[Elecraft] WTB 200 Hz filter for 2nd RX

[Jan Babinec]

Seriously looking for 200Hz 5pole filter with the offsetas close as possible to 
-0.9

> From: g...@ka1j.com
> To: elecraft@mailman.qth.net
> Date: Fri, 11 Mar 2016 23:42:07 -0500
> Subject: [Elecraft] WTB 400 Hz filter for K3
> 
> I have two 500 Hz filters for the K3, I'd like to try the 400 Hz 
> filters. If you have one or two 400 Hz filter(s) you want to sell or 
> would like to trade for 500 Hz, please contact me off list.
> 

  
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Re: [Elecraft] 10 MHz external reference - GPSDO

[Oliver Dröse]

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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[Elecraft] WTB 400 Hz filter for K3

[Gary Smith]

I have two 500 Hz filters for the K3, I'd like to try the 400 Hz 
filters. If you have one or two 400 Hz filter(s) you want to sell or 
would like to trade for 500 Hz, please contact me off list.

73,

Gary
KA1J
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Re: [Elecraft] Noise Reduction (NR)

[Don Wilhelm]

Jimmy,

If all noise were equal, there would be an easy answer (and no need for 
the various settings).
But the truth of the matter is that there are a huge variety of 
different noise sources - rise time, duration, settling time, amplitude, 
etc.
You will just have to experiment to find the best setting for each kind 
of noise you are dealing with at the moment.


73,
Don W3FPR

On 3/11/2016 8:35 PM, James D. (Jimmy) Walker, Jr. via Elecraft wrote:

I hope this isn’t a worn out question. I’d like to ask the group whether there 
is a favorite setting for NR? I know there are different conditions that might 
require different settings, but does anyone have a default setting?




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[Elecraft] Noise Reduction (NR)

[James D. (Jimmy) Walker, Jr. via Elecraft]

I hope this isn’t a worn out question. I’d like to ask the group whether there 
is a favorite setting for NR? I know there are different conditions that might 
require different settings, but does anyone have a default setting?

Jimmy, WA4ILO

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Re: [Elecraft] K3 Feature Request

['DGB']

Did you try turning the VOX Delay down to zero?

Worked for me when running remotely!

73 Dwight NS9I

On 3/11/2016 1:12 PM, charlie carroll wrote:

I use the internal K3 message memories when operating as DX in an ssb contest.
One of the biggest problem I face is the delay both in initiating the message 
(from an external application) and the delay between the end of the message and 
back in the receive mode.  From experiments, both of these delays seem due to 
the time between the button presses on the K3's front panel.  Granted, there 
may be some time between pushing the appropriate F key in the application 
(Wintest).  But, this only addresses possibly the initiation delay.

Could some method/application be added to upload an externally generated audio 
file, which uses some standard format, into an arbitrarily assigned message?  Or, 
at the very least, provide a means to change the K3 between receive & transmit 
without suffering the delays due to button presses?

For the curious, when running at rates of 300+ QSOs per hour, the delays turn 
out to be significant.

73 charlie, k1xx/vp2mmf

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Re: [Elecraft] 10 MHz external reference - GPSDO

[Edward R Cole]

Joe and all interested in the EXREF:

OK ... but most will not measure the 49.380 TCXO 
directly*.*though REF CAL displays this.


What I think most want to know is how accurate their operating 
frequency will be.  I performed rigorous measurements as beta tester 
of the EXREF (unfortunately my website was hacked a couple years ago 
and I did not recover the beta-testing data page).


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.


So going lower to 10-MHz I measure 1-Hz or less inaccuracy.  Due to 
the slow drift of the TCXO's, stability is same as accuracy (or maybe 
better).  So all ham bands lower than 10-MHz show less than 1-Hz 
(basically I measure zero error).


Read below for optional background in my measurements---
I am measuring with a high-end mw counter able to count up to 26-GHz 
and has an internal TCXO reference or can take an external 10-MHz 
reference.  I also have a LPRO Rubidium source which is rated +/- 5 
E-11 stability.  I find measurements using either the counter 
internal TCXO or the Rb source are identical when measuring under 
50-MHz signals (speaks well for that TCXO).  I have to wait at least 
30-minutes for complete warm-up stabilizing of the Rb source so 
usually for normal frequency checks I just run the counter with internal TCXO.


MY station 10-MHz standard is a Russian surplus MV62 Morion OCXO spec 
+/-5 E-12 (note it is more stable than my Rb).  But the OCXO must be 
calibrated as it is voltage tuned.  I use the counter/Rb for 
that.  Long-term (measured in months) stability of my OCXO is only 
+/-5 E-5 so I figure that I have to check the OCXO against the Rb 
about twice/year (never been more than 1-Hz off in 3-years running).


The counter can only count to 1-Hz so measuring less than a Hz is not 
possible.  There are sw to make such but I have not gone there (yet).


I build transverters up to 10-GHz which use PLL LO's which actually 
lock to the 10-MHz reference.  I have noted that I can adjust my OCXO 
when measuring 10,224.000,000 MHz to bring it closer to 10-MHz 
because any sub-Hz error is multiplied in the mw LO multiplier 
chain.  Something I cannot do if directly measuring the 10-MHz 
reference.  Of course this is "nit picking" for setting the OCXO for 
use on HF/6m with the K3EXREF.


One caveat in using a Rubidium full time as reference.  They have a 
finite life-span and more expensive (and probably harder to find once 
one fails).  So I only run my Rb for high accuracy checks and "lock" 
for daily use to my $45 or $25 OCXO.  My OCXO runs 24/7 from a 17AH 
battery which is float-charged from a good 12v PS.


73, Ed - KL7UW

Date: Fri, 11 Mar 2016 13:25:54 -0500
From: "Joe Subich, W4TV" 
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] 10 MHz external reference - GPSDO
Message-ID: <56e30db2.6080...@subich.com>
Content-Type: text/plain; charset=utf-8; format=flowed


 > 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



73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] OT noise on 17m

[n9tf]

Here's noise from my neighbors new washing machine (Samsung).  
http://www.slickpic.com/users/GeneGabry/albums/N9TFHamStationPhotos/?wallpaper#11792105
 
Repeats about every 17Khz. From about 20Mhz-22.5Mhz. Most of all the RF 
pollution in my neighborhood generates garbage on 15m. Have not seen any yet of 
17m. At least the washing machine garbage only lasts for about 60 minutes two 
to three times a week (when I'm in the shack on 15m). 
  
Just wait until buck/boost DC-DC converters and switchers are deployed more 
prolific at 1Mhz and higher. Company I work for makes the line choke and power 
inductors used in those switchers. They are worse noise generators than the 
lower frequency switchers 50khz-500khz. It's only going to get worse :( 
  
Gene, N9TF  

From: "HankP"  
To: "Robert G Strickland"  
Cc: "Elecraft"  
Sent: Friday, March 11, 2016 12:46:56 PM 
Subject: Re: [Elecraft] OT noise on 17m 

The stuff I have run into that is in the 16 to 18 khz range includes furnace 
/air conditioner  motor controls and  washing machines. 

Of course those are intermittent which is also a clue- although 
there are some furnace/A/C blowers that stay on at low speed all 
the time for circulation.   

If you have a P3 - decrease the span  and most of the newer stuff 
at certain parts of the cycle will actually be several spikes in 
each group of noise. 

Hank K7HP 



   


- Original Message - 
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 
-- 
Robert G Strickland, PhD ABPH - KE2WY 
rc...@verizon.net.usa 
Syracuse, New York, USA 
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Re: [Elecraft] Win4K3

[Barry LaZar]

Gary,
If you are using a KX3 rather than a K3 or K3S, you need only the 
sound card.  The KX3 gives you baseband I data on a connector on the 
left side of the radio.


73,
Barry
K3NDM

-- Original Message --
From: "Gary Gregory" 
To: "Elecraft List" 
Sent: 3/11/2016 3:25:20 PM
Subject: [Elecraft] Win4K3

Just tried Tom's latest software. HA, I didn't read the documentation 
fully

obviously and discovered I could not use the panadapter display without
having LP Pan or a Softrock or a P3.
I have a sound card and incorrectly assumed I was good t go, dear oh 
dear,

must be getting older by the day at a faster rate than I expected :-(
The K-Line minus the P3 is installed in the motorhome and just no more 
room

available for more hardware.
Disappointed but hey, life is full of minor setbacks.
Looks like a great program but sadly not what I can justify buying for 
now.
Thanks Tom for what looks like a terrific interface, back to DX Labs 
suite

for now.

73
Gary

--



*Gary - VK1ZZ, K3NHLSkype: Gary.VK1ZZhttp://www.qsl.net/vk1zz
Motorhome Portable*
*Miss Behavin'*


*Elecraft K3KPA500FT  #18KAT500FT  #007*
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[Elecraft] Win4K3

[Gary Gregory]

Just tried Tom's latest software. HA, I didn't read the documentation fully
obviously and discovered I could not use the panadapter display without
having LP Pan or a Softrock or a P3.
I have a sound card and incorrectly assumed I was good t go, dear oh dear,
must be getting older by the day at a faster rate than I expected :-(
The K-Line minus the P3 is installed in the motorhome and just no more room
available for more hardware.
Disappointed but hey, life is full of minor setbacks.
Looks like a great program but sadly not what I can justify buying for now.
Thanks Tom for what looks like a terrific interface, back to DX Labs suite
for now.

73
Gary

-- 



*Gary - VK1ZZ, K3NHLSkype: Gary.VK1ZZhttp://www.qsl.net/vk1zz
Motorhome Portable*
*Miss Behavin'*


*Elecraft K3KPA500FT  #18KAT500FT  #007*
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[Elecraft] New release of Win4K3Suite: The ultimate control for your K3, K3S and KX3

[Tom]

Hello,
The latest release of Win4K3Suite is now available.  In this release are new 
graphical S-Meters for the K3, K3S and KX3. In addition, this release now 
offers cross hairs for the spectrum scope.
Win4K3Suite is a comprehensive control program for the Elecraft 3 series 
products and supports all equipment such as the KPA500, KAT500, P3,  and 
KXPA100 as well as  LPPAN.
Win4K3Suite has a built in serial port router that works with ALL third party 
products both software and hardware.  As long as they work with the Elecraft 
radios, they will work with Win4K3Suite.  There is no need for LPBridge.  This 
solution is 100% stable and robust and can handle any contest you through at it.
Win4K3Suite also works with RemoteRig and allows streaming of LPPAN video from 
the remote site: (Please see https://www.youtube.com/watch?v=8—Vk2WWLok 
courtesy of Mats SM0FPR) 

Read the latest reviews 
here:http://www.amateurradio.com/win4k3suite-added-to-shack/

You can see some videos of Win4K3Suite in action here: 
https://www.youtube.com/results?search_query=Win4K3Suite

There is a 30 day trial available at va2fsq.com
73 Tom

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Re: [Elecraft] 10 MHz external reference - GPSDO

[Don Wilhelm]

Note that 2 Hz refers only to the reference oscillator which is close to 
49,380 kHz.  That is about .04 ppm, or about 10 times greater than the 
specification for the high stability (optional) TCXO.


The frequency accuracy at HF will also be .04 ppm - at 10 MHz that is 
0.4 Hz, at 20 MHzit is 0.8 Hz and so on.


73,
Don W3FPR


On 3/11/2016 11:03 AM, David Anderson wrote:

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.



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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  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 
>>> 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  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  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

[John Severyn]

Thank you David.  That article is very good and answered a lot of 
questions for me.

73
John AF6QO

On 3/11/2016 8:03 AM, David Anderson wrote:

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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Re: [Elecraft] OT noise on 17m

[KENT TRIMBLE]

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] OT noise on 17m

[HankP]

The stuff I have run into that is in the 16 to 18 khz range includes 
furnace /air conditioner  motor controls and  washing machines.

Of course those are intermittent which is also a clue- although 
there are some furnace/A/C blowers that stay on at low speed all
the time for circulation.  

If you have a P3 - decrease the span  and most of the newer stuff
at certain parts of the cycle will actually be several spikes in
each group of noise. 

Hank K7HP 



  


- Original Message -
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
-- 
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] K3 Feature Request

[j...@kk9a.com]

I am curious what you are you using the memories for? I really never
noticed any delay but during 300/hour rates I think it is way easier to
just to speak.

John KK9A



charlie carroll k1xx at k1xx.com
Fri Mar 11 13:12:02 EST 2016

I use the internal K3 message memories when operating as DX in an ssb
contest.
One of the biggest problem I face is the delay both in initiating the
message (from an external application) and the delay between the end of
the message and back in the receive mode.  From experiments, both of these
delays seem due to the time between the button presses on the K3's front
panel.  Granted, there may be some time between pushing the appropriate F
key in the application (Wintest).  But, this only addresses possibly the
initiation delay.

Could some method/application be added to upload an externally generated
audio file, which uses some standard format, into an arbitrarily assigned
message?  Or, at the very least, provide a means to change the K3 between
receive & transmit without suffering the delays due to button presses?

For the curious, when running at rates of 300+ QSOs per hour, the delays
turn out to be significant.

73 charlie, k1xx/vp2mmf


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Re: [Elecraft] 10 MHz external reference - GPSDO

[Joe Subich, W4TV]

> 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 
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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[Elecraft] K3 Feature Request

[charlie carroll]

I use the internal K3 message memories when operating as DX in an ssb contest.  
One of the biggest problem I face is the delay both in initiating the message 
(from an external application) and the delay between the end of the message and 
back in the receive mode.  From experiments, both of these delays seem due to 
the time between the button presses on the K3's front panel.  Granted, there 
may be some time between pushing the appropriate F key in the application 
(Wintest).  But, this only addresses possibly the initiation delay.

Could some method/application be added to upload an externally generated audio 
file, which uses some standard format, into an arbitrarily assigned message?  
Or, at the very least, provide a means to change the K3 between receive & 
transmit without suffering the delays due to button presses?

For the curious, when running at rates of 300+ QSOs per hour, the delays turn 
out to be significant.

73 charlie, k1xx/vp2mmf

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Re: [Elecraft] [K3/0] Remoterig sidetone way too loud

[Mitch Wolfson , DJØQN / K7DX]

Fred,

Go into the RRC's web menus and click on "keyer settings", then go to 
"side tone" and adjust the db down to an acceptable level.


73,
Mitch

Mitch Wolfson DJØQN / K7DX
10285 Boca Cir, Naples, FL 34109
Skype: mitchwo
USA: Home:+1-239-221-9600 - Mobile:+1-424-288-9171
Germany: Home:+49 89 32152700 - Mobile:+49 172 8374436

On 11.03.2016 11:27, Cady, Fred wrote:

In preparation for a trip I have the Remoterig boxes and a K3/0 Mini and K3 
working fine.  Problem is the sidetone is way too loud.  The K3's monitor level 
is 0 and the sidetone configuration in the control Remoterig is also 0 dB.  
Anybody have any ideas?

Cheers,

73,

Fred KE7X

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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  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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Re: [Elecraft] 10 MHz external reference - GPSDO

[Petr, OK1RP/M0SIS]

Hi,

in case of such amount of bucks is planned to be spent for "ready to go"
unit then Leo Bodnar is the very good choice but I preffer this "Low Jitter
/ Low Phase Noise" model:

http://www.force12inc.com/products/gps-locked-precision-frequency-reference-low-jitter-gps-clock-450-hz-to-800-mhz-output-custom-low-phase-noise-xtal-version.html

I know that it will not be utilized fully in case of just locking the K3 but
it can be used in much more application in ham shack like MW etc.

73 - Petr, OK1RP



-
http://ok1rp.blogspot.com
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Re: [Elecraft] [K3/0] Remoterig sidetone way too loud

[Robert Bajuk]

Hi Fred,

Change your RRC Control setting under Keyer settings
Side tone -db [50-0]:
Set it to more reasonable value, 0 is the loudest, value is in "- db" :-)

Set it to 45 or 50 and you must see the difference

Hope it helps

73 Robert, S57AW



On Fri, Mar 11, 2016 at 5:27 PM, Cady, Fred  wrote:

> In preparation for a trip I have the Remoterig boxes and a K3/0 Mini and
> K3 working fine.  Problem is the sidetone is way too loud.  The K3's
> monitor level is 0 and the sidetone configuration in the control Remoterig
> is also 0 dB.  Anybody have any ideas?
>
> Cheers,
>
> 73,
>
> Fred KE7X
>
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Re: [Elecraft] 10 MHz external reference - GPSDO

[Richard W. Solomon]

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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Re: [Elecraft] OT noise on 17m

[Jim Brown]

Yet another example of a switch-mode power supply.  Here's a preliminary 
version of k9yc.com/KillingReceiveNoise.pdf  that might help.


73, Jim K9YC


On Fri,3/11/2016 6:41 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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[Elecraft] [K3/0] Remoterig sidetone way too loud

[Cady, Fred]

In preparation for a trip I have the Remoterig boxes and a K3/0 Mini and K3 
working fine.  Problem is the sidetone is way too loud.  The K3's monitor level 
is 0 and the sidetone configuration in the control Remoterig is also 0 dB.  
Anybody have any ideas?

Cheers,

73,

Fred KE7X

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Re: [Elecraft] OT noise on 17m

[David Anderson]

Bob,

Most probably a switched mode power supply somewhere locally, almost everything 
we see repeated at regular frequency intervals like that are harmonics of SMPS. 
Often up to VHF unfortunately :-(

Have you tried switching off the house breaker and listening on batteries to be 
sure it isn't self inflicted?

It could be anything from a mobile phone charger to a grow light ballast. 

73 from David GM4JJJ

> On 11 Mar 2016, at 14:41, 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
> -- 
> Robert G Strickland, PhD ABPH - KE2WY
> rc...@verizon.net.usa
> Syracuse, New York, USA
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Re: [Elecraft] OT noise on 17m

[ab2tc]

Hi,

None of it here in Camillus (a suburb west of Syracuse).

AB2TC - Knut



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Re: [Elecraft] 10 MHz external reference - GPSDO

[David Anderson]

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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Re: [Elecraft] 10 MHz external reference - GPSDO

[David Anderson]

Hi Gary,

Because the K3 only -frequency- locks the frequency to within about 2Hz you 
won't notice any difference between them. Similarly because the K3 TCXO isn't 
-phase- locked to the external reference any phase noise on the reference won't 
affect low phase noise of the synthesiser in the K3.

So buying a kilobuck reference isn't going to gain you anything at all. 

The BG7TBL or the Leo Bodnar unit would be my choice. (I have both here and a 
Z3801A) . The Leo Bodnar being a nice low power consumption unit, and a lot 
more versatile than just a 10 MHz GPSDO. It has many other uses around the 
shack, covering up to 800 MHz.


73 from David GM4JJJ

> On 11 Mar 2016, at 12:53, Gary Smith  wrote:
> 
> I appreciate the replies to my question about sourcing a 10 MHz 
> external reference for my K3s. I didn't realize I needed more than 
> the K3EXREF to gain this accuracy and thanks to these replies, I now 
> better understand what will and what will not work. While I would 
> prefer to be able to buy a satisfactory GPSDO or kit from Elecraft, 
> it isn't an option at this time and not knowing if one is on the 
> Horizon, I must look elsewhere to find one. 
> 
> What makes it a more difficult choice is understanding what values 
> are sufficient and what is excess; some of these devices are in the 4 
> figures and some used are less than $40. I was about to buy a $40 
> used TCVCXO but learned they need to be recalibrated to maintain 
> their precision and I having no equipment to do this, one of the more 
> expensive options apparently is a better solution.
> 
> Apparently the low cost GPSDO are an affordable way to go for long 
> term accuracy but which one to get? Some apparently have jitter from 
> poorly isolated interference due to the proximity of their 1pps 
> Square wave functions but is that jitter something to affect their 
> function as a frequency standard for the K3/K3s, I have no idea. Is 
> there an advantage in accuracy by using the GPSDO linked below over 
> the BG7TBL versions from China? $226 & needing antenna and power 
> supply for low jitter vs $150 for everything but with higher jitter? 
> Is a square wave output as useful as a sine wave, both are available 
> in the BG7TBL versions. For an external reference function with the 
> radio, what is excess? I have no idea.
> 
> Apparently the components in the BG7TBL versions change due to their 
> supply of surplus components; the versions are the manufacturing 
> date, and not all work identically because of this. But does it 
> matter, is the least desirable GPSDO still adequate to do this job 
> properly? Engineering is not my field and there's a lot to sift 
> through in reading peoples discussions and opinions when most of the 
> comments are not directed to effectiveness with the K3/K3s.
> 
> There are other options available but apparently the prices have gone 
> up recently and some once viable options are now not available or 
> highly priced, even when used. If Elecraft is not going to make an 
> option available for purchase, what would probably be helpful would 
> be a listing here or on someone's page, of what kind of affordable 
> units are ideal for the 10 MHz reference source and what is 
> un-necessary overkill.
> 
> Thanks again for the replies, its always fun to learn new things.
> 
> 73,
> 
> Gary
> KA1J
> 
> 
>> Take a look at this GPSDO 
>> .
>>  
>> Needs 13-15 VDC and a powered GPS antenna, but it is plug and playon any 
>> frequency from 450 KHz to 800 MHz, with software-adjustable output level.
>> 
>> 73, Pete N4ZR
>> Download the new N1MM Logger+ at
>> . Check
>> out the Reverse Beacon Network at
>> , now
>> spotting RTTY activity worldwide.
>> For spots, please use your favorite
>> "retail" DX cluster.
>> 
>>> On 3/9/2016 12:37 PM, Gary Smith wrote:
>>> I ordered the K3EXREF and thought it was the oscillator itself which
>>> would provide the external signal source to the K3s. I thought this
>>> was all I was going to need but I see now that is not the case.
>>> Looking on the Elecraft order page, they don't sell a reference
>>> source.
>>> 
>>> What external 10-MHz reference signal source might I find get that is
>>> not terribly expensive that will do the proper job and allow me to
>>> get this working?
>>> 
>>> Thanks & 73,
>>> 
>>> Gary
>>> KA1J
> 
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Home: 

[Elecraft] OT noise on 17m

[Robert G Strickland]

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
--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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[Elecraft] K3 For Sale Mint

[Ron Durie]

Elecraft K3/100 #7504, which includes all factory upgrades.  
This is a good basic K3 that won't take much to Option up.

K3SYN3AUPG newest Synthesizer option installed.  This significantly improves
receiver performance.  

KXV3A Receive ANT IF out and XVRTR Interface board.  
KIO3 I/O board option.  

Standard KTCXO3 Reference Oscillator, 0.5PPM. 
KBPF3 General Coverage Receive option.  

Standard 5 pole 2.7 kHz crystal filter.
KAT3 Internal automatic antenna tuner option.  

In "Like New" condition.  No scratches or blemishes.  Even all the front
panel knobs are new.  One owner nonsmoker.  It is 18 months old. 

This is the 4th K3 I have built.  When I build, these I treat every
connector pin with Caig De-Oxit Pro gold solution, to prevent pin Oxidation;
intermittent connections; easy connector insertion; and very low contact
resistance.  

Includes PowerPole Power cable; Allen wrenches; PA Jumper; and all manuals. 

Contact me off line at:  WB4OOA at gmail.com 
$2795 Shipped CONUS.  Pictures available upon request. 

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[Elecraft] For Sale: K3/100 w/opttions

[cx7tt]

Selling my Elecraft K3/100 radio. Original owner, radio has always been
operated in non-smoking environment, never portable or mobile.

Fully functional, clean, great shape; recently received K3s and this K3
is no longer in use.

Serial number is #250 and radio has all updates and mods done by
Elecraft techs (records avail upon request).  Recently tuned and aligned
by Elecraft in Jan 2016.

Options installed:
KAT3 Internal tuner
KPA3 100w internal PA
KXV3A RX ant, I/O, transverter, IF output
2.7kHz 5 pole filter
500Hz 5 pole cw filter

$1995 via Paypal or personal check; shipped CONUS with insurance to PP
registered address or verified QRZ.com address.

Radio will be shipped from W3FPR QTH in N.C.

Contact me via email or 305-767-1927
73, Tom K6CT/HP1
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Re: [Elecraft] 10 MHz external reference - GPSDO

[Gary Smith]

I appreciate the replies to my question about sourcing a 10 MHz 
external reference for my K3s. I didn't realize I needed more than 
the K3EXREF to gain this accuracy and thanks to these replies, I now 
better understand what will and what will not work. While I would 
prefer to be able to buy a satisfactory GPSDO or kit from Elecraft, 
it isn't an option at this time and not knowing if one is on the 
Horizon, I must look elsewhere to find one. 

What makes it a more difficult choice is understanding what values 
are sufficient and what is excess; some of these devices are in the 4 
figures and some used are less than $40. I was about to buy a $40 
used TCVCXO but learned they need to be recalibrated to maintain 
their precision and I having no equipment to do this, one of the more 
expensive options apparently is a better solution.

Apparently the low cost GPSDO are an affordable way to go for long 
term accuracy but which one to get? Some apparently have jitter from 
poorly isolated interference due to the proximity of their 1pps 
Square wave functions but is that jitter something to affect their 
function as a frequency standard for the K3/K3s, I have no idea. Is 
there an advantage in accuracy by using the GPSDO linked below over 
the BG7TBL versions from China? $226 & needing antenna and power 
supply for low jitter vs $150 for everything but with higher jitter? 
Is a square wave output as useful as a sine wave, both are available 
in the BG7TBL versions. For an external reference function with the 
radio, what is excess? I have no idea.

Apparently the components in the BG7TBL versions change due to their 
supply of surplus components; the versions are the manufacturing 
date, and not all work identically because of this. But does it 
matter, is the least desirable GPSDO still adequate to do this job 
properly? Engineering is not my field and there's a lot to sift 
through in reading peoples discussions and opinions when most of the 
comments are not directed to effectiveness with the K3/K3s.

There are other options available but apparently the prices have gone 
up recently and some once viable options are now not available or 
highly priced, even when used. If Elecraft is not going to make an 
option available for purchase, what would probably be helpful would 
be a listing here or on someone's page, of what kind of affordable 
units are ideal for the 10 MHz reference source and what is 
un-necessary overkill.

Thanks again for the replies, its always fun to learn new things.

73,

Gary
KA1J


> Take a look at this GPSDO 
> .
>  
> Needs 13-15 VDC and a powered GPS antenna, but it is plug and playon any 
> frequency from 450 KHz to 800 MHz, with software-adjustable output level.
> 
> 73, Pete N4ZR
> Download the new N1MM Logger+ at
> . Check
> out the Reverse Beacon Network at
> , now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
> 
> On 3/9/2016 12:37 PM, Gary Smith wrote:
> > I ordered the K3EXREF and thought it was the oscillator itself which
> > would provide the external signal source to the K3s. I thought this
> > was all I was going to need but I see now that is not the case.
> > Looking on the Elecraft order page, they don't sell a reference
> > source.
> >
> > What external 10-MHz reference signal source might I find get that is
> > not terribly expensive that will do the proper job and allow me to
> > get this working?
> >
> > Thanks & 73,
> >
> > Gary
> > KA1J

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