekend.
> 
> 73,
> Joel - W4JBB
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Re: [Elecraft] KX3 4m transverter (UK)

[David Anderson via Elecraft]

I have a couple of questions asking why I am selling the 4m transverter for the 
KX3. (Is it no good? etc)

The reason is simply that I want to be able to work on 144 MHz with my KX3 wit 
external transverter AND monitor 70 MHz or 50 MHz, so I have another rig that 
covers 50/70 MHz and a dual band yagi for that now. The 4m transverter is 
therefore surplus to my needs.

No point in having 2 4m rigs here, better that another station uses it so I 
have another station to work on 4m :-0

73

David GM4JJJ



> On 2 Jul 2016, at 11:58, David Anderson via Elecraft 
> <elecraft@mailman.qth.net> wrote:
> 
> For anyone in the UK with a KX3 who wants to get on 4m, I have an Elecraft 
> internal transverter for the KX3 available for sale. I am prepared to fit it 
> to your KX3 if you bring it to my QTH.   
> 
> Price £169 fitted to your KX3. (List price is £269)
> 
> Can also ship this item, buyer pays postage. 
> Cash on collection or PayPal accepted  -  buyer pays PayPal fees. 
> 
> In addition I have a new and unused 5 element light weight PowAbeam Yagi. 
> 
> http://www.thedxshop.com/powabeam-antennas/70mhz-5-element-max-gain-4m5n50u.html
> 
> Ideal for portable or fixed station use. 
> Still in unopened box. 
> 
> Price £89  (List £94)
> 
> Buyer collects only please. 
> 
> Cash on collection or PayPal accepted  -  buyer pays PayPal fees. 
> 
> PS I can also perform the Extended VFO Temperature Calibration on the KX3, 
> this is recommended for 70 MHz SSB/CW. 
> 
> 73 David Anderson GM4JJJ
> 
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[Elecraft] FS: KX3 4m transverter (UK)

[David Anderson via Elecraft]

For anyone in the UK with a KX3 who wants to get on 4m, I have an Elecraft 
internal transverter for the KX3 available for sale. I am prepared to fit it to 
your KX3 if you bring it to my QTH.   

Price £169 fitted to your KX3. (List price is £269)

Can also ship this item, buyer pays postage. 
Cash on collection or PayPal accepted  -  buyer pays PayPal fees. 

In addition I have a new and unused 5 element light weight PowAbeam Yagi. 

http://www.thedxshop.com/powabeam-antennas/70mhz-5-element-max-gain-4m5n50u.html

Ideal for portable or fixed station use. 
Still in unopened box. 

Price £89  (List £94)

Buyer collects only please. 

Cash on collection or PayPal accepted  -  buyer pays PayPal fees. 

PS I can also perform the Extended VFO Temperature Calibration on the KX3, this 
is recommended for 70 MHz SSB/CW. 

73 David Anderson GM4JJJ

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Re: [Elecraft] PX3 Spike won't go away

[David Anderson via Elecraft]

Wow that was a lucky guess! I only remembered about it when playing with the 
PX3 NB level myself yesterday. 

David Anderson GM4JJJ


> On 27 Jun 2016, at 15:43, Sanger, Joseph <joseph.san...@nyumc.org> wrote:
> 
> Excellent observation, David.  That was my problem ... I didn't even remember 
> I had the NB function on the P3 and it was set way high 
> Many Thanks!
> 
> -- Joe
> -- WB2SSB
> 
> -Original Message-
> From: David Anderson [mailto:gm4...@yahoo.co.uk] 
> Sent: Monday, June 27, 2016 5:09 AM
> To: Sanger, Joseph
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] PX3 Spike won't go away
> 
> Check the PX3 NB setting, if the NB level is too high then the spike 
> increases as you describe.
> 
> 73 from David GM4JJJ
> 
>> On 23 Jun 2016, at 15:58, Sanger, Joseph <joseph.san...@nyumc.org> wrote:
>> 
>> I have developed a new problem with my PX3, which has been quietly sitting 
>> in a case for the past 6 months.
>> 
>> Whenever I tune across the display, there is a slowly rising spike at the 
>> base frequency (for instance, in USB mode this spike adheres to the left 
>> hand edge of the bandpass indicator on PX3 screeen), takes about 2-3 seconds 
>> or so to increase in intensity, and then dwarfs any of the signals on the 
>> band.  This spike tracks across as I tune; it is there whether or not the 
>> antenna is connected.  I can tune to stations and hear them fine, but the 
>> display is barely usable because of this very tall spike that won't go away. 
>>  I reseated my cables connecting the PX3 to KX3, with no change in behavior. 
>>  I have no other cables here to swap them out, and am kind of stuck
>> 
>> I have updated b both KX3 and PX3 to latest firmware, with no change in 
>> behavior.
>> 
>> Any thoughts would be GREATLY appreciated.
>> 
>> --Joe
>> --WB2SSB
>> 
>> Joseph J. Sanger, M.D.
>> Associate Professor of Radiology
>> Director, Radiology Informatics
>> 
>> 462 1st Ave.- OBH C 1st fl. Rm 7
>> New York, NY. 10016
>> 
>> Phone: (212) 263-3434
>> 
>> 
>> 
>> 
>> This email message, including any attachments, is for the sole use of the 
>> intended recipient(s) and may contain information that is proprietary, 
>> confidential, and exempt from disclosure under applicable law. Any 
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Re: [Elecraft] PX3 Spike won't go away

[David Anderson via Elecraft]

Check the PX3 NB setting, if the NB level is too high then the spike increases 
as you describe.

73 from David GM4JJJ

> On 23 Jun 2016, at 15:58, Sanger, Joseph  wrote:
> 
> I have developed a new problem with my PX3, which has been quietly sitting in 
> a case for the past 6 months.
> 
> Whenever I tune across the display, there is a slowly rising spike at the 
> base frequency (for instance, in USB mode this spike adheres to the left hand 
> edge of the bandpass indicator on PX3 screeen), takes about 2-3 seconds or so 
> to increase in intensity, and then dwarfs any of the signals on the band.  
> This spike tracks across as I tune; it is there whether or not the antenna is 
> connected.  I can tune to stations and hear them fine, but the display is 
> barely usable because of this very tall spike that won't go away.  I reseated 
> my cables connecting the PX3 to KX3, with no change in behavior.  I have no 
> other cables here to swap them out, and am kind of stuck
> 
> I have updated b both KX3 and PX3 to latest firmware, with no change in 
> behavior.
> 
> Any thoughts would be GREATLY appreciated.
> 
> --Joe
> --WB2SSB
> 
> Joseph J. Sanger, M.D.
> Associate Professor of Radiology
> Director, Radiology Informatics
> 
> 462 1st Ave.- OBH C 1st fl. Rm 7
> New York, NY. 10016
> 
> Phone: (212) 263-3434
> 
> 
> 
> 
> This email message, including any attachments, is for the sole use of the 
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Re: [Elecraft] Transverter setup on KX3

[David Anderson via Elecraft]

Ken,

Please read my inline comments below.

> I stumbled my way through the rest of the XV432 transverter alignment and 
> everything appears to be fine.  Just trying to do the transverter band setup 
> from page 21 in the KX3 manual.
> 
> "XVn RF sets the operating frequency".  I assume this means the transverter's 
> operating frequency?  Is it just a number for display like 432 or something?  

Yes 432 is correct.

You also have another setting for XVn IF which in my case is 14, your's will 
probably be 28.


> What's a legitimate number to enter when I'm setting up an XV432?  No 
> information in the manual.  I tried going to look at the transverter setup 
> for my KX3-2M option but it doesn't display any more??
> 
> "XVn PWR sets maximum power output in watts".  The XV432's maximum output is 
> 20 watts.  How come the setting only goes as high as 8 watts and then rolls 
> over back to 0.5 watts?

It isn't the transverter power output, but the input power to the transverter. 
I don't have an XV432 so don't know what it uses. I use a 2m transverter by ME 
and it can be set for powers up to 3 watts, that was what I chose for that 
setting, as it allows the setting of output power from the KX3 fairly 
accurately. 
> 
> "XVn OFS can compensate for frequency offset".  We read my local oscillator's 
> output to be 4 Hz high and left it at that.  Is this where I compensate for 
> that, if it's even needed?  If so, the manual doesn't say how to do it.  It 
> only says you don't need to do it for the KX3-2M/4M module.  That doesn't 
> help me.

This is a handy feature if your transverter LO is out a bit, you can put the 
compensation figure in there, and either measure the transverter output 
frequency on transmit, or use an accurate signal into the receive side and 
adjust it to get the right dial reading when using CW and tuned in accurately. 
4 Hz isn't going to be a problem you could leave it at 0. The KX3 will probably 
be out more than that. 
> 
> "XVn ADR".  It doesn't sound like I really need to do this if I have just the 
> one XV transverter.  The Key Line at ACC2 keys the transverter just fine 
> as-is.

Fine. 

In my case I have my 144 MHz transverter on XV2  and XV2 ADR is trn2

My internal 70 MHz transverter  and XV1 ADR is Int. trn0



>  My next transverter will most likely be for 1296, which unfortunately means 
> it won't be an Elecraft. In that case I guess I can still set it up as a band 
> in my KX3 but I'll have to manually disconnect my XV432 and then connect up 
> the 1296 transverter.  Well, or use a good antenna switch or relay.


Yes you will want to investigate a way to do the switching of IF and Keyline. 
There are ways to do this automatically if you build a decoder to read the KX3 
band from the serial port. G4FRE makes a board with a PIC to do just that, 
though you need to supply your own relays for the IF switching.
> 
> Thanks in advance for any assistance!
> 
> 73,
> 
> Ken Alexander
> VE3HLS

73

David GM4JJJ


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Re: [Elecraft] OT- FS Bodnar GPS Ref Osc

[David Anderson via Elecraft]

Wes,

I too was promised that the Software would be updated. It was once since I 
bought mine, to fix a serious bug that had been introduced. This was a long 
time ago. However it has not had another cosmetic item fixed yet. (The window 
is too tall for my tiny laptop I sometimes use). 

Saying that I don't have any problem using or understanding the item or the 
software. 

Like so many things, documentation is totally missing or poor. 

I am surprised that Leo has not replied, he was prompt with my request in the 
beginning. 

73

David Anderson GM4JJJ


> On 13 Jun 2016, at 14:16, Wes Stewart <wes_n...@triconet.org> wrote:
> 
> I've had one of these since January.  I am pleased with the device, but the 
> documentation and software leave much to be desired.  Actually, they leave 
> everything to be desired.  ARRL had the same observation in their recent 
> review. After seeing that and mention that there was new documentation in the 
> works, I emailed a query and have yet to receive a reply.
> 
> Wes  N7WS
> 
>> On 6/13/2016 4:59 AM, David Anderson via Elecraft wrote:
>> Yes a really useful piece of kit, has many uses around the shack or in the 
>> field. For example to do the extended   temperature VFO calibration for the 
>> KX3. It is tiny and low power, and very quick to lock on to GPS. No wait for 
>> oven to heat up.
>> 
>> There are two versions, one with even lower phase noise, though the standard 
>> one is excellent.
>> 
>> 73 from David GM4JJJ
>> 
>>> On 12 Jun 2016, at 18:10, brian<als...@comcast.net>  wrote:
>>> 
>>> Great for locking K3 master osc.
>>> 
>>> 450Hz to 800 MHz, programmable. Low phase noise.
>>> 
>>> See
>>> http://www.force12inc.com/products/gps-locked-precision-frequency-reference-low-jitter-gps-clock-450-hz-to-800-mhz-output.html
>>> 
>>> Two outputs available. Second output can be a different frequency. USB 
>>> powered or external power.  Once setup, computer not needed.
>>> 
>>> $195 shipped.
>>> 
>>> de Brian/K3KO
>>> 
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Re: [Elecraft] OT- FS Bodnar GPS Ref Osc

[David Anderson via Elecraft]

Yes a really useful piece of kit, has many uses around the shack or in the 
field. For example to do the extended   temperature VFO calibration for the 
KX3. It is tiny and low power, and very quick to lock on to GPS. No wait for 
oven to heat up. 

There are two versions, one with even lower phase noise, though the standard 
one is excellent.

73 from David GM4JJJ

> On 12 Jun 2016, at 18:10, brian  wrote:
> 
> Great for locking K3 master osc.
> 
> 450Hz to 800 MHz, programmable. Low phase noise.
> 
> See
> http://www.force12inc.com/products/gps-locked-precision-frequency-reference-low-jitter-gps-clock-450-hz-to-800-mhz-output.html
> 
> Two outputs available. Second output can be a different frequency. USB 
> powered or external power.  Once setup, computer not needed.
> 
> $195 shipped.
> 
> de Brian/K3KO
> 
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[Elecraft] KX3 Noise Gate VOX delay BUG?

[David Anderson via Elecraft]

This is the -third- time of asking, I have no response from Elecraft on this at 
all, rather disappointing given well known their excellent customer service. 

-

A few weeks ago another ham in this list asked if anyone else had noticed a bug 
with the way that the KX3 handles VOX when the TX Noise gate is set to ON. With 
any gate level more than 00 the VOX delay setting is ignored and the VOX drops 
out immediately. 

I checked with my KX3 and indeed that is the case.

I don't know if this is specific to the KX3, as I don't have a K3 or KX2.

The other ham has reported this to Elecraft but has heard no more on the matter.

My question is, can this be fixed in firmware or is there some limitation that 
prevents the VOX delay from working with the TX Noise gate?

Many thanks,

73 from David GM4JJJ
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Re: [Elecraft] : logging/k3s control program

[David Anderson via Elecraft]

VQLOG is what most VHF UHF guys use Ed. by EA6VQ. I have used it for years. 
73

David Anderson GM4JJJ


> On 5 Jun 2016, at 17:22, Edward R Cole <kl...@acsalaska.net> wrote:
> 
> Barely dare ask, but is there a logging program suited for VHF logging?  My 
> logs are simply excel spreadsheets and cover:
> No. MO/DY/YR TIME CALLSIGN GRID LOCATION DXCC WAS FREQ MODE QSL-RX QSL-SENT
> Last two columns track QSLs received "X" or sent "MO/DA/YR"
> 
> Especially would be nice to determine with callsign entry if I had worked the 
> station, previously.  MY log is an initial contact log and I do not enter 
> repeat contacts.  Present use is all manual entry and search.  Grid is six 
> digit locator. e.g. on 2m-eme I have 438 initial contacts (distinct 
> callsigns).
> 
> So far I run contests on paper with pencil.  Eme and VHF contests normally 
> are not so fast and furious as on HF.
> But a log that saves frequency, mode and date info while one enters time and 
> call would be nice on contests, especially if it would detect a dupe.  Be 
> most handy tallying score and entering contest log.  Cabrillo conversion 
> would be nice for contests.
> 
> I keep separate logs by band (only logging 6m+ contacts)
> 
> 73, Ed - KL7UW
> http://www.kl7uw.com
>"Kits made by KL7UW"
> Dubus Mag business:
>dubus...@gmail.com
> 
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Re: [Elecraft] KX3 4m transverter specification on spurious outputs?

[David Anderson via Elecraft]

Some better news, actual a lot better news, after reviewing my test setup, I 
discovered that my SDR was overloaded, and the products at 20 kHz either side 
on SSB were IMD in the SDR, they vanished by using less gain in the SDR. The 
other spikes which contain no modulation are about 76 dB down on the wanted 
signal, an awful lot better than I had measured earlier. They are at about 12 
kHz spacing and must be some DC - DC converter noise I guess.

On transmit on CW with no key down there are no sign of those spikes. They only 
appear when the key is down or in SSB irrespective of mic audio.

So things are looking perfectly OK as regards purity at least for a low power 
rig. I still wouldn't put this into an amplifier however.

The heat sinking issue with the PA is another matter, fortunately I don't use 
FM or AM, and FSK may not work anyway as the stability may not be sufficient, 
though it looks not too bad.

Let me be the first to apologise for my hasty review based on hurried and 
unscientific testing on my part. I clearly was in a panic having looked forward 
to getting this transverter and then sing what appeared to be major problems 
with its purity. 

The acid test will be on air testing with a close neighbour to see if they 
notice any problems. I don't have my yagi installed yet, so that will have to 
wait. 

73 from David GM4JJJ

> On 1 Jun 2016, at 19:32, David Anderson via Elecraft 
> <elecraft@mailman.qth.net> wrote:
> 
> I have just fitted a 4m internal transverter into my KX3 today. I wanted to 
> check the signal stability and quality on a load before putting it on the 
> air, and used my SDR as a spectrum analyser to examine the output. I have 
> used this SDR in the past for examine other transmitters so know it's 
> limitations and strengths.
> 
> Here are my observations so far:
> 
> 1) There is on frequency carrier leakage from the receiver. This isn't a big 
> deal, and is explained in the manual.
> 
> 2) When in transmit on SSB or CW with no keying or audio input, there are a 
> forest of spurs close to the operating frequency, they are independent of the 
> power setting. Perhaps 50 dB or less down on PEP. This is concerning. I will 
> do more accurate tests.
> 
> 3) When modulated there are products either side of the main signal that do 
> vary with modulation. They are again not very many dB down. This is very 
> concerning.
> 
> 4) I tried a transmission at 3W for a couple of minutes, and the PA 
> temperature quickly rose to the cut off point. Yes, I have tightened the 
> screw on the PA to the side wall. This will be a problem if using the rig on 
> high duty cycle modes like JT65. The PA of the transverter is a FET bolted to 
> the side wall of the KX3 and does not directly make use of any third party 
> heatsink that may be bolted to the top.
> 
> 5) Mysteriously a couple of times I have seen a High SWR warning briefly at 
> start of transmission.   
> 
> On the positive side the frequency stability is acceptable for SSB and CW. It 
> may even be for JT65 or FSK441.
> 
> I have not found any specification for the spectral purity of the 4m 
> transverter, so don't know if this is what Elecraft expect or not. It 
> certainly isn't up to my standards for a commercial amateur transmitter and I 
> wouldn't subject my friends to such a signal on the air.
> 
> The only thing in the installation manual that was unclear is the exact 
> routing of the LO cable from the RF board to the transverter by the heatsink 
> and the filter board and battery holder. I suppose there is a small 
> possibility that the routing of that cable may affect the levels of Spurs on 
> the signal. I may try some small adjustments and see.
> 
> I was going to build a medium (30 W) or high power (150 W) amplifier for the 
> transverter, but clearly I would not like to amplify a signal as impure as 
> this. My plans for 4m have now changed to an IC7300, and I may keep the KX3 
> 4m transverter as a backup or for portable work with QRP.
> 
> If anybody else has tested their 4m or 2m internal transverter for spectral 
> quality I would be interested in their comments.
> 
> 73 from David GM4JJJ
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[Elecraft] KX3 4m transverter specification on spurious outputs?

[David Anderson via Elecraft]

I have just fitted a 4m internal transverter into my KX3 today. I wanted to 
check the signal stability and quality on a load before putting it on the air, 
and used my SDR as a spectrum analyser to examine the output. I have used this 
SDR in the past for examine other transmitters so know it's limitations and 
strengths.

Here are my observations so far:

1) There is on frequency carrier leakage from the receiver. This isn't a big 
deal, and is explained in the manual.

2) When in transmit on SSB or CW with no keying or audio input, there are a 
forest of spurs close to the operating frequency, they are independent of the 
power setting. Perhaps 50 dB or less down on PEP. This is concerning. I will do 
more accurate tests.

3) When modulated there are products either side of the main signal that do 
vary with modulation. They are again not very many dB down. This is very 
concerning.

4) I tried a transmission at 3W for a couple of minutes, and the PA temperature 
quickly rose to the cut off point. Yes, I have tightened the screw on the PA to 
the side wall. This will be a problem if using the rig on high duty cycle modes 
like JT65. The PA of the transverter is a FET bolted to the side wall of the 
KX3 and does not directly make use of any third party heatsink that may be 
bolted to the top.

5) Mysteriously a couple of times I have seen a High SWR warning briefly at 
start of transmission.   

On the positive side the frequency stability is acceptable for SSB and CW. It 
may even be for JT65 or FSK441.

I have not found any specification for the spectral purity of the 4m 
transverter, so don't know if this is what Elecraft expect or not. It certainly 
isn't up to my standards for a commercial amateur transmitter and I wouldn't 
subject my friends to such a signal on the air.

The only thing in the installation manual that was unclear is the exact routing 
of the LO cable from the RF board to the transverter by the heatsink and the 
filter board and battery holder. I suppose there is a small possibility that 
the routing of that cable may affect the levels of Spurs on the signal. I may 
try some small adjustments and see.

I was going to build a medium (30 W) or high power (150 W) amplifier for the 
transverter, but clearly I would not like to amplify a signal as impure as 
this. My plans for 4m have now changed to an IC7300, and I may keep the KX3 4m 
transverter as a backup or for portable work with QRP.

If anybody else has tested their 4m or 2m internal transverter for spectral 
quality I would be interested in their comments.

73 from David GM4JJJ
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[Elecraft] KX3 Noise Gate VOX delay BUG

[David Anderson via Elecraft]

A few weeks ago another ham in this list asked if anyone else had noticed a bug 
with the way that the KX3 handles VOX when the TX Noise gate is set to ON. With 
any gate level more than 00 the VOX delay setting is ignored and the VOX drops 
out immediately. 

I checked with my KX3 and indeed that is the case.

I don't know if this is specific to the KX3, as I don't have a K3 or KX2.

The other ham has reported this to Elecraft but has heard no more on the matter.

My question is, can this be fixed in firmware or is there some limitation that 
prevents the VOX delay from working with the TX Noise gate?

Many thanks,

73 from David GM4JJJ
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Re: [Elecraft] TX Noise Gate on KX3 kills VOX delay setting

[David Anderson via Elecraft]

Michael,

Did you hear back from Elecraft on the noise Gate VOX delay bug?

73 from David GM4JJJ

> On 2 May 2016, at 20:45, David Anderson <gm4...@yahoo.co.uk> wrote:
> 
> Thanks Michael, let us know when you hear anything back from them.
> 
> I wonder if the same thing happens with a K3? 
> 
> 73 from David GM4JJJ
> 
>> On 2 May 2016, at 18:41, Michael Blake <k9...@mac.com> wrote:
>> 
>> I only received two customer responses and they both confirmed what I am 
>> seeing on my KX3.  I have forwarded the issue as a “bug” to Elecraft support.
>> 
>> Michael Blake
>> k9...@mac.com <mailto:k9...@icloud.com>
>> 
>> 
>> 
>> 
>> 
>> 
>>> On Apr 30, 2016, at 10:36 AM, Michael Blake <k9...@mac.com> wrote:
>>> 
>>> Has anyone else noticed this TX Noise Gate versus VOX Delay setting 
>>> interaction?
>>> 
>>> Michael Blake
>>> k9...@mac.com <mailto:k9...@icloud.com>
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>>> On Apr 29, 2016, at 7:08 PM, Michael Blake <k9...@mac.com> wrote:
>>>> 
>>>> When the TX Noise Gate is set to “On” with any gate level more than “00” 
>>>> the VOX delay setting is ignored and the VOX drops out immediately.  Is 
>>>> this by design?
>>>> 
>>>> I am using MCU version 2.34 and DSP version 1.33
>>>> 
>>>> Michael Blake
>>>> k9...@mac.com <mailto:k9...@icloud.com>
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
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>>> 
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Re: [Elecraft] KX2 on JT65 & JT9 ??

[David Anderson via Elecraft]

Fair enough, I am very happy with my KX3, a third party heatsink made it work 
for me on digital modes at the power I need. I mainly use it on 144 MHz 
currently with an external transverter. I actually enjoyed doing the 
temperature compensation procedure, it was fun.

The 817 is a nice all in one rugged box, however you can't compare the 
ergonomics or receive performance with the KX3.

Compromises have been made in the KX3 to make it small as a trail radio, a much 
bigger heatsink would not have been appreciated by hikers. They did upgrade the 
heatsink (a bit) in later models however. The KX2 uses the si5351 instead of 
the si570 synth, so in theory could use an external high stability reference. 

I prefer some of the features in the KX3 that the KX2 doesn't have, and like 
the larger size, AM FM, 50 MHz, PX3 option, internal 4m transverter option. So 
for me the choice remains the KX3. Good to have a choice though. The new 
internal battery pack is about the only thing in the KX2 that I wish the KX3 
had. 

73 from David GM4JJJ

> On 30 May 2016, at 12:50, D Howard <va...@me.com> wrote:
> 
> David
> I thought at the price I paid for the KX3 I shouldn't have to do the 
> compensation nor run the KX3 at such reduced power once compensated. My 
> trusty old FT817 worked fine.
> I also assumed Elecraft would address the issue with an updated KX3 -ie an 
> 'KX3s' at  some point.
> So I sold it awaiting the 'upgrade' which turned out to be the KX2 !
> Which is far more stable out of the box. 
> I'm happy to now order a KX2!
> 73/72
> Dan VA3MA
> 
>> On May 30, 2016, at 4:01 AM, David Anderson <gm4...@yahoo.co.uk> wrote:
>> 
>> Dan ,
>> 
>> I am surprised that you couldn't get WSJT to go with your KX3 and had to 
>> sell it.
>> 
>> I am using my KX3 (note not a KX2) on WSJT on 144 MHz EME JT65b. I did 
>> however do the extended temperature VFO compensation first and that perhaps 
>> is a key requirement. The KX3 was actually more stable than my original 144 
>> MHz transverter's TCXO, which I had to replace with a better TCXO to get the 
>> transmit drift to satisfactory levels. 
>> 
>> 
>> 73 from David GM4JJJ
>> 
>>> On 30 May 2016, at 04:45, D Howard <va...@me.com> wrote:
>>> 
>>> Luke
>>> I too sold my KX3 for the same reason- no WSJT. 
>>> Happy to see KX2 capable with care
>>> Dan
>>> 
>>>> On May 29, 2016, at 11:20 PM, Luke <auric...@yahoo.com> wrote:
>>>> 
>>>> I just tried JT9 actually and had no problems. If you head over to 
>>>> PSKReporter and type in my call sign you can see how it's been working for 
>>>> me this evening. It seems to heat up a little faster using JT9, but it's 
>>>> still managable. I don't mind taking a few minutes between QSO's to let 
>>>> things cool off. From my understanding Gemsproducts.com already has KX2 
>>>> side handles in the works and I will definitely pick some up and see how 
>>>> they work. I can only imagine that any more metal on the side to pick up 
>>>> some extra heat will only be a good thing.
>>>> 
>>>> Luke
>>>> AD0KI
>>>> 
>>>> 
>>>> 
>>>> 
>>>> From: Dan - VA3MA <va...@me.com>
>>>> To: Luke <auric...@yahoo.com> 
>>>> Cc: Elecraft <elecraft@mailman.qth.net>
>>>> Sent: Sunday, May 29, 2016 9:14 PM
>>>> Subject: Re: [Elecraft] KX2 on JT65 & JT9 ??
>>>> 
>>>> Luke
>>>> Thanks - just what I needed to know!
>>>> Have you tried JT9 ?
>>>> Perhaps some sort of heatsink/handles added to the case might help??
>>>> 73
>>>> Dan VA3MA
>>>> 
>>>> 
>>>> On 2016-05-29, at 22:37, Luke <auric...@yahoo.com> wrote:
>>>> 
>>>> Hmm, not sure why it cut out my message. Here's what I wrote:
>>>> 
>>>> I've used my KX2 on WSPR and JT65 and it appears to be plenty stable. I 
>>>> used to have a KX3  and sold it because it wouldn't decode WSPR between 
>>>> transmit cycles due to excessive drift. I've kept the KX2 to <5 watts 
>>>> because the right sideplate gets very hot with the high duty cycle.
>>>> 
>>>> I've actually just been sitting here running JT65 @ 10 watts when I got 
>>>> your email, and it is doing pretty well. I had 3 back to back QSO's and on 
>>>> the last transmission the PA Temp got up to 47C (~117F) which doesn't seem 
>>>> too bad. As it cools off there is no drifting or slanting 

Re: [Elecraft] KX2 on JT65 & JT9 ??

[David Anderson via Elecraft]

Dan ,

I am surprised that you couldn't get WSJT to go with your KX3 and had to sell 
it.

I am using my KX3 (note not a KX2) on WSJT on 144 MHz EME JT65b. I did however 
do the extended temperature VFO compensation first and that perhaps is a key 
requirement. The KX3 was actually more stable than my original 144 MHz 
transverter's TCXO, which I had to replace with a better TCXO to get the 
transmit drift to satisfactory levels. 


73 from David GM4JJJ

> On 30 May 2016, at 04:45, D Howard  wrote:
> 
> Luke
> I too sold my KX3 for the same reason- no WSJT. 
> Happy to see KX2 capable with care
> Dan
> 
>> On May 29, 2016, at 11:20 PM, Luke  wrote:
>> 
>> I just tried JT9 actually and had no problems. If you head over to 
>> PSKReporter and type in my call sign you can see how it's been working for 
>> me this evening. It seems to heat up a little faster using JT9, but it's 
>> still managable. I don't mind taking a few minutes between QSO's to let 
>> things cool off. From my understanding Gemsproducts.com already has KX2 side 
>> handles in the works and I will definitely pick some up and see how they 
>> work. I can only imagine that any more metal on the side to pick up some 
>> extra heat will only be a good thing.
>> 
>> Luke
>> AD0KI
>> 
>> 
>> 
>> 
>> From: Dan - VA3MA 
>> To: Luke  
>> Cc: Elecraft 
>> Sent: Sunday, May 29, 2016 9:14 PM
>> Subject: Re: [Elecraft] KX2 on JT65 & JT9 ??
>> 
>> Luke
>> Thanks - just what I needed to know!
>> Have you tried JT9 ?
>> Perhaps some sort of heatsink/handles added to the case might help??
>> 73
>> Dan VA3MA
>> 
>> 
>> On 2016-05-29, at 22:37, Luke  wrote:
>> 
>> Hmm, not sure why it cut out my message. Here's what I wrote:
>> 
>> I've used my KX2 on WSPR and JT65 and it appears to be plenty stable. I used 
>> to have a KX3  and sold it because it wouldn't decode WSPR between transmit 
>> cycles due to excessive drift. I've kept the KX2 to <5 watts because the 
>> right sideplate gets very hot with the high duty cycle.
>> 
>> I've actually just been sitting here running JT65 @ 10 watts when I got your 
>> email, and it is doing pretty well. I had 3 back to back QSO's and on the 
>> last transmission the PA Temp got up to 47C (~117F) which doesn't seem too 
>> bad. As it cools off there is no drifting or slanting of signals on the 
>> waterfall either. I think the 1 minute on/off duty cycle of JT65 is very 
>> doable with the KX2, and WSPR might be pushing it. The other night the 
>> sideplate got quite hot running WSPR at 5 watts.
>> 
>> Luke
>> AD0KI
>> 
>> 
>> From: Dan - VA3MA 
>> To: Luke  
>> Sent: Sunday, May 29, 2016 8:12 PM
>> Subject: Re: [Elecraft] KX2 on JT65 & JT9 ??
>> 
>> Luke
>> No content
>> 
>>> On May 29, 2016, at 8:51 PM, Luke via Elecraft  
>>> wrote:
>>> 
>>> 
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Re: [Elecraft] OT: Wireless stereo headset recommendations

[David Anderson via Elecraft]

Thank you Ed, most useful.

73 from David GM4JJJ

> On 29 May 2016, at 14:51, Ed  wrote:
> 
> David
> 
> There are a number of headsets on the market that will do the job.  What to 
> look for is an inter office device that is used for remote telephone service. 
>  Jabra has an extensive line up as does Panasonic.  I have been using Jarba 
> for years and had very good luck.  The only problem is you won't find any of 
> these that have true stereo.  You can get dual ear pieces but they will be 
> monaural not stereo.  I have copied a link to the Jarba Web Site. They claim 
> stereo but that isn't correct.  They are all monaural. You won't get stereo 
> receive along with a mic. with Bluetooth either.  For that setup you will 
> probably have to look for a Computer Gaming headset.  The list prices are 
> something that will get your attention.  The best I have been able to do is 
> to cruse eBay until something reasonable shows up.  I have been using a 
> GN9460 for about three years.  It's range is in excess of 600 feet.  Very 
> easy to interface to the rig.
> 
> http://jb.factoryoutletstore.com/cat/22458/Jabra-GN-Netcom-Wireless-Headsets.html
> 
> Ed
> K6ED
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Re: [Elecraft] KX3: transverter schematic? I have it!

[David Anderson via Elecraft]

Thanks to a kind person on this list, I have a copy of the schematic for the 
KX3 2m transverter. It is the one I recall, but have no idea where I saw it 
before. 

Please don't ask me for a copy as I don't know the status of this and don't 
want to get into any trouble with party.

I am not thinking of copying it by the way! -  I just ordered the 4m version 
and am arming myself with as much info as I can before it arrives. 

73 from David GM4JJJ

> On 27 May 2016, at 15:32, David Anderson via Elecraft 
> <elecraft@mailman.qth.net> wrote:
> 
> Is there a schematic diagram for the KX3 internal transverter series 
> available? 
> 
> I was sure I had seen one at some point in the past, perhaps it was in some 
> slide show by Elecraft when they introduced it, but I can't locate it now.
> 
> 
> 73 from David GM4JJJ
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Re: [Elecraft] KX3: transverter schematic?

[David Anderson via Elecraft]

Sorry Ken,

It is a completely different design, I know that much. For a start it is credit 
card sized and it takes the LO from the KX3 not a built in Xtal Osc. 

I may have imagined seeing the schematic or detailed block diagram in some 
presentation, but there appears to be nothing on the Elecraft site, and no 
schematic in the downloadable manual for the transverter, though it does give a 
brief written explanation of the transverter.

I am surprised that a schematic isn't included with the transverter actually.

73 from David GM4JJJ

> On 27 May 2016, at 17:00, Ken Arck <k...@arcomcontrollers.com> wrote:
> 
> 
> Hi David
> 
> As I said, unless it's changed since the K3..
> 
> (I'm not sure it has)
> 
> Ken
> 
> At 08:54 AM 5/27/2016, David Anderson wrote:
>> Sorry Ken, that appears to be the K3 not KX3.
>> 
>> 73 from David GM4JJJ
>> 
>> > On 27 May 2016, at 16:06, Ken Arck <k...@arcomcontrollers.com> wrote:
>> >
>> > Unless it's changed since the K3s came out:
>> >
>> > http://www.elecraft.com/manual/K3_Schematics_Jun_2010.pdf
>> >
>> > Ken
>> >
>> >
>> > At 07:32 AM 5/27/2016, David Anderson via Elecraft wrote:
>> >> Is there a schematic diagram for the KX3 internal transverter series 
>> >> available?
>> >>
>> >> I was sure I had seen one at some point in the past, perhaps it was in 
>> >> some slide show by Elecraft when they introduced it, but I can't locate 
>> >> it now.
>> >>
>> >>
>> >> 73 from David GM4JJJ
>> >> __
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>> >
>> > --
>> > President and CTO - Arcom Communications
>> > Makers of repeater controllers and accessories.
>> > http://www.arcomcontrollers.com/
>> > Authorized Dealers for Kenwood and Telewave and
>> > we offer complete repeater packages!
>> > AH6LE/R - IRLP Node 3000
>> > http://www.irlp.net
>> > "We don't just make 'em. We use 'em!"
>> >
>> > __
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> 
> --
> President and CTO - Arcom Communications
> Makers of repeater controllers and accessories.
> http://www.arcomcontrollers.com/
> Authorized Dealers for Kenwood and Telewave and
> we offer complete repeater packages!
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> http://www.irlp.net
> "We don't just make 'em. We use 'em!"
> 

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Re: [Elecraft] KX3: transverter schematic?

[David Anderson via Elecraft]

Sorry Ken, that appears to be the K3 not KX3.

73 from David GM4JJJ

> On 27 May 2016, at 16:06, Ken Arck <k...@arcomcontrollers.com> wrote:
> 
> Unless it's changed since the K3s came out:
> 
> http://www.elecraft.com/manual/K3_Schematics_Jun_2010.pdf
> 
> Ken
> 
> 
> At 07:32 AM 5/27/2016, David Anderson via Elecraft wrote:
>> Is there a schematic diagram for the KX3 internal transverter series 
>> available?
>> 
>> I was sure I had seen one at some point in the past, perhaps it was in some 
>> slide show by Elecraft when they introduced it, but I can't locate it now.
>> 
>> 
>> 73 from David GM4JJJ
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> Makers of repeater controllers and accessories.
> http://www.arcomcontrollers.com/
> Authorized Dealers for Kenwood and Telewave and
> we offer complete repeater packages!
> AH6LE/R - IRLP Node 3000
> http://www.irlp.net
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> 
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[Elecraft] KX3: transverter schematic?

[David Anderson via Elecraft]

Is there a schematic diagram for the KX3 internal transverter series available? 

I was sure I had seen one at some point in the past, perhaps it was in some 
slide show by Elecraft when they introduced it, but I can't locate it now.


73 from David GM4JJJ
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[Elecraft] KX3: 4m transverter enabling DC on SMA ?

[David Anderson via Elecraft]

I read in the FAQ for the transverter

http://www.elecraft.com/manual/KX3-2M%20FAQ.htm

Q:  Does the module provide a DC signal at the antenna jack for external 
switching functions? 
 
A:  Yes. We're adding a menu entry to control this. When the signal is turned 
on, 5 volts (through a 4-kohm series resistor) is applied to the SMA jack. This 
can be used to control external devices such as a higher-band transverter, 
amplifier, or antenna switch.

Has this been done, and if so what is the menu item I am looking for?

73 from David GM4JJJ
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Re: [Elecraft] Hooking 2 headsets to K3S

[David Anderson via Elecraft]

Another user of the HA400, very useful with the KX3 for setting levels to the 
soundcard and the headphones and the powered stereo speakers. 

73 from David GM4JJJ

> On 26 May 2016, at 17:04, J.K. Hooper  wrote:
> 
> I bought a Behringer Microamp HA400 that I use at Field Day.   No, a stereo Y 
> cable did not do the trick.   Having separate audio controls for the two 
> listeners is important - without it, someone is always complaining of too 
> loud or too soft.
> 
> Hoop
> K9QJS 
> San Juan Island, WA 
> 
> 
> On May 26, 2016, at 8:50 AM, Doug Kingston  wrote:
> 
> What is the recommended way to hook 2 headsets to a K3S?  Is a stereo "Y"
> cable sufficient?
> 
> -Doug-
> KD7DK
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Re: [Elecraft] Headset

[David Anderson via Elecraft]

Another vote for the KOSS SB45, especially as it is much easier to buy in the 
UK.

I had a CM500 but the mic broke after about a year, so I kept it just as a pair 
of stereo headphones.

73 from David GM4JJJ

> On 26 May 2016, at 17:06, John  wrote:
> 
> I use the KOSS SB45, it has the same electret element as in the Yamaha. In 
> fact
> it is almost identical to the Yamaha, but uses silver ear cups. I understand 
> some
> of the components used in the Yamaha are made by Koss…perhaps the CM500
> is made in the Koss factory, but labeled Yamaha ?
> Terrific RX and TX audio with my KX3 and Flex rigs using my Koss SB45 - make 
> sure
> you get the SB45 (electret) and not the SB40 (dynamic)
> 
> 73
> John
> 
> 
> 
> 
> 
> On 26 May 2016, at 4:14 PM, Mike Harris  wrote:
> 
> Hi,
> 
> If I remember correctly the Koss SB45 headset has been offered as a suitable 
> substitute for the K3 weapon of choice the Yamaha CM500. Any experience out 
> there?
> 
> My much used CM500 are starting to shed the leatherette covering and the foam 
> inside the cavities is wearing away. CM500 can be rather difficult to source.
> 
> Regards,
> 
> Mike VP8NO
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Re: [Elecraft] OT: Wireless stereo headset recommendations

[David Anderson via Elecraft]

Thanks,

I don't have Ethernet in my shack though. Just Wifi. 

Surely someone must make a bidirectional wireless headset at under $80?

73 from David GM4JJJ

> On 25 May 2016, at 21:28, Jwahar Bammi  wrote:
> 
> David,
> Can recommend that you look at the PigRemote from Pignology, on their website 
> and several videos on youtube about details
> 
> http://pignology.net/pigremote/
> 
> 73 de kc1ccr
> -- 
> 
>> I am thinking about adding a wireless stereo headset to my KX3 so that I can 
>> operate remotely from other parts of my house. I don't want a>Bluetooth 
>> headset as the range is fairly short. There are other wireless headsets that 
>> use UHF I believe that have a much better range.
> 
>> 
> 
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Re: [Elecraft] OT: Wireless stereo headset recommendations

[David Anderson via Elecraft]

Thanks both. 

I am looking for something that does stereo headphones as well as microphone 
but not Bluetooth, probably 868 MHz or something like that. I can find plenty 
that use USB or optical or use Bluetooth, but have not found exactly what I  
need yet. 

Closest is a mono wireless speaker mic for CB which even has PTT. Not sure 
about though ...

I will check out the Jabra now. 

David Anderson GM4JJJ


> On 25 May 2016, at 18:57, Mel Farrer via Elecraft <elecraft@mailman.qth.net> 
> wrote:
> 
> Don't forget to look at the Jabra GN9350.  Has a great reputation and I use 
> it on my K3 300'+ range.
> Mel, K6KBE
> 
> 
>  From: Jim Brown <j...@audiosystemsgroup.com>
> To: elecraft@mailman.qth.net 
> Sent: Wednesday, May 25, 2016 10:18 AM
> Subject: Re: [Elecraft] OT: Wireless stereo headset recommendations
> 
>> On Wed,5/25/2016 5:50 AM, David Anderson via Elecraft wrote:
>> I am thinking about adding a wireless stereo headset to my KX3 so that I can 
>> operate remotely from other parts of my house.
> 
> Here are a few RF-based pro audio products designed for use by musicians 
> for live performance monitoring.
> 
>   http://www.fullcompass.com/prod/193303-Galaxy-Audio-AS-WSS11T
> 
> http://www.fullcompass.com/prod/150074-Galaxy-Audio-AS-900
> 
> http://www.fullcompass.com/category/Wireless-In-Ear-Monitors-Complete-Systems.html?rewrite_name=Wireless-In-Ear-Monitors-Complete-Systems=1=Price-Low=24=Grid
> 
> Full Compass is a well-respected audio vendor, and Galaxy is a small but 
> respected US-based pro audio mfr. Shure, Audio-Technica, AKG, and 
> Sennheiser are all good, big pro audio companies.
> 
> 73, Jim K9YC
> 
> 
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[Elecraft] OT: Wireless stereo headset recommendations

[David Anderson via Elecraft]

I am thinking about adding a wireless stereo headset to my KX3 so that I can 
operate remotely from other parts of my house. I don't want a Bluetooth headset 
as the range is fairly short. There are other wireless headsets that use UHF I 
believe that have a much better range.

It would be nice to have a microphone so that I can transmit (using VOX). 

I can change frequency etc already buy using my iPad and VNC looking at my SDR 
on my PC (HDSDR on a SDRPlay on my IF) which can via Omnirig change the 
frequency of the KX3. All I lack is the audio, and wireless stereo headset 
would seem to solve that.

I was speaking to a ham in Wales today who used a Sony wireless headphone to at 
least listen to his radio from outside the shack (so he can hear if a sporadic 
E opening is happening). That put the idea into my head.

I have looked at the Sony website, but am more confused than ever. Many 
headsets refer to PlayStations which I confess to knowing nothing at all about, 
but appear to connect via USB to the wireless transceiver. I don't want that, I 
want a couple of jack plugs Mic and headset into the transceiver.

Any recommendations?

73 from David GM4JJJ
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Re: [Elecraft] KX2 Satellite Derivative? (Was: Re: The KX2)

[David Anderson via Elecraft]

The Europeans have produced the FunCube dongle and the SDRPLay. I wouldn't be 
surprised to see the Chinese producing something as they are launching more 
satellites than anyone else just now.

For many most of the fun with satellites is building up the gear and antenna 
tracking, playing with the software, and not buying a do it all box and just 
working people, that gets boring quickly. It was more useful when we had high 
orbit birds, then it was a way of chatting to people on another continent about 
technical matters with almost no QRM for an hour or so. That has largely been 
replaced by the Internet. 

73 from David GM4JJJ

> On 25 May 2016, at 13:05, brian  wrote:
> 
> I should be the last person on earth to comment on this.
> 
> If there is such a large market in EU then it suggests that an EU 
> manufacturer ought to be the source. Why hasn't that happened?
> 
> One factor missing from your 1000 estimate is the fraction that are likely to 
> buy.  Clearly active stations already have their own gear.
> 
> My experience with satellites is minimal. 1000 contacts.  The trouble was 
> that represented less than 50 different stations.  The novelty quickly died.  
> Haven't been back since.
> 
> 73 de Brian/K3KO
> 
>> On 5/25/2016 4:38 AM, Edward R Cole wrote:
>> There are about 1500-2000 hams active on 2m-eme worldwide; probably
>> another 1000 on other bands on eme.
>> VHF+ is huge in EU with contests every month and literally hundreds of
>> stations working on 10-GHz in the UK and EU.
>> 2m is the most used IF for mw.
>> 
>> On VHF and UHF up to 1296 there are probably five times as many active
>> hams as in the US.  A radio as I described would be well received by
>> this segment of ham radio.
>> 
>> Would 1,000 ordered the first month be adequate?
>> 
>> 73, Ed - KL7UW
>> PS: you would be surprised how many KX3 are in use as IF for VHF and
>> higher bands.  KX2 will probably see some of this use as well.
>> 
>> Date: Tue, 24 May 2016 15:16:38 -0700
>> From: Phil Wheeler 
>> To: elecraft@mailman.qth.net
>> Subject: Re: [Elecraft] KX2 Satellite Derivative? (Was: Re: The KX2)
>> Message-ID: <7f140668-ae11-ec14-9ac4-91a72a13a...@socal.rr.com>
>> Content-Type: text/plain; charset=windows-1252; format=flowed
>> 
>> Ed, re "Who will build it?": It seems the market
>> must be large enough to justify the investment. I
>> wonder if it really is?
>> 
>> 73, Phil W7OX
>> 
>> 
>> 
>> 73, Ed - KL7UW
>> http://www.kl7uw.com
>>   "Kits made by KL7UW"
>> Dubus Mag business:
>>   dubus...@gmail.com
>> 
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Re: [Elecraft] KX2 Satellite Derivative? (Was: Re: The KX2)

[David Anderson via Elecraft]

That is the point yes.

I wasn't saying it wasn't.

Excuse my previous comments which came across as confrontational, they weren't 
meant to be and my only excuse is lack of coffee ;-) I was merely outlining my 
thoughts which may be in agreement with what has already been said by others.

I use the KX3 with external transverter for TX and an SDRPlay for receive.

The point is there are many ways to skin a cat, and we have excellent cheap SDR 
receivers now which combined with any transmitter you have will accomplish what 
we need for the existing LEO linear transponders.

Like Ed KL7UW, I also have an FT-736R which I picked up a few years ago when 
nobody wanted them as they thought the FT-847 was a better radio because it was 
newer.  The FT-736R has a much cleaner transmitter (can be improved further 
with some simple mods), lacks a few important things like transmit inhibit for 
use with sequencers, and has a poor 435 MHz receiver in terms of strong signal 
handling. The 23cm modules are like rocking horse s**t to find though :-( but 
despite all that I am hanging on to mine as a backup rig and occasional 
satellite use.

First we need the sats, and until then the manufacturers are not going to pull 
the trigger on an all in one VHF/UHF satellite box I fear. So the easiest 
option -now- for many who want to get their feet wet is a cheap wideband SDR 
receiver combined with any multi mode transmitter old or new. 

Many of the young new hams who are going to be interested in cube sats just 
don't have much money to spend unlike the relatively rich retired hams on this 
list, myself included. They will go for new technology which they can put 
together themselves, SDR dongles, Raspberry Pi, Etc. At a fraction of the cost 
of the cheapest all in one duplex box. They are the future of the hobby, and 
will have entirely different ideas than we old timers. This is a good thing.

Similar things happened with the pacsats where many used old CB transceivers as 
their IF for Transverters to get PSK or FSK modems going for store and forward 
sats. Experimentation with cheap gear repurposed was the order of the day for 
many.  

The Icom 7300 with built in touch panoramic display points the way forward for 
all manufacturers, in a couple of generations we will have higher frequency 
versions with multiple receivers. If the 7300 had transverter facilities I 
might even have tried one, the price is right I feel.  But I have no interest 
in a radio that only goes up to 70 MHz. I never operate below 50 MHz. 

I still love the KX3 which is my main transceiver for VHF, using an external 
transverter on 2m, building one for 70cm, and just bought a used 4m internal 
transverter for it which should do me for now. It isn't ideal as Elecraft 
didn't put in a transverter socket, but there are ways round it, a lot of 
switch boxes are required to route audio on receive and transmit for digital 
and SSB, and a frequency decoder on the RS-232 is needed to route RF and PTT 
send to the appropriate transverter.  

Perhaps a future KX4 might be less of a field radio and more of a shack radio 
so that less clutter is needed in the shack. 

I didn't go for a K3 or K3S as the KX3 does nearly everything I need and I feel 
that a new generation SDR radio must be coming along, so I will wait and see 
what happens. 

73 from David GM4JJJ

> On 25 May 2016, at 11:01, Andy McMullin <a...@rickham.net> wrote:
> 
> But isn't that the point? 
> 
> The KXn family ARE SDR, with I and Q outputs ready for excellent pandapter 
> display with the PXn. 
> 
> Just want VHF/UHF instead of HF and it's all there. 
> 
> Andy, G8TQH
> 
> Sent from my iPhone
> 
>> On 25 May 2016, at 09:43, David Anderson via Elecraft 
>> <elecraft@mailman.qth.net> wrote:
>> 
>> When I was active on the linear transponders of AO6 through to AO13 I never 
>> used a satellite duplex radio, always separates. We had much better 
>> satellites then, in decent orbits like AO-10. So Yaesu in particular brought 
>> out lovely expensive duplex radios. Great! However then the linear sats 
>> gradually died and were replaced by digital radio sats. Some FM one channel 
>> toy sats, but nothing like the old wide linear transponders.
>> 
>> Only recently with FunCube and the Chinese Sats have we started to get 
>> linear voice transponders back, but again in low fast moving orbits.
>> 
>> Many are now making use of SDR dongles or other SDR receivers as their 
>> receiver for sats, because they have many advantages over the old way of 
>> just being able to listen to your own receive channel. With an SDR and 
>> panoramic can see all of the passband of the transponder or transponders on 
>> multiple satellites at once. You can point and click on a signal of 
>> interest. Record the whole pass and play it back and see

Re: [Elecraft] KX2 Satellite Derivative? (Was: Re: The KX2)

[David Anderson via Elecraft]

When I was active on the linear transponders of AO6 through to AO13 I never 
used a satellite duplex radio, always separates. We had much better satellites 
then, in decent orbits like AO-10. So Yaesu in particular brought out lovely 
expensive duplex radios. Great! However then the linear sats gradually died and 
were replaced by digital radio sats. Some FM one channel toy sats, but nothing 
like the old wide linear transponders.

Only recently with FunCube and the Chinese Sats have we started to get linear 
voice transponders back, but again in low fast moving orbits.

Many are now making use of SDR dongles or other SDR receivers as their receiver 
for sats, because they have many advantages over the old way of just being able 
to listen to your own receive channel. With an SDR and panoramic can see all of 
the passband of the transponder or transponders on multiple satellites at once. 
You can point and click on a signal of interest. Record the whole pass and play 
it back and see who you missed in the very short pass.   You can run the SDR on 
a tablet computer in the field, and have more capability than your old FT-736R 
of olden days.

In short, until we have high orbit transponders on VHF UHF like AO-10/13 no 
manufacturer is going to produce an FT-736R replacement. Any plans for a 
geostationary satellite would not use VHF UHF, but microwave to get the 
bandwidth required for a third of the world trying to access it at one time all 
the time.

Things have moved on, a single duplex box isn't what is needed.  A transmitter 
CAT coupled to an SDR panoramic receiver is much better. Point on the screen on 
the signal you see and with Doppler corrected software set the transmitter you 
have via CAT to the uplink frequency. It is also magnitudes cheaper. 


73 from David GM4JJJ
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Re: [Elecraft] Travel Case for K3/s KX3

[David Anderson via Elecraft]

I was lucky to get one of these messenger bags when they were available. 
Absolutely perfect for the KX3 with accessories. The thing it is almost 
identical apart from logo to the National Geographic messenger bag, but a 
quarter of the price as it doesn't have the branding.

https://www.7dayshop.com/products/7dayshop-canvas-photographers-messenger-shoulder-bag-removable-interior-and-rain-cover-included-DS-014

I recommended one to a ham in France and he was also delighted with it and was 
going to get another for his camera gear.


73 from David GM4JJJ

> On 18 May 2016, at 00:38, Phil Wheeler  wrote:
> 
> My KX3 travel case is a LowePro camera case I happened to have for a camera 
> system I sold, the Nova 170 AW. My current camera system fits in my second 
> Nova 170 AW :-)
> 
> http://www.amazon.com/Lowepro-Nova-DSLR-Camera-Shoulder/dp/B0016J1EAY?ie=UTF8=lowepro%20nova%20170aw=1463527880_=sr_1_2=8-2
> 
> The KX3 fits in vertically and perfectly. It also holds antenna, paddle, a 
> small brick power supply, a 6 A-hr Li-ion battery I have etc.  I've not tried 
> to fit the PX3 in this case yet.
> 
> Well padded, has a water-proof cover, etc. Fits like it was made for the KX3.
> 
> 73, Phil W7OX
> 
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Re: [Elecraft] NB issue

[David Anderson via Elecraft]

Mike,

I think Bill was alluding to my answer which on the face of it didn't make any 
sense, but what I was trying to determine was whether stray RF may have been 
doing something to the K3 NB circuitry during transmit as you suggested you 
thought the NB started to flash after transmitting, hence my suggestion to 
eliminate any possibility by using a dummy load, that's all. 

Now thanks to the group we have the correct answer, the NB annunciation legend 
can flash when the I.F. blanker setting is too high for the signals. It will 
stop flashing when transmitting and start again back on receive. 

I should have searched the electronic manual, that is what I generally do in 
iBooks on the iPad where I keep all my radio manuals. It is generally easier 
than manually searching the paper copy which is safely stored away in a file.

I don't own a K3, hence me not knowing about the significance of the flashing 
NB, I use the KX3 and find the noise blanker works very well on powerline 
noise, narrow pulses, ignition spark type noise. I would find it strange and 
disappointing if the K3's blanker was poorer than the KX3's. 

What is puzzling is that you say it electric fence pulses that the NB is 
struggling with, I would have thought that is one of the easiest things to 
blank out, a simple I.F. Blanker shouldn't have a problem with that. 

Like so many controls that give you a lot of user settings there are benefits 
and also problems, mostly the defaults are a good starting point, but changing 
too many settings at once will not help. You have to be methodical and change 
one thing at a time and see what the effect if any is.

I have used the KX3 as my main rig for more than a year and am still finding 
things about it that I didn't know. It's part of the joy.


73 from David GM4JJJ

> On 16 May 2016, at 00:06, Mike Smith VE9AA <ve...@nbnet.nb.ca> wrote:
> 
> I am not sure what you are eluding to Bill, but suffice to say I don;'t
> think you understand the issue.
> Once I have transmitted, the NB flashes and will stay flashing forever.
> (while I am sitting there receiving)
> Also, the NB seems to do little to nothing.
> 
> I am not a K3 engineer, but I am now SURE this is not how it's supposed to
> work.
> 
> I am going to crack the radio open tomorrow and see if the board has come
> loose during shipping.
> 
> Please don't anyone email me again asking me to look at the page in the
> manual concerning the NB. (I have had a number of you do that and
> even send me a copy of the page. )
> 
> I give you my word I have read it and have read it again!.  Regardless of
> settings the NB letters flash. (when invoking IF NB_)
> 
> Something is not correct :-)
> 
> Mike VE9AA
> 
> Mike, Coreen & Corey
> Keswick Ridge, NB
> 
> 
> -Original Message-
> From: Nr4c [mailto:n...@widomaker.com] 
> Sent: May 15, 2016 8:00 PM
> To: David Anderson
> Cc: Mike Smith VE9AA; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] NB issue
> 
> What effect do you expect when transmitting?  I would think "nothing" since
> NB is a Receive function. 
> 
> Sent from my iPhone
> ...nr4c. bill
> 

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Re: [Elecraft] K3 cracked control knob

[David Anderson via Elecraft]

Have a great time in Dayton Sam. Wish I could be with you!

73 from David GM4JJJ

> On 16 May 2016, at 08:24, Sam Jewell  wrote:
> 
> Apologies to all that my request went to the wrong group. I had that one down 
> as Elecraft support.
> I will probably lodge my request directly with Elecraft on Friday at Dayton. 
> No getting the wrong group then!
> 73 de Sam
> 
> 

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Re: [Elecraft] OT thread non-Elecraft Looking for 5 Pense piece

[David Anderson via Elecraft]

Gerald,

Why? Just curious? Does it have to be in mint condition?

I can pop one in an envelope with a QSL card if you like. According to the 
Royal Mail it isn't legal to send coins through the mail in the USA. I don't 
suppose a single 5p (pence) would matter though.


73 from David GM4JJJ

> On 16 May 2016, at 05:09, KC6CNN  wrote:
> 
> I am looking for a UK 5 Pense Piece. Does anyone know where I can purchase
> one?
> Thank you
> Gerald - KC6CNN
> 
> 
> 
> 
> 
> -
> KC6CNN - Gerald
> K1 # 0014
> K2 # 5486
> K3 # 6294
> KX3 # 757
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/OT-thread-non-Elecraft-Looking-for-5-Pense-piece-tp7617475.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] NB issue

[David Anderson via Elecraft]

Hmmm, those NB letters are not supposed to flash. They should either be on or 
off. Sounds like a bad connection someplace.

To eliminate RF causing any sort of problem, please try transmitting into a 
dummy load.

73 from David GM4JJJ

> On 15 May 2016, at 23:14, Mike Smith VE9AA  wrote:
> 
> Regardless of the dozen or whatever choices and any other setting on the
> radio be it mode, width, gain, whatever, the NB letters themselves will
> flash once I transmit a couple times.

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Re: [Elecraft] Dead K3

[David Anderson via Elecraft]

Hi Todd,

Has there been a power cut? 

No seriously, check if your rig is getting power OK. 

Always start at the Power Station and work your way forward.

Check connectors and fuses.

73 from David GM4JJJ

> On 15 May 2016, at 23:05, todd ruby  wrote:
> 
> This is a new and disturbing issue. I had just made 2 contacts one to Congo 
> on CW on 15 one to Serbia on SSB on 20 and I was just monitoring a station 
> and reading something when all of a sudden his signal went silent and I had 
> no output power whatsoever! I did not touch the radio at all, it just went 
> dead on xmit and rx. 
> 
> Does anyone have any idea what has happened?
> 
> thanks in advance
> 
> todd
> 
> WB2ZAB
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Re: [Elecraft] KX3 setting up digital

[David Anderson via Elecraft]

Bill,

I was certain I read that mic bias was off on DATA, but now am not so sure as I 
cannot find reference to it. Perhaps I stumped because it isn't adjustable that 
it isn't on. So don't take my word for it. Perhaps I was thinking about other 
parameters like TX equalisation or mic button tuning or something like that. 

73 from David GM4JJJ

> On 8 May 2016, at 18:51, David Anderson via Elecraft 
> <elecraft@mailman.qth.net> wrote:
> 
> BIll,
> 
> I believe that in Data mode, the bias if switched on in SSB is automatically 
> switched off.
> 
> You are right about point 1, that tripped up a lot of people, including 
> your's truly.
> 
> 73 from David GM4JJJ
> 
>> On 8 May 2016, at 15:46, Bill Frantz <fra...@pwpconsult.com> wrote:
>> 
>> I had to set up my KX3 for digital operation with a SignaLink USB from 
>> scratch again, and I had to learn the same "features" which tripped me up 
>> the last time over again the hard way. I'm documenting them here in hopes I 
>> won't forget them the next time. (I'm also writing them on a file card to 
>> keep with the radio.)
>> 
>> (1) High levels of Mic input show up as zero signal. The fix is to always 
>> start from 0 and move slowly up in levels. Mic level 5 seems to be about 
>> right for my setup.
>> 
>> (2) You can't be in a digital mode (DATA A etc.) and turn off mic bias. All 
>> you get is N/A. It seems to be a poor idea to DC bias the isolation 
>> transformers in the SignaLink, so you really need it off. And of course, 
>> voice modes won't work until you turn mic bias back on again.
>> 
>> In an ideal world, the level, bias, and VOX settings would be saved 
>> separately for Data and Voice modes. (And the radio would recognize that mic 
>> input settings need to be made in data modes.)
>> 
>> But the results are worth it. From New Hampshire, I've been able to work 14 
>> DXCCs including an ATNO. I also had a long rag chew with AE5ZA in Texas, all 
>> on 20M PSK31/63 with only a few hours of operating.
>> 
>> 73 Bill AE6JV
>> 
>> ---
>> Bill Frantz|"We used to quip that "password" is the most common
>> 408-356-8506   | password. Now it's 'password1.' Who said users haven't
>> www.pwpconsult.com | learned anything about security?" -- Bruce Schneier
>> 
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Re: [Elecraft] Kx3 and 2M

[David Anderson via Elecraft]

What mode SSB or FM?

73 from David GM4JJJ

> On 8 May 2016, at 19:23, Patrick Luke  wrote:
> 
> I have a KX3 with the 2M and atu options installed and a mirage dual band
> 2M/440amp connected.
> 
> The issue is that the 2M signal/voice seem clipped if they are strong'ish
> 
> it was working beautiful then not so much..
> 
> same issue with out the linear attached.
> The external antenna seems to be working nicely with my HT with no issues.
> 
> I've been playing with the radio quite alot so I'm certain it's something I
> have messed up.
> 
> any thoughts?
> -- 
> Patrick Luke
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Re: [Elecraft] KX3 setting up digital

[David Anderson via Elecraft]

BIll,

I believe that in Data mode, the bias if switched on in SSB is automatically 
switched off.

You are right about point 1, that tripped up a lot of people, including your's 
truly.

73 from David GM4JJJ

> On 8 May 2016, at 15:46, Bill Frantz  wrote:
> 
> I had to set up my KX3 for digital operation with a SignaLink USB from 
> scratch again, and I had to learn the same "features" which tripped me up the 
> last time over again the hard way. I'm documenting them here in hopes I won't 
> forget them the next time. (I'm also writing them on a file card to keep with 
> the radio.)
> 
> (1) High levels of Mic input show up as zero signal. The fix is to always 
> start from 0 and move slowly up in levels. Mic level 5 seems to be about 
> right for my setup.
> 
> (2) You can't be in a digital mode (DATA A etc.) and turn off mic bias. All 
> you get is N/A. It seems to be a poor idea to DC bias the isolation 
> transformers in the SignaLink, so you really need it off. And of course, 
> voice modes won't work until you turn mic bias back on again.
> 
> In an ideal world, the level, bias, and VOX settings would be saved 
> separately for Data and Voice modes. (And the radio would recognize that mic 
> input settings need to be made in data modes.)
> 
> But the results are worth it. From New Hampshire, I've been able to work 14 
> DXCCs including an ATNO. I also had a long rag chew with AE5ZA in Texas, all 
> on 20M PSK31/63 with only a few hours of operating.
> 
> 73 Bill AE6JV
> 
> ---
> Bill Frantz|"We used to quip that "password" is the most common
> 408-356-8506   | password. Now it's 'password1.' Who said users haven't
> www.pwpconsult.com | learned anything about security?" -- Bruce Schneier
> 
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Re: [Elecraft] TX Noise Gate on KX3 kills VOX delay setting

[David Anderson via Elecraft]

Thanks Michael, let us know when you hear anything back from them.

I wonder if the same thing happens with a K3? 

73 from David GM4JJJ

> On 2 May 2016, at 18:41, Michael Blake  wrote:
> 
> I only received two customer responses and they both confirmed what I am 
> seeing on my KX3.  I have forwarded the issue as a “bug” to Elecraft support.
> 
> Michael Blake
> k9...@mac.com 
> 
> 
> 
> 
> 
> 
>> On Apr 30, 2016, at 10:36 AM, Michael Blake  wrote:
>> 
>> Has anyone else noticed this TX Noise Gate versus VOX Delay setting 
>> interaction?
>> 
>> Michael Blake
>> k9...@mac.com 
>> 
>> 
>> 
>> 
>> 
>> 
>>> On Apr 29, 2016, at 7:08 PM, Michael Blake  wrote:
>>> 
>>> When the TX Noise Gate is set to “On” with any gate level more than “00” 
>>> the VOX delay setting is ignored and the VOX drops out immediately.  Is 
>>> this by design?
>>> 
>>> I am using MCU version 2.34 and DSP version 1.33
>>> 
>>> Michael Blake
>>> k9...@mac.com 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
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Re: [Elecraft] TX Noise Gate on KX3 kills VOX delay setting

[David Anderson via Elecraft]

Yes I noticed this a while ago. I never use VOX on SSB, but I do use the noise 
gate which is excellent. I consider it a bug I must say.

Another gotcha is if you have SSB+CW ON and VOX is OFF, the Keyer will key the 
amplifier Keyline out at the CW rate! 

73 from David GM4JJJ

> On 30 Apr 2016, at 15:36, Michael Blake  wrote:
> 
> Has anyone else noticed this TX Noise Gate versus VOX Delay setting 
> interaction?
> 
> Michael Blake
> k9...@mac.com 
> 
> 
> 
> 
> 
> 
>> On Apr 29, 2016, at 7:08 PM, Michael Blake  wrote:
>> 
>> When the TX Noise Gate is set to “On” with any gate level more than “00” the 
>> VOX delay setting is ignored and the VOX drops out immediately.  Is this by 
>> design?
>> 
>> I am using MCU version 2.34 and DSP version 1.33
>> 
>> Michael Blake
>> k9...@mac.com 
>> 
>> 
>> 
>> 
>> 
>> 
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Re: [Elecraft] KX3 - How to enable RF output meter? Stuck in ALC display

[David Anderson via Elecraft]

Hi David,

I use SSB+CW all the time here, as it is so useful to be an,e to use the rig on 
SSB and just hit the key to transmit CW. Sorry my explanation was a big wordy, 
but it is possible to use SSB+CW and
you can switch to DATA mode then change meter scales between ALC and RF by 
tapping Keyer/mic knob then go back to SSB.

It's one of the most non intuitive features of the KX3 and I always have to 
refer to my notes each time this comes up.

73 from David GM4JJJ

> On 26 Apr 2016, at 21:06, David Orman <orma...@corenode.com> wrote:
> 
> Perfect, I'm positive I have SSB+CW enabled right now. I'll go disable and 
> test again. Thank you so much for the quick answer!
> 
> Respectfully,
> David
> 
>> On Tue, Apr 26, 2016 at 12:58 PM, David Anderson <gm4...@yahoo.co.uk> wrote:
>> David,
>> 
>> This happens when SSB + CW is enabled.  In CW WGHT menu tap 1 to toggle 
>> between SSB+CW (enabled) and SSB -  CW
>> 
>> Tapping Keyer/Mic knob toggles between Keyer speed and Mic Gain rather than 
>> Meter Scales  CMP/ALC and SWR/RF. The CMP/ALC scale is still shown 
>> temporarily when CMP or Mic Gain are adjusted.
>> 
>> You can switch to DATA mode then change meter scales by tapping Keyer/mic 
>> knob then go back to SSB.
>> 
>> 
>> 73 from David GM4JJJ
>> 
>> > On 26 Apr 2016, at 16:54, David Orman <orma...@corenode.com> wrote:
>> >
>> > Hi,
>> >
>> > I tried tapping the keyer/mic button to change the display to RF output
>> > from ALC while in USB and LSB modes, and it doesn't switch over. I seem to
>> > remember this working before. I am on the latest firmware. Is there a trick
>> > to this I'm missing?
>> >
>> > Thank you,
>> > David
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Re: [Elecraft] KX3 - How to enable RF output meter? Stuck in ALC display

[David Anderson via Elecraft]

David,

This happens when SSB + CW is enabled.  In CW WGHT menu tap 1 to toggle between 
SSB+CW (enabled) and SSB -  CW

Tapping Keyer/Mic knob toggles between Keyer speed and Mic Gain rather than 
Meter Scales  CMP/ALC and SWR/RF. The CMP/ALC scale is still shown temporarily 
when CMP or Mic Gain are adjusted.

You can switch to DATA mode then change meter scales by tapping Keyer/mic knob 
then go back to SSB. 


73 from David GM4JJJ

> On 26 Apr 2016, at 16:54, David Orman  wrote:
> 
> Hi,
> 
> I tried tapping the keyer/mic button to change the display to RF output
> from ALC while in USB and LSB modes, and it doesn't switch over. I seem to
> remember this working before. I am on the latest firmware. Is there a trick
> to this I'm missing?
> 
> Thank you,
> David
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Re: [Elecraft] KX3 CW Msg send

[David Anderson via Elecraft]

Barry,

You can set the KX3 up for single button message send. 

* FAST MESSAGE PLAY: A long-hold of MSG (~3 sec) puts the KX3 into FAST PLAY 
mode. In this mode, the BAND+, BAND-, and FREQ_ENT switches can be used to 
play/repeat messages 1, 2, and 3 immediately, without the need to first tap 
MSG. To turn off fast play, hold MSG for ~3 seconds again, or turn the KX3 off 
and back on. Notes: (1) In voice modes (using the built-in DVR), only messages 
1 and 2 are available, corresponding to BAND+ and BAND- in fast-play. (2) At 
present, message chaining is only available in CW modes (with both normal and 
fast-play).




73 from David GM4JJJ

> On 25 Apr 2016, at 12:27, Barry N1EU  wrote:
> 
> After spending 7 hours operating in QRPTTF on Saturday with my KX3, I wish
> for 2 things:
> 
> 1. Single button press to send cw message instead of two
> 2. When in message repeat mode, allow for a single paddle dit to silently
> terminate repeat mode (without actually transmitting or generating
> sidetone).  This would allow you to copy someone answering your CQ without
> missing a beat.
> 
> 73, Barry N1EU
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Re: [Elecraft] What's best Soundcard Interface for KX3

[David Anderson via Elecraft]

George, check that Data is set to DATA A. (Change it using the VFO B knob). 
Also widen the filter passband when in DATA mode and it should work. Also make 
sure that you have DATA A set to USB and not LSB ( Hold ALT to change it from 
one to the other). There are advantages in DATA rather than USB for digital 
modes, especially on transmit as mic TX equalisation and compression are 
automatically disabled on DATA. 

73 from David GM4JJJ

> On 11 Apr 2016, at 00:58, George_yv5wz  wrote:
> 
> Hey Robert
> 
> 
> Yes I think I'm ok with my Sony VPCW12AX.probably is cause better sound
> device than laptop  hahahaha..
> 
> I have WSJT-X  v1.6.0 r6263
> 
> What are the settings for VOX?  
> 
> By the way my software decode with KX3 set at USB I couldn't get any
> decode set at DATA
> 
> 
> 73's
> 
> 
> 
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/What-s-best-Soundcard-Interface-for-KX3-tp7616157p7616188.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] Stripping toroid leads

[David Anderson via Elecraft]

I seem to recall they could produce cyanide fumes. Best to use good ventilation 
and a fume extractor fan with filter if you are doing a lot of them. I like the 
smell of solder flux, but after reading about the health problems they can 
cause I invested in a fume extractor here.

73 from David GM4JJJ

> On 6 Apr 2016, at 00:08, Don Wilhelm  wrote:
> 
> Yes, the fumes from that burnt enamel are quite nasty.  I would say they are 
> more harmful than normal solder flux vapors.
> 
> 73,
> Don W3FPR
> 
>> On 4/5/2016 6:58 PM, Dauer, Edward wrote:
>> The ³Blob Method² worked well for me in building the K2 (and now the K1);
>> but it might be important not to inhale.
>> 
>> At the time I looked into what¹s in the fumes when both the solder and the
>> enamel coating on the wire are smoking.  While I don¹t know exactly what
>> the coating is on the particular wire supplied by Elecraft, in general
>> when it¹s vaporized the coating is vile stuff.  I set a fan on the
>> workbench to direct the fumes away from my face; and I still held my
>> breath for each winding leg.  Makes it useful to learn how to do a fast
>> Blob Strip.
>> 
>> Ted, KN1CBR
>> 
>> 
>>> Message: 11
>>> Date: Mon, 4 Apr 2016 22:32:59 -0400
>>> From: Don Wilhelm 
>>> To: lstavenhagen , elecraft@mailman.qth.net
>>> Subject: Re: [Elecraft] K1 (still) a classic!
>>> Message-ID: <570323db.5090...@embarqmail.com>
>>> Content-Type: text/plain; charset=windows-1252; format=flowed
>>> 
>>> LS,
>>> 
>>> There is a "secret" to soldering the grounding wires to the base of the
>>> crystals.
>>> . . .
>>> 
>>> It is easier for me than stripping and tinning toroid leads.
>>> 
>>> 73,
>>> Don W3FPR
> 
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Re: [Elecraft] KX3 anomaly, birdie transmitted

[David Anderson]

Hi John,

That is normal, as the KX3 is a direct conversion receiver and the LO can 
radiate through the antenna, however to reduce this Elecraft have put in an 
isolation preamp which you can enable and should reduce the level of this. Try 
changing  RX ISO to ON in the KX3 menu.

73 from David GM4JJJ

> On 17 Mar 2016, at 02:20, John Kramer  wrote:
> 
> I have a newish KX3 factory built. I just noticed something odd with my KX3. 
> I usually use my
> KX3 for portable use so its not often in the shack, but yesterday I had my 
> Flex radio’s 
> connected to my SteppIR beam on 15, and I hooked up my KX3 to an EFHW wire 
> which is about 100 ft away from my SteppIR. 
> With both the Flex and the KX3 in receive mode on 15 meters, I noticed on the 
> Panafall
> display of my Flex rig, that my KX3 is transmitting a birdie about 700 Hz 
> below it’s RX frequency. 
> When I turn the dial on the KX3 I can see it moving up and down the band on 
> my Flex radio. It is quite
> strong, about 70 dBm.
> 
> Is this normal ? for the KX3 to put out a “birdie” 700 hertz below it’s 
> displayed RX frequency ?
> 
> 73
> John, ZS5J
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Re: [Elecraft] 10 MHz external reference - GPSDO

[David Anderson]

Hi Oli,

I agree it looks like there is no point in paying for the TCXO-3 if you have a 
reliable constantly available 10 MHz external reference. Perhaps they recommend 
the better TCXO as a better fallback if for any reason the external ref is not 
available, I can't think of any other reason for it.

73 from David GM4JJJ

> On 13 Mar 2016, at 09:27, Oliver Dröse  wrote:
> 
> Thanks Ed.
> 
> I don't have a problem understanding how the TCXO's work. Maybe I was not 
> clear enough. ;-) Taking your example from below, having only the TCXO-1 it 
> is surely *not* drifting 140 Hz at 28 MHz within the 4 or 5 seconds of the 
> EXREF update cycle (same as the TCXO-3 will not drift by 28 Hz in that time), 
> otherwise the K3 would be a *very* crappy radio. ;-) Think you are missing 
> the time domain here. ;-)
> 
> So my question still stands: What's the real value of the TCXO-3 over the 
> TCXO-1 when using the K3EXREF? Unfortunately I do neither have the measuring 
> equipment to measure below 1 Hz drift (and I'm not seeing that amount with my 
> TCXO-1 only K3) nor a TCXO-3. So will the radio drift by 0.0014 Hz with the 
> TCXO-1 + K3EXREF within those 4 seconds and the TCXO-3 will bring it down to 
> 0.00028 Hz? Then I'm probably fine with the TCXO-1 and even the most 
> sophisticated digital modes available. ;-)
> 
> 73, Olli - DH8BQA
> 
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Re: [Elecraft] 10 MHz external reference - GPSDO

[David Anderson]

Oliver, I was wondering about this, I guess it is just that the short term 
drift is lower so it won't drift as much between frequency measurement 
corrections which are made for 1 second every 4 seconds according to some info 
recently published. I doubt it matters much though. I would be tempted to try 
it with the standard TCXO first.

Maybe someone from Elecraft would like to comment.

73 from David GM4JJJ

> On 12 Mar 2016, at 07:17, Oliver Dröse  wrote:
> 
> Why would I need the TCXO-3 instead of the TCXO-1 when using the K3EXREF if 
> the accuracy and stability is provided by the EXREF? Am I overlooking 
> something here?
> 
> Tnx & 73, Olli - DH8BQA
> 
> Contest, DX & radio projects: http://www.dh8bqa.de
> 
> 
>> Am 11.03.2016 um 22:30 schrieb Edward R Cole:
>> First one needs to realize that the TCXO establishes the basic stability, so 
>> choosing the TCXO-3 over the TCXO-1 will provide better stability and 
>> accuracy (these are two different things).  I bought the TCXO-3 with my 
>> initial K3/10 purchase so the rest of what I say is with the better TCXO-3 
>> installed (if frequency is important then that is first thing I recommend 
>> updating).
>> 
>> Mostly, I use 28-MHz as a testing frequency since it is my VHF transverter 
>> IF.  On 28-MHz with only the TCXO-3, I see 14-Hz inaccuracy.  This 
>> 14/2800 = 0.5 ppm (I think this is better than Elecraft specs the 
>> TCXO-3).  Adding the EXREF I see 2-Hz which is "about" 0.1ppm.  Measurements 
>> on 50-MHz are proportional.  I see 3-4 Hz accuracy using the EXREF.
> 
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Re: [Elecraft] 10 MHz external reference - GPSDO

[David Anderson]

I am not arguing about that calculation Joe, it's proof that you don't need 
GPSDO accuracy as if will be several orders of magnitude better than that. 

73 from David GM4JJJ

> On 11 Mar 2016, at 18:25, Joe Subich, W4TV <li...@subich.com> wrote:
> 
> 
> > While locked to the external source, the K3’s reference
> > oscillator frequency is maintained within 2 Hz.
> 
> The K3's reference oscillator is 49.380 MHz (+/-) not 10 MHz.
> 
> The K3EXTREF uses the external 10 MHz signal to gate a counter
> which counts the reference.  That count is then used to adjust
> the reference frequency.  Maintaining the 49.380 MHz reference
> +/- 2Hz is on the order
> of 0.04 ppm.
> 
> 73,
> 
>  ... Joe, W4TV
> 
> 
>> On 3/11/2016 1:07 PM, David Anderson wrote:
>> Dick,
>> 
>> I found the reference to that figure I quoted, it is in the K3EXREF
>> manual:
>> 
>> The K3EXREF option locks the K3's reference oscillator frequency to
>> an external 10 MHz source by automatically controlling the REF CAL
>> function. While locked to the external source, the K3’s reference
>> oscillator frequency is maintained within 2 Hz. Since the K3EXREF
>> does not phase lock the K3’s reference oscillator, the external 10
>> MHz source has no impact on the K3’s phase noise performance. For
>> best performance we recommend your K3 be equipped with the KTCXO3-1
>> high stability (0.5 ppm typ.) reference oscillator.
>> 
>> 
>> 73 from David GM4JJJ
>> 
>>> On 11 Mar 2016, at 16:55, Richard W. Solomon <w1...@earthlink.net>
>>> wrote:
>>> 
>>> I am a tad confused over this issue. Perhaps I need to read up on
>>> how Elecraft controls frequency.
>>> 
>>> My understanding on a "Locked" frequency would infer that the
>>> result would be a LOT closer than 2 Hz @ 10 MHz.
>>> 
>>> Is there a detailed description of the process somewhere that I
>>> could read ?
>>> 
>>> 73, Dick, W1KSZ
>> __
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Re: [Elecraft] OT noise on 17m

[David Anderson]

Coincidental I think hi. Yes Aurora on 144 MHz here this afternoon and the 
magnetometers showing the impact too.

73 from David GM4JJJ

> On 11 Mar 2016, at 19:01, KENT TRIMBLE  wrote:
> 
> Robert . . .
> 
> *Space Weather News for March 11, 
> 2016*http://spaceweather.com
>  
> 
>  *
> 
> UNEXPECTED GEOMAGNETIC STORM: *  Earlier today, the outskirts of a CME 
> previously expected to miss Earth instead /hit/. The impact sparked a 
> G2-class geomagnetic storm and bright auroras around the Arctic Circle.   At 
> the time this alert is being written, the storm is still in progress.   Visit 
> Spaceweather.com 
> 
>  for updates.
> 
> 
> 73,
> 
> Kent  K9ZTV
> 
> 
>> On 3/11/2016 8:41 AM, Robert G Strickland wrote:
>> Can someone help me understand the "noise" on 17m - and elsewhere - right 
>> now? It repeats every 17kc, very strong. Perhaps some sort of over the 
>> horizon radar? Is it general or just something in my neighborhood? Thanks 
>> much.
>> ...robert
> 
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Re: [Elecraft] 10 MHz external reference - GPSDO

[David Anderson]

Hi Dick,

There may be a little misunderstanding as to what "locked" means in this 
implementation. It isn't the same as phase locking an oscillator to a  high 
standard reference that's true.  On the other hand it is more than good enough 
for almost any HF application, and it has the huge benefit of not risking 
degrading the excellent phase noise characteristics of the K3' synthesiser.

Basically any accurate 10 MHz source (calibrated occasionally) that is 
temperature stable like an ovened crystal oscillator or a Rubidium source could 
be used for this, however many already have a GPSDO and there are plenty 
surplus ones as well as fairly inexpensive ones that would be useful for other 
purposes that can be obtained. 

Some people including myself have a thing about frequency accuracy, and it is 
easy to become over obsessive about it ;-)

I am more concerned with limiting any frequency drift so that narrowband 
digital modes are not degraded in sensitivity, especially at VHF and above. 

73 from David GM4JJJ

> On 11 Mar 2016, at 18:31, Richard W. Solomon <w1...@earthlink.net> wrote:
> 
> OK, so folks are tossing the term “locked” around without realizing it is 
> wrong.
>  
> Then all this talk of using a GPSDO is irrelevant, it will not do any good to 
> use one.
>  
> Thanks for the education.
>  
> 73, Dick, W1KSZ
>  
> From: David Anderson [mailto:gm4...@yahoo.co.uk] 
> Sent: Friday, March 11, 2016 11:07 AM
> To: Richard W. Solomon
> Cc: Elecraft@mailman.qth.net
> Subject: Re: [Elecraft] 10 MHz external reference - GPSDO
>  
> Dick,
>  
> I found the reference to that figure I quoted, it is in the K3EXREF manual:
>  
> The K3EXREF option locks the K3's reference oscillator frequency to an 
> external 10 MHz source by automatically controlling the REF CAL function. 
> While locked to the external source, the K3’s reference oscillator frequency 
> is maintained within 2 Hz. Since the K3EXREF does not phase lock the K3’s 
> reference oscillator, the external 10 MHz source has no impact on the K3’s 
> phase noise performance. For best performance we recommend your K3 be 
> equipped with the KTCXO3-1 high stability (0.5 ppm typ.) reference 
> oscillator. 
> 
> 
> 73 from David GM4JJJ
> 
> On 11 Mar 2016, at 16:55, Richard W. Solomon <w1...@earthlink.net> wrote:
> 
> I am a tad confused over this issue. Perhaps I need to read up on how
> Elecraft 
> controls frequency.
> 
> My understanding on a "Locked" frequency would infer that the result would
> be 
> a LOT closer than 2 Hz @ 10 MHz. 
> 
> Is there a detailed description of the process somewhere that I could read ?
> 
> 73, Dick, W1KSZ
> 
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Re: [Elecraft] 10 MHz external reference - GPSDO

[David Anderson]

Dick,

I found the reference to that figure I quoted, it is in the K3EXREF manual:

The K3EXREF option locks the K3's reference oscillator frequency to an external 
10 MHz source by automatically controlling the REF CAL function. While locked 
to the external source, the K3’s reference oscillator frequency is maintained 
within 2 Hz. Since the K3EXREF does not phase lock the K3’s reference 
oscillator, the external 10 MHz source has no impact on the K3’s phase noise 
performance. For best performance we recommend your K3 be equipped with the 
KTCXO3-1 high stability (0.5 ppm typ.) reference oscillator. 


73 from David GM4JJJ

> On 11 Mar 2016, at 16:55, Richard W. Solomon  wrote:
> 
> I am a tad confused over this issue. Perhaps I need to read up on how
> Elecraft 
> controls frequency.
> 
> My understanding on a "Locked" frequency would infer that the result would
> be 
> a LOT closer than 2 Hz @ 10 MHz. 
> 
> Is there a detailed description of the process somewhere that I could read ?
> 
> 73, Dick, W1KSZ
> 
> 
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Re: [Elecraft] 10 MHz external reference - GPSDO

[David Anderson]

There was a thread about this recently (last few days).

The instructions for the K3 give the spec as up to plus and minus 2Hz at 10 MHz.


73 from David GM4JJJ

> On 11 Mar 2016, at 16:55, Richard W. Solomon <w1...@earthlink.net> wrote:
> 
> I am a tad confused over this issue. Perhaps I need to read up on how
> Elecraft 
> controls frequency.
> 
> My understanding on a "Locked" frequency would infer that the result would
> be 
> a LOT closer than 2 Hz @ 10 MHz. 
> 
> Is there a detailed description of the process somewhere that I could read ?
> 
> 73, Dick, W1KSZ
> 
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David
> Anderson
> Sent: Friday, March 11, 2016 9:04 AM
> To: g...@ka1j.com
> Cc: Elecraft@mailman.qth.net
> Subject: Re: [Elecraft] 10 MHz external reference - GPSDO
> 
> You may want to have a look at this for some background on real world
> frequency stability, and remember that the K3 isn't phase locked to the
> external reference and is only going to be within 2Hz. 
> 
> https://www.febo.com/pages/stability/
> 
> 73 from David GM4JJJ
> 
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