Re: [Elecraft] Analysis of a CW Communication

[Arie Kleingeld PA3A]

I still miss that 500 kHz chatter

73,
Arie PA3A
Sparks on several ships using the good old ARRL deluxe keyer



Non-revenue chatter on the marine CW frequencies in the 50's ran 
anywhere from 10 to 35-40 WPM.  The Company urged revenue traffic in 
the 18-20 WPM range.  They'd found that speed range maximized traffic 
throughput over time.  Of course, revenue traffic was almost always 
longer than "5NN TU". [:-)


73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn



Try sitting down for eight (8) hours on MF (500KHz) during the summer 
months

as I have done frequently while @ WPA/Port Arthur TX working for RC

73

Tom/K1TL...





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Re: [Elecraft] K3s Notch Filter

[Arie Kleingeld PA3A]

Is there any way to make the manual notch filter really narrow to keep morons 
running legal limit on FT8 from wiping out my waterfall and making my ears 
bleed?



Well, the K3's nothfilter may not be the best for FT8. Besides that, 
when the notch is engaged, the AGC is still responding to that strong 
signal. That's in the design...


73.
Arie PA3A


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Re: [Elecraft] K4

[Arie Kleingeld PA3A]

K3 (with the S-mods) and K3S are still strong going and competitive 
superhets if you have all the necessary filters and use the items in the 
menu  (like AGC-settings etc). It's fast, no delays, easy to use, the 
panadapterdisplay is already on my computerscreen (don't need a P3 for 
that) and integrated with mouse control etc. People who use my K3 during 
a contest are still impressed how smooth the K3 operates in every mode, 
and how good a receiver it has.
Only thing I would like myself is an different noise reduction 
algorithm. To get there, you probably need new 'infrastucture' like 
direct digital conversion and full SDR. That's a dicision for the makers.


But please for the K3 (this is for Wayne), could you find the time to 
compensate the S-meter for pre-amp2?


73 all,

Arie PA3A
(S-modded K3 #1255)


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Re: [Elecraft] ERR KEY Message

[Arie Kleingeld PA3A]

Hi Bob,

I've been playing with the RSP1A at the IF of my K3 and HDSDR and SDR 
Uno as panadapter software. I also had Omnirig running for this. Never 
bumped into the kind of problem you describe. I can reproduce your 
problem though, by setting up omnirig with wrong RTS/DTR setting. One 
thing to observe is that you connect OmniRig to the K3 with RTS and DTR 
low. This will probably cure your problem.


HDSDR / SDR Uno and the RSP1A  not really gave me the results I want. My 
best and cheap panadapter is still the IF-Softrock plus my pc-onboard 
soundcard. Software: NAP3 and LP-BRIDGE. Wonderful pieces of software 
(THANK YOU GUYS). They do the trick for a beautiful panadapter (in 
collapsed mode) and flawless integration with the K3 and other software. 
The noise floor might not be as low as in the P3 of LP-pan, but it works 
for me as a panadapter.


73

Arie PA3A

Op 17-4-2019 om 03:57 schreef Bob Conder via Elecraft:

Been trying to configure SDR Uno with RSP2 as a spectrum scope. (Using IF output to RSP) 
But not much luck.Right now, when I turn on SDR Uno, with the K3 already in CW mode, the 
SDR keys the rig for a moment, then stops.The "ERR KEY" message shows up on the 
screen.Can't get the message to clear, and can't send CW, so have to pwr down the rig, to 
get the error message to clearand to be able to operate the K3 agn.Anyone else with SDR 
Uno/RSP2 have this problem?Any suggestions appreciated.TIA,Bob K4RLC

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[Elecraft] K3 no TX, no RX, and solved

[Arie Kleingeld PA3A]

Just for sharing.

Case:
K3 #1255 (loaded)
Has all mods during the years and upgrades to K3(s) except for USB port

Problem: no TX and no RX (not on main, not on sub)

Analysis:
1. Connecting a panadapter on the IF out: IF signal of main RX is there 
and and signals are where they should be, so VCO of main RX (as first 
oscillator) is working all right
2. The two pre-amps, attenuator, and antenna switches working fine 
(checked on panadapter)

3. RF gain to minimum moves S-meter to max on Main- and Sub-RX (normal)
4. All RX DSP functions seem to work on the little noise that is audible
5. Audio spectrum analyser connected at audio output shows that IF 
filters do not influence the audio bandwidth, only the DSP does. 
(fiddled with the filtersettings in the K3 utility)


Conclusion:
There's a hick-up between the 8.2MHz IF and the entrance to the DSP, 
seems like 2nd IF of 15kHz is down. No mixing signal form 8.2MHz to 
15kHz? That one sits on the KREF3, where all those TMP-cables come together.



Checking the reflector...
Found this line: 'TMP-cables are a class by itself' , and indeed it is 
so.  :-)


Repair: Refitting all TMP-cables

Result: K3 is playing as normal again and PA3A is a happy man.
(By the way, this is not the first time in the life of #1255 that its 
TMP-cables needed a little push.)



Cheers and 73 to all,

Arie Kleingeld PA3A

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Re: [Elecraft] Power source for KAT500

[Arie Kleingeld PA3A]

Sid,

Using the normal 13.8V powersupply for that, which is also used for my K3.
The 12V connection on the backside of the K3 I use for a panadapter.


73

Arie PA3A


Op 24-8-2017 om 5:44 schreef Sid Frissell:

Just got my new KAT/KPA500 on the August Special.  I have both units all wired, 
tested and ready to go except for the 12 to 15 VDC power connection for the 
KAT500.  What are you experienced KAT/KPA owners using for this power source?  
What amperage is required?  Advice would be appreciated, please.

Sid. NZ7M

Sent From Sid Frissell's iPad
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Re: [Elecraft] Amplifier thoughts

[Arie Kleingeld PA3A]

Who needs three boxes if it has a switching power supply and the amp 
itself has >90% efficiency?

That would be a nice amp in the best Elecraft 'portable' tradition.

This is the only 1.5kW linear I would consider buying as a replacement 
for my good old Commander.


73,
Arie PA3A

Op 29-3-2017 om 18:17 schreef Phil Hystad:

snip>

If this new 1.5 KW linear (if that is the power) becomes a reality, having it 
come in three
separate boxes may make some sense.  Alternatively, like the Icom PW1, have a
control head that sits on the shack desktop and the main unit containing 
everything
else would be on the floor in a dark corner where it belongs (and, where I had 
my
PW1).

< snip




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Re: [Elecraft] Linear thoughts

[Arie Kleingeld PA3A]

Besides the usual things nearly every other hi-end linear has:
- tuner built-in as an option
- really light weight
- at least 90% efficiency
- one, max 2 antenna ports

(these fit into the portable rig philosophy of Elecraft)

73
Arie PA3A
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Re: [Elecraft] K3 Receiver mush

[Arie Kleingeld PA3A]

Thanks Ian for bringing all the info back to the list.

My settings: slope 9, thr 12, decay soft, pls nor, hld 0.20 , agc-s 20 
to 30 (depends...)


73,

Arie PA3A


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Re: [Elecraft] Changing CW pitch?

[Arie Kleingeld PA3A]

Ed, That kind of pain was part of the K2 fun for me (LOL)

73
Arie PA3A


Op 6-12-2016 om 10:31 schreef Eddy Avila:

 Thanks everyone for your sage advice.changing CW pitch sounds like a 
pain to me!!



ed ~ k6sdw




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Re: [Elecraft] KPA500 power output starts out low, then goes up

[Arie Kleingeld PA3A]

I had the KPA500 PIN diode problem in 2015, and it started on one band 
only. And it did not happen all the time. After a while it became worse 
and more bands were affected.
So based on my experience with my KPA500 #1497, I suggested the PIN 
diode problem as a possiblity.


I wonder what the serial number is of the KPA500 we are talking about, 
and whether it is produced before or after a change in the design(?). 
Anyway, when I presented this problem (how it presented itself on my 
KPA500) in the group and to elecraft support, I never got the right answer.
After basic faultfinding I found that the PIN diode circuit was causing 
the strange behaviour of the linear and then... presto... there was a 
elecraft-mod that I never heard of before.
It contained a few new switching components and some capactiors for one 
of the LP-filters.


After putting those in, problem was solved. My K3 line and me lived 
happy ever after :-).


73

Arie PA3A



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Re: [Elecraft] KPA500 power output starts out low, then goes up

[Arie Kleingeld PA3A]

This might be a problem with the pin diode T/R switching in the KPA500.


73,

Arie




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Re: [Elecraft] K3-TX "stutters" on power up

[Arie Kleingeld PA3A]

Fred,

The cause might be the initialisation of the com port connected to the 
K3 (PTT and KEY on pins of RTS and DTR, = pins 4 and 7).


73
Arie PA3A

Op 31-10-2016 om 5:15 schreef Fred Jensen:
This may not be new, I often pay no attention to the radio if I power 
it up, but recently I've noticed that it's going into TX multiple 
times as the start-up display scrolls by on VFO B.  I don't think it's 
making any RF.


FWIW:  I do operate W7RN remote using RemoteRig which immediately puts 
the K3 into TERM mode.  This problem I've noticed happens when I'm 
operating from home, 100W, almost always on CW.


I don't see any harm to it, it's just new, and I'm wondering.  FW is 
5.38  Any info appreciated.


73,

Fred K6DGW
- Sparks NV DM09dn

- Northern California Contest Club
- CU in the Cal QSO Party 7-8 Oct 2017
- www.cqp.org
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Re: [Elecraft] Information Needed

[Arie Kleingeld PA3A]

Louis,

In my shack I have the KPA-KAT500 combo stacked permanently: KPA500 on 
top of the KAT500. It's like since I have them (2013).
During portable use (fieldday etc) the K3 is on top of that. Compact and 
easy.


See this short youtube video of the PI4D fieldday how that looks: 
https://www.youtube.com/watch?v=nAI9HKwEMxU


73
Arie PA3A

Op 28-10-2016 om 4:24 schreef louis a. ives:

I will be constructing a rack for my, K-3, KPA-500, KAT-500, P-3.  My concern 
is how much air space is needed for the equipment.  I need to rack the 
equipment to increase space on my bench. The KPA-500 will be on bottom, mainly 
because of the weight.




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Re: [Elecraft] K3 Freq jumpnig when cold (50F or so)

[Arie Kleingeld PA3A]

Bill,

Maybe it's a hardware problem:
The connector from frontpanel to main rf board for example?

When the temp is low, maybe there are some bad contacts. Take off the 
front panel and  clean all pins of the connections. Do this thouroughly, 
polish all four sides of each connector-pin.


73
Arie PA3A
K3 #1255

Op 21-10-2016 om 1:50 schreef Bill Coleman:

Thanks Don.I put on 5.54 The K3 is behaving differently   No
more jumping down 1MHz.

What it is doing now:  there's still a relay clicking once in a while as I
tune VFO A - this is within any given ham band.
Now, while tuning VFO A, VFO B will jump frequency.

Example:
VFO A = 3.853, press A>B, tune A up frequency less than a kHz, B jumps, now
A = 3.853 B = 3.994

Somewhat similar but stranger behavior on 40M
VFO A = 7.274, press A>B, tune A up freq, B jumps a LOT, now A=7.275 B =
8.600

In the time it has taken to test and scribble the results, the rig has
warmed up from 50F to 66F and it works fine  No freq jumps, no relay
clatter.

OK, I went back to Firmware  5.52 & chilled the rig (53F).   The jumping
1MHz down is back.   Hmmm...  Next step?  I'm thing the FP flash memory has
a problem with low temps.

THX,  Bill  N2BC

-Original Message-
From: Don Wilhelm [mailto:donw...@embarqmail.com]
Sent: Thursday, October 20, 2016 10:51 AM
To: Bill Coleman; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Freq jumpnig when cold (50F or so)

Bill,

Try loading beta firmware 5.54 to that K3 and see if that behavior
continues.
That firmware improves the flash memory interface.
I can't say for sure if it will fix that K3, but is worth a try.

73,
Don W3FPR

On 10/20/2016 10:16 AM, Bill Coleman wrote:

Have our club's K3/100, serial # 67xx.   When it is cold (FP=11C  52F ),
increasing the frequency using  VFO A or VFO B causes a 1MHz jump DOWN
in frequency.  When reducing frequency the failure is much less
frequent and it will also jump down 1 MHz.  At times while tuning up
in freq there are some relay clicks - usually 2 -  but no frequency jumps.


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Re: [Elecraft] Microphone

[Arie Kleingeld PA3A]

Bill,

You could try a nice looking, computer headset with electret mic. You'll 
be amazed by the results. The K3 works well with just about any mic. 
Well done Elecraft.


I never bought any handmic. But I own several headsets, a $4,50 plastic 
one (has a good mic), a Yamaha CM500 ($45, many K3 owners have that one, 
good mic) and a david clark aviation headset (several hundreds of 
dollars, good mic).


The difference is in the ears of the headsets, all mics perform well, 
thanks to the EQ/gain/proc-setting possibilities in the K3. I take the 
plastic headset with me when camping, the CM500 in my quiet shack and 
the david clark when I'm working in a multi-operator contest with lots 
op people walking and talking.


As far as mic-audio is concerned: how much hi-fi can you put through a 
2.5kHz bandwidth SSB signal? Will the expensive Heil PR-10 make a real 
difference? For peace of mind: buy the Heil. 'My mic is is Heil PR-10' 
sounds quite different from "my mic is a cheap electret computermic'.


:-)

73

Arie PA3A



Op 13-10-2016 om 20:37 schreef Bill DeVore:

I just completed assembly of my K3S, KAT500, KPA500 and P3. I didn't order a 
microphone from Elecraft. I am considering a Heil PR-10 but will welcome any 
suggestions.

Bill - W3PNM


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[Elecraft] Crowdfunding a 1500 watt amp

[Arie Kleingeld PA3A]

I think that crowdfunding a KPA1500 would help to get Elecraft going 
again on a big amp.
Crowdfunding would also give a good indication on how many KPA1500's you 
could sell in the market as it is today.


73
Arie PA3A
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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[Arie Kleingeld PA3A]

NAP3 + Softrock IF + built-in stereo line in (96kHz samplerate) is best 
bang for the buck if you want to see the band, point & click and solid 
integration with K3 and other software.


The combo here is:
- software: N1MM logger + NAP3 + LP-bridge
- hardware: Softrock-IF, built-in soundcard on 5 year old laptop (can 
run at 192kHz) or back in the shack an 8 yr old vista-Dell with $50 
soundcard.


Use the point and click when scanning the band and looking for certain 
stations or QRM free frequencies.


73
Arie PA3A



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Re: [Elecraft] KXPA100 Keying Mod

[Arie Kleingeld PA3A]

Hi David,

Elecraft probably did not communicate it to you. I had a TR-switch 
problem in my KPA500. After a good search and some correspondence with 
Elecraft  I found the cause of the problem. And   Presto, there was 
standard mod for it and they did not tell me that beforehand.  I had to 
find the rootcause of the problem first. Learned a lot by the way haha.


(Anyway, the KPA500 does a splendid job.)


73

Arie PA3A


Op 9-6-2016 om 16:43 schreef David Robertson:

I either missed the memo or Elecraft didn't contact those of us about this
problem. Elecraft now has a mod kit that solved the keying problem. The kit
part number is KXPAMDKT2 and is free.


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[Elecraft] test

[Arie Kleingeld PA3A]

Sorry.

Arie PA3A

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Re: [Elecraft] K3 Diversity RX

[Arie Kleingeld PA3A]

Ben,



Full tracking (freq, mode, filter etc) is enabled with diversity on.

Frequency tracking alone and leave the rest open, that is in the menu: 
config: VFO LINK


I use them both under different circumstances, but that is not what you 
are asking.


73
Arie PA3A


Op 6-5-2016 om 15:50 schreef w...@windstream.net:

Retired now, so more time to "play radio."

Questions about Filter selection / Shift / Low-Hi Cut / Width control when K3 
is in diversity mode.

Does the KRX3 track these main RX settings when diversity is enabled?

Can this "tracking" be disabled if it is enabled by default?

Look in archives and googled for this answer, but no joy on finding answer!

73 de Ben W4SC



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Re: [Elecraft] Need Advice

[Arie Kleingeld PA3A]

Ed,

I did the Synth upgrade (= improvement) and the 2nd preamp for the 
higher bands (= a very necessary feature)


That's it for me.

73

Arie PA3A




Op 2-5-2016 om 20:49 schreef Ed via Elecraft:

I have had my K3 for a few years and have always kept it up to date.  It seems 
cheaper than taking a loss in selling it and springing for a K3S. I am about to 
send it in again for the new synth boards and DSP board swap, etc.

In the end, I will have 90% of a K3S. Is this the way to go?

Thanks,
Ed NI6S



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Re: [Elecraft] , K3 Gold Plated Plug Replacment

[Arie Kleingeld PA3A]

No more issues

K3 #1255

73
Arie PA3A


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Re: [Elecraft] New Elecraft Product: K-Pod Control Panel for K3S and K3 Transceivers

[Arie Kleingeld PA3A]

K-pod:

Interesting feature. Could be the first part to connect to the K4.

73
Arie PA3A

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Re: [Elecraft] Rerouting the KRX3 AUX Input from the Rear BNC to the KAT3

[Arie Kleingeld PA3A]

Sverre,

just curious, why would you like to route the 2nd RX through the KAT3? 
What is it that you trying to accomplish?


Arie PA3A

Op 1-4-2016 om 19:56 schreef Sverre Holm (LA3ZA):

When I built my K3 some years ago I routed the second receiver's AUX antenna
input to the rear panel BNC connector. But now I have changed my mind and
want to route it through the KAT3 instead, in order to try diversity
reception.

How complex is this to accomplish? I know I need to plug in another 30 cm
tmp cable to the KRX3 board than the one I am using now. But how many panels
do I need to remove from the K3? The top I'm sure I need to remove, but is
that enough?





-
Sverre, LA3ZA




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Re: [Elecraft] IC-7300 video - things to come

[Arie Kleingeld PA3A]

Wow, a touch screen. Wow? Come on, it's just an interface between man 
and machine.


Just some ( and I mean /some/) thoughts:

A touch screen can be a cheap set of programmable buttons.
Could be nice for a user and maybe  a cost reduction for the 
manufacturer. Nothing special and I'm not impressed at all. The 
touchscreen has several drawbacks as have been already stated. To add 
one: screen buttons can take up too much space on the screen if the 
screen is not big enough. My screen must display useful information 
(that is what screens are for), and must have a fair size.


A touch screen is nice if you want to manipulate things.
Manipulating things: zooming in and out, rotating, moving, etc. As long 
as it is easier with than with a mouse, the touch screen is super. 
(precise manipulation is easier with a mouse)


Ergonomically: high resolution (duh) and easy to access.
Screens in ham transceivers used to be vertical, like a computer screen, 
also vertical. The 'classical' touch screens are more or less 
horizontal, like tablets and smartphones. Some manufacturers have tried 
to make hamradio equipment with touch screens that are somewhere in 
between: IC-7100 panel, Acom-2000 panel, etc.
I think we have to learn from the windows-8 computers and ditto laptops 
how we tend to do things. In which cases do we touch the screen?


High resolution info on a high resolution screen
A good resolution screen is as good as the resolution of the info.

73
Arie PA3A




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Re: [Elecraft] Diversity Mode filter selection question

[Arie Kleingeld PA3A]

Hello Bill,

During normal operation there a no clicks when changing a filter.

My K3 is an older one, but ever since I have the NEW SYNTH's on board, 
there's a lot of clicking going on when I change the width of the 
filters in Diversity mode.


Nothing to worry about. I think the relays are on the new Synt-boards?  
Everything works. The diversisty is brilliant.


73
Arie PA3A



Op 24-2-2016 om 0:53 schreef Bill OMara via Elecraft:

I'm the proud owner of four K3 radios at my contest station and one of my
new K3 (89XX) is doing something different than the other three and I'm
trying to understand what it's doing.

  


In the diversity mode as I change the width control and reach the selection
points for different CW filters to be selected I hear what sounds like two
(one after the other) clicks of what I'm guessing is the two new filters
being selected as the width is either decreased of increased. This same dual
clicking sounds happen at each filter selection point.

  


What's weird is that the other three K3 radio don't do this.  Is it a
different configuration setting?  If so, what is the configuration setting?

  


This same radio doesn't make any clicking sound when changing the width
control, filters when it's NOT in diversity mode.




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Re: [Elecraft] KPA1500

[Arie Kleingeld PA3A]

I  that Elecraft needs a new very good product that will sell at 
least 10.000 pieces in the next 3 or 4 years.

If not a PA, what product would that be? That would be a logical strategy.

(My two cents worth or maybe even less.)

73
Arie PA3A

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Re: [Elecraft] CW-Skimmer Frequency Offset

[Arie Kleingeld PA3A]

Hajo,

Whatever you do, the skimmer screen shows on the screen what it is 
'listening to'. So set the offset in the settings of skimmer so that 
skimmer shows you what you hear in the KX3.
(I use the K3 with a real softrock and I can adjust the offset right on 
the spot.)


Arie PA3A

Op 16-2-2016 om 14:33 schreef Hajo Dezelski:

Oh I forgot:

I use the Softrock-IF as Radio (model).

​73 de

Hajo
​ DL1SDZ​


---
Cela est bien dit, mais il faut cultiver notre jardin.

On Tue, Feb 16, 2016 at 1:08 PM, Hajo Dezelski  wrote:


Hello,

using the Kx3 with CW skimmer and Aggregator 4.1 I got a message from RBN
" RBN calculated frequency offset has a maximum value of 1.6 kHz on 20
meters. Please calibrate your skimmer to reduce this offset to a value
between -0.1 and -0.1 KHz."
When I change the mode on the Kx3 from cw to usb the difference is reduced
to 1,0 khz.

Which mode should I use to be right on the frequency?

Or should I change within skimmer the Audio IF to -1600 Hz. and use CW. My
frequency offset in cw is 600 Hz.

​Thanks for your advice​

​73 de​

Hajo
​ DL1SDZ​


---
Cela est bien dit, mais il faut cultiver notre jardin.


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Re: [Elecraft] K3: roofing filter configuration settings

[Arie Kleingeld PA3A]

Hi Dick,

Just do it. If you need a certain bandwidth for a certain mode, use the 
narrowest roofer you have in there; just like in any other conventional 
transceiver.
So if you want 350Hz as bandwidth, use that 250 filter (which is 
actually 370). That's common sense.
Don't let the 250Hz tag on the filter fool you. They say they sell you 
250Hz, that's just not true. It should have stated 350Hz or so.


And in ham spirit: just try out different settings and decide what works 
best.


73
Arie PA3A

Op 10-2-2016 om 6:05 schreef Dick via Elecraft:

snip>
  
The factory default roofing filter "configuration bandwidth" setting  is to

set the 250hz filter at a setting of "250".  Therefore, the  250hz roofing
filter will engage at the same time as the 250hz DSP filter.
However, since the 250hz roofing filter has an actual BW6 of 370hz,  aren't
there times when it would be more beneficial to have  the "configuration
bandwidth" of the 250hz roofing filter set to 350 or  400?
I'm thinking this may be especially true when operating RTTY since the
average RTTY bandwidth is aprx. 370hz.  Perhaps there are times when  this
would be beneficial when operating other modes as well?
  
  
Dick- K9OM
  


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Re: [Elecraft] K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

[Arie Kleingeld PA3A]

No luck with the NB, trying SSB with the FM-roofer.
The NB already did a good job on the eletric fence 'ticks' using a 
normal filter.
As for the other noise from the neighbourhood: I have not yet been able 
to produce a good result using this method.


73,

Arie PA3A


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Re: [Elecraft] USB Soundcard

[Arie Kleingeld PA3A]

Tim,

About the line-in / mic in a simple laptop:

Before going through the process of buying a super usb external 
soundcard, check the windows configuration - sound of your laptop and 
look at recording devices.
You'll probably find the mic. Then check the properties of that 
connection. In the advanced settings you MAY find that the mic can be 
configured as stereo with 96k or 192k sampling.


My 2010 Samsung cheap N210 netbook can run stereo 96k and give a nice 
panafall with NAP3! It ties up the processor :-) but I can still log my 
QSO's at the same time.
My doughter's 6 year old medium priced Toshiba laptop does 192k, without 
any problem.


So don't let the word 'mic' or the little mic-picture on the side trick 
you. Check it first in the software settings.

My two cents worth.


73
Arie PA3A


Op 19-1-2016 om 4:20 schreef a45wg:

Please could anyone shed some light as to what type of USB Sound card I can use 
as my entire range of Laptops - are only fitted with Mic-In and not a Stereo 
Line-In.

I have managed to procure a stereo 2.5 to 3.5mm male-male audio lead.

I am hoping to be able to see the I/Q output from my recently built KX3 - using 
some software tools.

Looking forward to hearing what works/does not work well.

Many thanks

Tim, A45wg. Muscat
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Re: [Elecraft] K3 Fan Settings

[Arie Kleingeld PA3A]

Irwin,

The PA temp calibration is, as Don already stated, in the manual.

Just wondering, do your fans actually run?

The fans can be tested  in de menu: KPA3.
If set to 'PA nor' then the fans are temp controlled.
If you turn the main dial, PA Fn1 - Fn4  will come on the display, You 
should hear the fans running.



73
Arie PA3A

Op 3-1-2016 om 4:44 schreef Irwin Darack:

Thanks. I will reset the PA Temp to a lower setting. I am finding that once
the PA temp gets to 27C, it shuts the 100w amp off and I only get 10W out
of the radio until it cools down. Even at 70W output in RTTY, I should be
able to keep the temp down with the fans? I am wondering if I have
something set wrong?

Irwin KD3TB

On Saturday, January 2, 2016, Don Wilhelm  wrote:


Irwin,

Yes, I think that PA Temp setting *may* be too high, but it 'all depends'.
The PA Temp indication will follow the actual temperature of the heatsink,
so if your K3 has been on for a while, that 27 degC may be normal.
Follow the instructions in the manual to set the temperature.
First turn off the K3 and leave it off until the heatsink acclimates to
room temperature (at least 15 minutes, I recommend 30 minutes).
Then turn it on and go to the PA TEMP menu - set it to the room
temperature in degC.  For a 73 degF room, that would be 23 degC.

If I recall, the fan will not turn on until the PA Temp reaches 40 degC.

If you want the fan to come on sooner, set the PA Temp to a higher value.

73,
Don W3FPR

On 1/2/2016 4:55 PM, Irwin Darack wrote:


How do I set the radio to turn on the fans when then 100 w amp temp gets
to
a specific temperature.  I am playing around with the RTTY contest -
running 70 watts output into a tuned antenna.

With KPA3 set to NOR, the fans do not seem to turn on, even when the 100W
amp gets to high. I know the fans are working because when I set KPA3 to
FN
1 to 4, then fans run continuously at the appropriate speed.

PA temp is set to 27C.  Should this be lower?





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Re: [Elecraft] K3 audio response, big roll off observed

[Arie Kleingeld PA3A]

K3 #1255 with all mods: response as flat as a pancake up till 4 kHz.
(line-out into pc-soundcard)

73
Arie PA3A

Op 22-12-2015 om 14:56 schreef Joe Subich, W4TV:



On 12/22/2015 8:48 AM, on4iq wrote:

Listening via 6Khz filter
there is 15k 6k 2.8k installed
I just tried to listen in FM, useless, cut audio off above 3Khz even 
in wide

filter setting
image shows roll off with flat EQ



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Re: [Elecraft] K3IOB What do I gain by upgrading?

[Arie Kleingeld PA3A]

Nothing that improves the formidable K3 performance.

But still:
I could run the audio over USB instead of analog,
I could sell the usb-serial converter for CAT

For me the over the top price is a showstopper.
I'll keep my very cheap usb serial converter and audio cables. This old 
concept is a killer and performs very well. Works immedidately with any 
pc that I connect my K3 to. Never a driver issue.


73
Arie PA3A

Op 20-12-2015 om 1:53 schreef Harry Yingst via Elecraft:

I was curious as to what I would truly gain if I upgrade my K3 to the new K3IOB?


Thank you




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Re: [Elecraft] k3 SO2V

[Arie Kleingeld PA3A]

In your case there's one RX to receive one frequency at the time.
To monitor two freqs /at the same time/, you will need the Sub RX.

Arie PA3A


Op 30-11-2015 om 13:16 schreef simon m0vky via Elecraft:

hi

recently purchased and built a k3S, without the SUB RX.
i was under the impression that you could RX on the same band but on 
VFO A and VFO B.

ie, to RX the DX QRG and RX the pile up when working split.
this appears not to be so.
do i need to buy the SUB RX board to be able to do this or am i not 
doing something correct?


ps, fb rig.



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Re: [Elecraft] KPA500 no power out

[Arie Kleingeld PA3A]

Frank,

This looks like the problem I had with my KPA500 that turned out to be a 
fault in the T/R switch. My troubles also started on 7MHz.

There's a modkit for that: E850607. I installed it myself.

This has been in the reflector before. Look e.g. for the thread on 
KPA500 troubles of last October.


73
Arie


Op 5-11-2015 om 22:48 schreef n...@comcast.net:

Can someone advise me on the following?

My KPA500 (S/N 2663) Amplifier stopped working in the middle of a CW 
QSO on 7MHz.

It has been working flawlessly for the past two months (since new).

At the time:
Driver is a K3 running 20w and KPA500 running 400 watts.
Antenna tuner is a KAT500.
Antenna is a GAP Challenger.
Frequency was 7.07 MHz.
While transmitting, the SWR on the KPA500 went high and a Fault flashed.
The KPA500 seemed to reset its self and I continued sending.
The sequence repeated a few seconds later except that the KPA500 had 
no output power.

Further testing resulted in the following findings:

Reloaded the firmware.

K3, KPA500 and KAT500 was connected in accordance with Figure 1, Page 
5, of the Owners manual.
For the following tests, the output of the KPA500 was connected 
directly to the SWR meter and the SWR meter was connected directly to 
the dummy load eliminating the KAT500.


Frequency: 3.57 MHz, All works well.

Frequency: 7.07MHz, K3: (ON) 100w, KPA500: (Standby), SWR on KPA500: 
1, SWR on SWR meter between KAT500 and dummy load: 1.1:1
   K3 power reduced to 10w, Switch the KPA500 to Operate, KPA500 no 
lights indicating SWR or Power.  K3: SWR and RF indicators jumping up 
and down. Raspy tone heard in station monitor (TS-850).  The LCD 
shows: "7.0 MHZ" no matter which switch around the display I push or 
how many times I push them or how long I hold the switch.


Frequency 14.07 MHz, All works well.

The KPA500 (kit) is under warranty, anyone know what s going on here?  
Did I do something wrong?  Is it time to send it back to Elecraft?


Frank
N7FN





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Re: [Elecraft] KPA500 troubles

[Arie Kleingeld PA3A]

Failing pin diode switch ? (not the PIN diode itself, but the 
semiconductor switching it)


73
Arie PA3A



Op 19-10-2015 om 14:20 schreef W4GRJ:

All of a sudden my KPA500 is misbehaving. It sounds like it is arcing inside
and smells the
classic something is burning smell. SWR LED's are dancing upwards as it
arcs.
KAT500 tuner has the SWR around 1.3:1

I will probably send it off to Elecraft but thought I would ask here for
suggestions to
look at before I send it off.

Thanks, Jack
W4GRJ



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Re: [Elecraft] K3 or K3S: Whadayathink?

[Arie Kleingeld PA3A]

What do I think?

I think (repeat: THINK) that many K3 owners want the best performing 
transceiver, for whatever reason or just want to have the transceiver 
that's at the top of the chart of 'he whose name must not be mentioned'.
I upgraded my K3 -1255 with the SYN3A for future LF-reception and good 
QRQ-QSK in the present time.


Elecrafts strategy is unknown to me, and I don't care. But to stay in 
this business, they'll have to stay making the best stuff one can buy. 
The K3S could well be the interim TRX to keep the cash coming in, 
funding the development of the new direct digital sampled K4, that will 
blow every other comparable DSP-rig out of the water. Elecraft has the 
technology and know how for that.


So make your choice.

73
Arie PA3A



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Re: [Elecraft] (OT) Touchscreens

[Arie Kleingeld PA3A]

Touch screen on a transceiver:

- a vertical screen is not so easy to tap
- a touchscreen probably drives down cost

Arie PA3A
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Re: [Elecraft] Icom IC-7300

[Arie Kleingeld PA3A]

The versatility/flexibility of the K3 is unmatched.

The nice thing about the ic7300 is that it uses direct RF sampling, 
which is probably the way to go in the future. I'm not sure if the 
touchscreen will add real value for operating. I'll have to try.


As I wrote before, I expect that the K4 will be a direct RF sampling 
device, high performance, just as easy and flexible to use as a loaded 
K3/P3, and all the features.


73
Arie PA3A

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Re: [Elecraft] Different Reflectors for different models

[Arie Kleingeld PA3A]

Ingo,

I totally agree on your statement. One reflector with productname in 
subject line.

(Filtering options in my e-mail program (thunderbird) do the rest.)
With multiple reflectors, think about all that moderation... ;-)

73
Arie PA3A


Ingo Meyer, DK3RED schreef op 23-8-2015 om 17:30:

Hello Bob,

For those that might have a more or less interest in various 
products.


Oh no, please, don't do it! There is one (!) list for one (!) product 
- Elecarft! I also own only at the time a K1 and K2, so many topics 
are rather uninteresting for me. But I am also interested in other 
issues with other products (like antennas, power supply etc.) with 
other products.


At least put the model in the subject line.  That way I can eliminate 
automatically the

not interested items.


Yes, that's the right way!


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Re: [Elecraft] Linked VFO's -- usage?

[Arie Kleingeld PA3A]

Thanks for your support Guy.
I have addressed this subject several times in the past (with no 
success). I often use diversity in contests  (ever since I have my K3, 
which carries #1255).


Now that the K3 runs the diversity form one VFO and the problem of the 
filter offsets seems to be solved, this is the last thing to improve.


73
Arie PA3A

Guy Olinger K2AV schreef op 3-8-2015 om 23:29:

The counter to yet another mechanical outside box is that the ability
to write firmware and update it inserts another very major
possibility, that it can be done in the digital stream without need of
extra cords and boxes.

To use the mechanical box, we must physically route the audio to the
box and plug in the headphones there. We have to mount the box so it
doesn't move around. And worst of all, I have to make it.

My microHam box doesn't treat a/b audio in this manner. B audio is
radio 2 with its own stereo audio output. and it labels a pair of
stereo lines RX1 and RX2. That deals with a pair of radios, not
left/right stereo audio switching. So if I actually have two radios
hooked up to it, no way to use it creatively to do the tricks just
with the K3 in diversity.

If I take my K3 anywhere else, like NY4A for multi contesting, I lose
the function as what I get at NY4A is main antenna, RX antenna and
power from the station, rather than a double of my now unique home
station.

Putting it in the digital functions makes it instantly portable.

So, understanding your suggestion completely, and with no malice
whatsoever, I decline, and still lean to the future with something
that can be put in a macro stream sent to it from MM+ or whatever. I
CAN take my MM+ macros with embedded K3 program commands.

Feeding the A stream to the b audio just seems to be too easy in
firmware, it's already done for non-diversity.

Use of the diversity hold is problematic because it assumes that the
unwanted half of the headphone audio is in the subRX side.

73, Guy

On Mon, Aug 3, 2015 at 3:33 PM, Don Wilhelm w3...@embarqmail.com wrote:



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Re: [Elecraft] Linked VFO's -- usage?

[Arie Kleingeld PA3A]

Don,

I know what diversity is Don, and I use it as you describe.
It just happens that I sometimes need to concentrate on one channel only 
to make the QSO. That's where the A-A en b-b come into play. After 
finishing and logging the QSO,  I switch the K3 back into A-b with one 
simple keystroke F9.



73
Arie


Don Wilhelm schreef op 3-8-2015 om 17:05:

Arie,

The K3 may be in diversity, but you will only hear in diversity mode 
when the audio is A-b.
The diversity effect is 'in your head' as your ears naturally pick up 
the differences between the two receivers and your brain figures out 
which is the best to hear.


When you have the audio set to A-A or b-b, you are hearing the audio 
from only one receiver, and by definition, that is not diversity 
reception.


73,
Don W3FPR

On 8/3/2015 10:30 AM, Arie Kleingeld PA3A wrote:

Don,

to set things up, I use a macro programmed in the F12-key in N1MM to 
copy the freq/mode/BW  From A to B,  switch on the SubRx, set audio 
to A-b listening and Link the VFO's. Switching of the audio is done 
in F9-F10-11 to A-b, A-A, or b-b respectively.


Of course I would like that I could switch the audio when the K3 is 
in diversity mode, but That cannot be done in current Firmware. In 
diversity the audio is fixed to A-b.







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Re: [Elecraft] Diversity Reception

[Arie Kleingeld PA3A]

Bob,

This is how I often use the diversity of my K3 (it has the sub RX, and 
similar filters in Man and Sub RX)

- on 20m: one 3-el beam to NW on Main and a 5-el mono to NE on Sub
- on 160m: vertical on Main and receive 4-square on Sub
- on 40m: 3 el beam on Main, vertical on Sub
(It depends a bit on the antennas I can use at that time.)
If there's a weak station on one ear that I want to work, and loud 
signals come battering on my other ear, I'd like to concentrate on one 
channel to make it easier. Than I switch the audio to the channel I 
want. After finishing the QSO I switch back to diversity.


Yes, the antenna's are not more than 50m apart but they have a totally 
different receive pattern. I remember that during a DXpedition I was 
working with a beam and had a vertical on the other RX. The guys I heard 
on the vertical were copyable very well on the vertical. On the beam 
they were buried under the pile-up in the beam direction.


Diversity is such a nice feature of the k3.

73
Arie

Bob McGraw - K4TAX schreef op 3-8-2015 om 22:31:



  However, in my world, true diversity is attained from 2 
identical receivers,  each having a separate antenna in two different 
locations.  The source signal is a single transmitter. 

73 Bob, K4TAX


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Re: [Elecraft] Linked VFO's -- usage?

[Arie Kleingeld PA3A]

Vic,

I have the macro's  programmed under F9-F10-F11-F12 in N1MM logger.
The response of the K3 to the F-keys is swift. Switching Diversity on 
and off etc. is not as quick.

Do you use macro's for this Vic?


73
Arie
.

Vic Rosenthal 4X6GP/K2VCO schreef op 3-8-2015 om 5:35:


What I do is switch antenna connections. My secondary antenna is 
connected to both the RX ANT and the sub's BNC input. So I can listen 
to the main + secondary antennas in diversity mode, just the main 
antenna with diversity off, or just the secondary antenna (regardless 
of whether diversity is on or off) with the RX ANT switch on.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 2 Aug 2015 17:34, Arie Kleingeld PA3A wrote:

Hi all,

I might be one of few people who use the Linked VFO's in diversity, not
that I want to, but because I have to.

When listening to diversity I am stuck with the L-MIX-R setting to A-b.
Some times I want to switch from A-b to  A-A   or   b-b  and back again.
It is used when I need to listen to only one antenna because of very
weak signal or QRM via the other antenna to my other ear.
This switching cannot be done when the K3 is in diversity mode, which is
a pity. That's why I Link the VFO's. (All done with computer macro
commands of course).

It's probably not on the list for this to come in the firmware. It's
seems to be only Arie (me) that would appreciate the audio switching in
diversity :-)
The K3 is a very flexible radio, but not at this. If I only could switch
the audio when the radio is in diversity via a macro, that would be
enough. (Does not need to be from a front side button)

73
Arie PA3A

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Re: [Elecraft] Linked VFO's -- usage?

[Arie Kleingeld PA3A]

Don,

to set things up, I use a macro programmed in the F12-key in N1MM to 
copy the freq/mode/BW  From A to B,  switch on the SubRx, set audio to 
A-b listening and Link the VFO's. Switching of the audio is done in 
F9-F10-11 to A-b, A-A, or b-b respectively.


Of course I would like that I could switch the audio when the K3 is in 
diversity mode, but That cannot be done in current Firmware. In 
diversity the audio is fixed to A-b.


73
Arie PA3A

Don Wilhelm schreef op 2-8-2015 om 19:06:

Arie,

When in diversity, normally both the SubRX and the Main RX are 
controlled by VFO A.

You must be in SPLIT to do what you are doing.  Is that true?

73,
Don W3FPR

On 8/2/2015 10:34 AM, Arie Kleingeld PA3A wrote:

Hi all,

I might be one of few people who use the Linked VFO's in diversity, 
not that I want to, but because I have to.


When listening to diversity I am stuck with the L-MIX-R setting to A-b.
Some times I want to switch from A-b to  A-A   or   b-b  and back 
again. It is used when I need to listen to only one antenna because 
of very weak signal or QRM via the other antenna to my other ear.
This switching cannot be done when the K3 is in diversity mode, which 
is a pity. That's why I Link the VFO's. (All done with computer macro 
commands of course).







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Re: [Elecraft] Linked VFO's -- usage?

[Arie Kleingeld PA3A]

Dale,

That would be a nice work around, introducing another device  :-)  I am 
limiting the number of devices as much as possible.
Having it under the F-keys is just so nice. I wonder why no one asked 
for this before. At the club the K3 is really showing off when people 
use it this way.


73
Arie


d...@lightstream.net schreef op 2-8-2015 om 13:52:

Arie,

Haven't drawn this out, but couldn't you accomplish your headphone audio
routing requirement via a simple outboard switch or pair of switches
mounted in a small box?

73, Dale
WA8SRA



Hi all,

I might be one of few people who use the Linked VFO's in diversity, not
that I want to, but because I have to.

When listening to diversity I am stuck with the L-MIX-R setting to A-b.
Some times I want to switch from A-b to  A-A   or   b-b  and back again.
It is used when I need to listen to only one antenna because of very
weak signal or QRM via the other antenna to my other ear.
This switching cannot be done when the K3 is in diversity mode, which is
a pity. That's why I Link the VFO's. (All done with computer macro
commands of course).

It's probably not on the list for this to come in the firmware. It's
seems to be only Arie (me) that would appreciate the audio switching in
diversity :-)
The K3 is a very flexible radio, but not at this. If I only could switch
the audio when the radio is in diversity via a macro, that would be
enough. (Does not need to be from a front side button)

73
Arie PA3A





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Re: [Elecraft] Linked VFO's -- usage?

[Arie Kleingeld PA3A]

Hi all,

I might be one of few people who use the Linked VFO's in diversity, not 
that I want to, but because I have to.


When listening to diversity I am stuck with the L-MIX-R setting to A-b.
Some times I want to switch from A-b to  A-A   or   b-b  and back again. 
It is used when I need to listen to only one antenna because of very 
weak signal or QRM via the other antenna to my other ear.
This switching cannot be done when the K3 is in diversity mode, which is 
a pity. That's why I Link the VFO's. (All done with computer macro 
commands of course).


It's probably not on the list for this to come in the firmware. It's 
seems to be only Arie (me) that would appreciate the audio switching in 
diversity :-)
The K3 is a very flexible radio, but not at this. If I only could switch 
the audio when the radio is in diversity via a macro, that would be 
enough. (Does not need to be from a front side button)


73
Arie PA3A



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Re: [Elecraft] CW filter and Roofing filter

[Arie Kleingeld PA3A]

Cascading:
The only cascading filtering is first the xtal filter and then the DSP 
filter. (So there's only one xtal filter)


400Hz-500Hz:
Yes listening to a wider DSP filter than Xtal filter is pointless. 
Although (if configured correctly) the K3 will switch to a wider Xtal 
filter (if there is one) if you widen up the DSP.


Analog demodulation:
Demodulation in the K3 is DSP. There is not menu setting to get around this.


73
Arie PA3A

Gee schreef op 24-6-2015 om 14:55:

Trying to sort this out...
1) with any filter selected using the XFIL button on the K3, there is only ONE 
crystal IF filter in the signal path. In other words, there is no cascading or 
tail ending of the filters before and after the IF.
2) if I select a 400 Hz filter with the XFIL button then adjusting the DSP 
WIDTH control to any WIDER than 500 Hz is pointless.
3) can the DSP be bypassed to produce a purely analog demodulated audio to the 
speaker? As I recall years ago, some early DSP radios had this feature. I am 
pretty sure the answer is no but still, had to ask.
It is interesting to note that there are new hams out there who have never 
listened to an analog receiver before. It can be an eye opening experience!
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Re: [Elecraft] KPA-500 modifications

[Arie Kleingeld PA3A]

Johnny,

I have done that mod.

Reason was that my KPA500 had high SWR at the input and barely any gain. 
Tracked the problem down to the TR circuit. One of the switching Fet's 
(that switch the TR PIN-diodes) had died.
It proved to be an error that happened before, because for a lousy 12 
bucks I got all needed parts for a replacement in a mod-package from 
Elecraft. Coming with it were two C's to replace in the 12m LPF.  I 
replaced them in the same go.


Now all is well!


73
Arie PA3A


Johnny Siu schreef op 10-6-2015 om 0:46:

Does anyone have the any idea about the 'Factory upgraded w/ T/R circuit plus 
12-meter low pass filter mod'  mentioned in the advert. below?
73
Johnny VR2XMC
   寄件人︰ H. Cary h3c...@gmail.com
  收件人︰ elecraft@mailman.qth.net
  傳送日期︰ 2015年06月10日 (週三) 4:15 AM
  主題︰ [Elecraft] KPA-500 FOR SALE

For Sale: Elecraft KPA-500, serial # 0698, solid state linear amplifier, covers 160-6 meters.

Factory upgraded w/ T/R circuit plus 12-meter low pass filter mod on June 1, 
2015.
Amplifier meets or exceeds all factory specifications.
$1750 shipped CONUS.  Please contact direct: h3c...@gmail.com
Cary, K4TM




   
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Re: [Elecraft] KSYN3A

[Arie Kleingeld PA3A]

I installed two new SYN3A's yesterday in K3 #1255

A very positive surprise: The diversity mode has improved a lot. The 
'woosh'  during tuning has competely gone! Super.

A negative surprise: Tuning noise on 40m (S3 !) plus birdies.
I will install the tuning noise reduction mod (of 2009) now and see 
whether that helps and i'll move the TMP cables around to improve on the 
birdie problem.


73
Arie PA3A

Mike Reublin NF4L schreef op 3-5-2015 om 20:03:

What could I expect to actually hear differently (not lab measurements) after 
the installation of the new synths? I have no interest in freqs below 1.8MHz, 
I'm not a high-speed CW guy. I chase DX (SSB, CW, RTTY) and do a bit of 
contesting to that end.




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Re: [Elecraft] (Mini)P3 v SubRX

[Arie Kleingeld PA3A]

Yep,
That's how to do it. Followed the same strategy here and worked him 21 up.

73,
Arie PA3A

Don Butler schreef op 10-3-2015 om 19:31:

I apologize ...but sent the wrong link in previous email.  This is the link
to show monitoring the K1N pileup with KRX3 and P3:

https://vimeo.com/119076467

Don, N5LZ




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Re: [Elecraft] K3 Diversity on 160m?

[Arie Kleingeld PA3A]

Jim,

On 160m
For TX: 5/8 wave inverted L
For diversity RX: RX-4-square

73
Arie PA3A

Jim Miller schreef op 18-2-2015 om 1:17:

What are folks using for their two antennas to provide improved reception
on 160m? I have a recently installed 2 element vertical RX array and
thought the next step would be trying diversity but not clear that my only
other 160 antenna (inverted L) would be sufficiently different to be of use.

Thanks

Jim ab3cv


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Re: [Elecraft] K3 Beta 5r10 and LINK

[Arie Kleingeld PA3A]

Vic,

When the K3 is in diversity, it is in diversity, meaning that Main RX is 
on left ear and Sub Rx on right ear. This cannot be changed.
Often, it is convenient to switch to only one antenna and one audio 
instead of two. So if a signal is really good on the Sub RX, I switch to 
B-B, meaning both ears hear the Sub RX audio. After finishing the QSO I 
switch back to A-B, the normal diversity audio and go on in diversity.
This trick cannot be done if the K3 is in diversity. So I have the K3 in 
LINK-mode so that both VFO's stay toghether on the same frequencies.


If the audio switching would be available when the K3 is in diversity 
mode, I would not need LINK. Now it is my way of working around this.


73
Arie PA3A


Vic Rosenthal schreef op 16-2-2015 om 9:22:

I don't understand. The K3 directly supports dual diversity reception. The beta 
makes it possible to enter diversity mode with a normal hold of the SUB button 
instead of the previously required long hold.

The LINK function makes the two VFOs tune together, and they can be on the same 
frequency. But it isn't needed for diversity and would be clumsy to use for 
that purpose for several reasons (extra button pushes to equalize frequencies, 
bandwidth, etc.; possible need to change audio mixing setting).

LINK is not the same as diversity, and I have never figured out what it is good 
for.

Vic 4X6GP/K2VCO



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[Elecraft] K3 Beta 5r10 and LINK

[Arie Kleingeld PA3A]

Wayne,

Please do not take out LINK. I'm using it a lot in contests and in 
DXpedition work


Just to give you and others the idea:
With both main and sub RX's on the same freq, mode  and BW  I link them 
with LINK.
But here comes the fun part. When working with the N1MM logger I use 
F9-F12 to quickly command the audio from the K3 main and sub:

- F9 = listen A-B
- F10 = listen A-A
- F11 = listen B-B
- F12 contains the commands to copy VFO freq and mode from A to B and 
LINK the VFO's.


This unique flexibility of the K3 is impossible in the DIVERSITY mode.
so P L E A S E , keep LINK in there.

73
Arie PA3A

Wayne Burdick schreef op 15-2-2015 om 5:04:

Mike (et al),

It's beta, experimental, subject to further revision. We took the original 
dual-PB out based on earlier feedback suggesting no one was using it (same with 
LINK). APF, in contrast, has been hugely popular. But with this input, we'll 
reconsider.

Thanks,
Wayne




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Re: [Elecraft] K3 Beta 5r10 and LINK

[Arie Kleingeld PA3A]

Tony

LINK ties both VFO's to the mail freq dial en keeps them insync when you 
turn the dial knob.

So both receivers keep working on the same freq.

What I often use i diversity listening so with two receivers and two 
antennas on the samen freq.
Diversity puts the main RX audio on the left ear of the headset, and the 
Sub on the right ear. That's the normal situation.
In my case, the F9-F12 buttons in N1MM contain commands to the K3 that 
switch the audio to my liking (that can  also be done in the Config, but 
that takes too much time during QSO) This way I can switch listening 
from diversity (listen both MainRX and SubRX at same time) to only main 
RX (main RX audio on both ears)   or only sub RX (Sub RX audio on both 
ears) depending on where the signal is best.
The commands to do this are in the programmers manual of the K3. It's 
really fun to control some beautiful K3 features from the keyboard like 
this.


73
Arie PA3A




N2TK, Tony schreef op 15-2-2015 om 16:38:

Hi Arie,
I am not sure I understand what LINK does to help when both receivers are on
the same freq. What does F9-F12 below do to help?
Tnx
N2TK, Tony

.

- F9 = listen A-B
- F10 = listen A-A
- F11 = listen B-B
- F12 contains the commands to copy VFO freq and mode from A to B and LINK
the VFO's.




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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

[Arie Kleingeld PA3A]

Wayne,

That sounds interesting. Before investing in two modules I'd like to 
know how much the dynamic range will change. Could you share some 
relevant measurements?


73
Arie PA3A


Wayne Burdick schreef op 13-2-2015 om 7:07:


* ULTRA-LOW PHASE NOISE

The KSYN3A significantly improves the K3's already excellent receive and 
transmit phase noise characteristics at close carrier spacings. This, in turn, 
improves its close-spaced receive dynamic range, yielding even better weak 
signal detection in the presence of strong signals. In transmit mode, the 
KSYN3A keeps the signal exceptionally clean, further enhancing K3 performance 
at multi-transmitter stations, Field Day and DXpeditions.



73,
Wayne
N6KR



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Re: [Elecraft] Reverse Split???

[Arie Kleingeld PA3A]

Bruce,

There are a few top-of-mind options:
- the connected antennas to the two RX's (AUX and MAIN)
- the use of the RX ant port
- RF and AF settings of both RX's

73
Arie PA3A


I checked and double checked the settings for both RX to ensure I didn't
have something turned on the Main that was causing me not to be able to hear
him. Both Main and Sub were set up the same.  I could hear him on the Sub,
but not the Main, weird.

Also, playing in the 160 m contest, I noticed that the Main RX is hearing
signals the Sub is not.  Even when I have both on the same Freq there is a
noticeable difference in what the Main and Sub are hearing.

Ideas?

73 de Bruce, N7TY
White Plains, MD


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[Elecraft] K3 : 8 ERR messages

[Arie Kleingeld PA3A]

Hi all,

Starting this week, my K3 #1255 (year 2008) started showing ERR messages 
when I swithed it on.  First ERR message was ERR BP1.

After pressing any button of the K3 the following messages appeared:
ERR LPF, IO3, IF1, XV3, AT3, PA1 and BP3.

After cycling through these messages, they are gone and everthing works 
as normal.
Switching the K3 off and on again immediately after that, the same thing 
happens again.


Switching the K3 off and on after 5 mins of operation, everything is 
normal, no messages at all.


Could  this be caused by an empty back-up battery? Wonder if other 
owners had a simular problem.


73
Arie PA3A


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Re: [Elecraft] RTTY tail

[Arie Kleingeld PA3A]

Did you send didit  dahdah  or diditdahdah?
The second should work.

73
Arie PA3A


Stephen Reichlyn schreef op 22-1-2015 om 17:08:
I'd love to know the secret of defeating the long tail after a rtty 
transmission. Ive been told to send the prosign IM but it has

never worked. Any hints?

73,
Steve AA4V

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Re: [Elecraft] s/n ratio of this list

[Arie Kleingeld PA3A]

No need for another list.

Sort on names or subject works just fine.

73
Arie PA3A

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Re: [Elecraft] [K3] NaP3 / CW Skimmer integration using only K3 as RX

[Arie Kleingeld PA3A]

John,

My standard setup here is:

Software:
- CWskimmer
- NAP3
- N1MM logger
- a simple piece of software called ' clusterjoin'
- LP Bridge
- systems: Win XP (until last month) and Win Vista (present time)

Hardware:
- K3
- Softrock -IF
- 6 yr old pc with 192kHz soundcard

Way of operation:
- All software is connected to the K3 via LPbridge
- N1MM is connected to 'clusterjoin' in the telnet window
- Spots of CW skimmer and an internet DXcluster are combined through ' 
clusterjoin'  (commands to accomplish this are given via the telnet 
window of N1MM logger) , all spots show up in the bandmap op N1MM logger.


Everything works together just fine. Thanks to all programmers of the 
software that make this possible.

If you have any questions, just contact me.

73
Arie PA3A


John Shadle schreef op 14-1-2015 om 19:32:

Hi all,
I know that I have seen a blog post by a non-US ham about doing this, but I
can't seem to locate concrete instructions on his site or elsewhere.

My setup is as follows.
- K3
- LP-Bridge to share serial ports for rig control and logging
- LP-PAN using NaP3
- E-MU 0202 USB sound card

NaP3 works fine with this setup, but I can't get CW Skimmer to load while
NaP3 is running. Once I shut down NaP3, I can run CW Skimmer with no issues.

Anyone have tips on how to use both NaP3 as well as CW Skimmer
simultaneously with this setup?

Thanks!
-john W4PAH
Madison, WI


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[Elecraft] KAT500 tuning in combination with K3

[Arie Kleingeld PA3A]

Dick,

Now that you are 'on the air'...

Pressing the tune button on the KAT500 means that I want to tune. 
Wouldn't it be nice if the K3 (automatically) gives a tune signal when I 
do that?


Is that somewhere on the list? Or will this never become reality?


73
Arie


Dick Dievendorff schreef op 14-11-2014 8:04:

You weren't the first to ask for this. You can enable or disable antenna 
connectors by band with the KXPA Utility. See help text and the Configuration 
tab.

Use current production versions of firmware and the Utility.

73 de Dick, K6KR




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Re: [Elecraft] Interesting K3 QRM problem

[Arie Kleingeld PA3A]

Vic,

Cannot really tell what's happening, but I have a suggestion for your BC 
bandfilter.
Connect the filter to the RX ANT in and out connectors, and switch on 
the RX ANT.


Now you can transmit the normal way and use the filter for receive only.

73
Arie PA3A

Vic Rosenthal 4X6GP/K2VCO schreef op 23-10-2014 12:58:

snip
I tried one more experiment: I have a BC band filter which is used 
with the MFJ antenna analyzer when there are nearby BC signals. Sure 
enough, putting this in series with the K3 ANT 1 connector kills the 
noise. Of course I can't transmit through it.


Has anyone had a similar problem? I am thinking that the solution is a 
highpass filter or trap at this spot. I don't operate on 160, so it 
shouldn't be too hard to make.



snip
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Re: [Elecraft] Purchasing K3

[Arie Kleingeld PA3A]

Alan,
Lots of anwers have been given.

One more: Usually those electrets have 3,5 mm connectors. Use the back 
panel as an entrance for the mic. No need for a front panel microphone plug.
Actually, I never used one with my K3.  I have had several mics 
connected to it, all with a 3,5mm connector. The K3 will accomodate 
electrets and dynamic mics.
The Elecraft K3 is a very flexible machine, and most things are very 
well thought of. This is one of them.


73
Arie PA3A

G4GNX schreef op 14-10-2014 18:34:

Hi all.

snip

I presume that I will have to order a front panel microphone plug from 
Elecraft, in order to use one of my electret microphones?


Thanks in advance.

73,

Alan. G4GNX
snip


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Re: [Elecraft] Zero-beating on CW

[Arie Kleingeld PA3A]

Hello Ted,

When I need to be on zero beat within one Hz,  I always switch on the 
spot on the K3 and set the received signal to the same volume.
Once I hear the combination of both increase and decrease slowly, I know 
that I am within a Hz. It's also the way I calibrate the K3 against a 
standard like WWV or the russian station on 9.996 / 14.996 (forgot the 
callsign).


73
Arie PA3A

Ted Edwards W3TB schreef op 5-10-2014 12:44:

I have never been convinced of being accurate on zero-beat on my K3.
With previous radio units, I would zero-beat by matching the tone of the
received station with my own keying side-tone.  But it does not seem
accurate on the K3.

So the question:  How would I determine that my offset and side tone would
match up so that I am really zero-beated when I think I am.

Thanks ahead of time.



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Re: [Elecraft] Zero-beating on CW

[Arie Kleingeld PA3A]

Mike,

Only when calibrating the K3 freq I tune within one Hz. Performing the 
Ref-Cal.

That's all.

73
Arie PA3A



Mike Harris schreef op 5-10-2014 13:49:
Any particular reason to need to zero beat to 1Hz?  I find the auto 
tune function works perfectly well.  In fact if I'm one of many 
stations calling I often offset 40-50Hz so as to be different from the 
all zero beat mush.


Regards,



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Re: [Elecraft] Low Serial Numbered K3

[Arie Kleingeld PA3A]

Hi all,

My serial number 12xx is not as low as some, but I had my share of mods 
in the K3.
I've done them all myself including adding the LPF on the DSP board 
(which was an improvement in my case).


Implementing the mods was never a problem, thanks to the good 
documentation on the elecraft website and all info in this reflector.


As for firmware, I follow all updates. Never regretted that.
(It becomes vital if you start adding a KPA etc. There have been several 
updates that improved the overall performance.)




73
Arie PA3A
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Re: [Elecraft] [K3] Roofing filters are misunderstood

[Arie Kleingeld PA3A]

Well,

You defenitely need those filters in the K3.
When signals are strong and the band is busy, signals coming through the 
roofing filter (line S9+20dB) is said to pump the hardware AGC, even if 
you have the DSP filtering set to a small BW. Anyway, you can certainly 
hear that.
Try it on CW,  on 40m in the evening when there's a contest. You'll love 
the 400Hz roofing filter.



73
Arie PA3A




Al Lorona schreef op 11-5-2014 23:03:

What determines the bandwidth you hear at the loudspeaker? It's not your 
roofing filter, despite a continuing notion that it is.
  
Dave Hachadorian's point in a post a few weeks ago was that you don't need a 1.8 kHz filter to get a 1.8 kHz bandwidth. You're free to set whatever bandwidth you want with any filter.


Before rigs had DSP we got used to the idea that your crystal filter sets your 
bandwidth. That's not true any more. It sets your *maximum* bandwidth. You then 
have the freedom to narrow and position a bandwidth arbitrarily using the DSP 
controls [SHIFT and WIDTH or HI and LO].


Here's a true-false quiz:

  
1. I'm a contester, so I need a 1.8 kHz roofing filter in the K3.
  
2. I should purchase the 400 Hz filter if I like to operate CW with bandwidths of 300 - 400 Hz.
  
3. For SSB, the 2.7 and 2.8 kHz filters are 'too wide'.
  
4. I have the 2.7 kHz filter installed, so for best results I should set my WIDTH control for a passband of 2.7 kHz.
  
5. I can use my 2.7 kHz filter in CW mode with my LO=0.30 and HI=0.50 (that is, BW=0.20).
  



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Re: [Elecraft] K3 - Sub RX audio to right Line Out

[Arie Kleingeld PA3A]

Hi Buck,

You are talking about Line-out of the K3.
First question is: is it working ok with your headset on? So can you 
hear the subRX that way?

If that is working as it should then do the next check:

First thing to look at: To what is the line-out connected?
If you connect it to a stereo computer speaker set, that is a good way 
to check.
(Checking it by connecting it to a laptop mic-input is not a good check. 
Some laptops have a mono mic input.)


73
Arie PA3A


K4ia via Elecraft schreef op 29-4-2014 4:32:
I am trying to set up the K3 Sub Rx audio to come out on the right 
Line Out.   I hear nothing on that side.  The Main Audio is fine on 
the left side.


I can't find anything about a setting that would control this.  I 
thought it would be automatic.


Can someone point me in the right direction please?



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Re: [Elecraft] K4?

[Arie Kleingeld PA3A]

Nice try TJ,

No need for that here though.

73
Arie PA3A



TJ Campie schreef op 24-4-2014 22:07:

Can we get one of these?




73, W0EA
TJ



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Re: [Elecraft] CW Skimmer/Soundcard Connection

[Arie Kleingeld PA3A]

Hi Mark,

Yes, if the skimmer is hooked up via audio, that's what will be decoded.
Line-out here is set to 10. Ok  in my case.

Experiment a bit withe the soundcard volume/level settings and it will 
work for you.


73
Arie PA3A

pastor...@verizon.net schreef op 10-4-2014 1:15:

Good Evening, I have just hooked up the Line Out on the back of the K3 to the 
Input of my Soundblaster USB Card. In the K3 Manual it talks about the Config. 
Line Out to set the level. What number should I be setting mine at? Also, I 
assume that if I use my filters that it will limit the number of signals that 
CW Skimmer will hear. Any help would be greatly apprreciated. Mark Griffin, KB3Z



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Re: [Elecraft] Connecting CWSkimmer to my K3

[Arie Kleingeld PA3A]

Hi Mark,

A very simple and unexpensive solution that I use is:
- IF-softrock connected to the K3
- ASUS xonar D1 soundcard capable of 192kHz sampling, but a 96kHz rig 
will do

- Software: LP bridge and NAP3-sdr

I connected the skimmer to a LP bridge internal comport, did the same 
with N1MM logger and NAP3.
Makes a nice system altogether, thanks to the supersoftware. It all runs 
on a old pentium IV.


(It also works great on a 3 yr old Laptop that just happens to have a 
stereo mic at 192kHz.)


73,
Arie PA3A




pastor...@verizon.net schreef op 4-4-2014 6:16:

Good Morning, This is Mark Griffin, KB3Z and I am seriously considering using 
CWSkimmer with my K3. But it seems that some of the sound cards that I might 
use are not available. I have heard about the SDR-IQ, but I don't think I can 
connect that to the IF Output on the K3 and still use it for CWSkimmer. Has 
anyone used CWSkimmer with their K3? And I hate to ask a stupid question, but 
how did you connect everything to get it to work? Any help or suggestions, 
would be appreciated. Mark KB3Z



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Re: [Elecraft] Help - Elecraft Shutting Down

[Arie Kleingeld PA3A]

Ron,

This sounds like the 12V ERR which is caused bij bad connectors between 
the final 100W PA and the rest of the K3.
Older K3's can run into this error (my #1255 also about one year ago). 
It can be resolved easily.


73
Arie PA3A



N6SC schreef op 3-3-2014 22:43:

Elecraft K3 – The radio just started turning off and shutting down during
this weekends contest.  No changes have been made to the station in over 6
months so nothing was done that may be suspect.  Radio has both 10 and 100 W
output, and typically run 40 watts out into an Alpha 8410 for drive.
Troubleshooting,  I throttled the output back to 10 watts, I can operate no
problem and increased it in 5 watt increments. It start shutting the radio
down at around 25 watts.  Is there something I should try or does it need a
trip back into the factory??

Tx

Ron
N6SC




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Re: [Elecraft] K3/KPA500/KAT500 revs 4.83/1.38/1.58

[Arie Kleingeld PA3A]

I think I found a little thing to improve.
the KAT500 can miss a frequency update from the K3 in a certain situation

To replicate:
- Switch everything on and operate the KAT/KPA/K3 combo as usual with 
KAT500 in manual mode
- Activate the KAT500 utility for monitoring the KAT500 and select the 
Operate tab, here you can see the last observed frequency. See that 
KAT500 follows theK3 freq and switches accordingly.


Now
- set the KAT to BYPass
- Change K3 freq, note that the KAT500 freq info does not follow this.
- Switch KAT to MANual, note that the freq info is still not there
- now transmit with the K3, note that the KAT detects the frequency now 
and switches to the appropriate setting (the old way).


Improvement = KAT500 follows K3 freq in all KAT modes. so also in 
BYPass, and switches to the right setting as soon as you switch to 
MANual or AUTO.



73
Arie PA3A
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Re: [Elecraft] K3/KPA500/KAT500 revs 4.83/1.38/1.58

[Arie Kleingeld PA3A]

Yes,
The KAT500 needed to be powered first. I also used to do that. That was 
in the 'older firmware times'.


With the current FW, up till now  I never bumped into any issue no 
matter which device was turned on first.


Arie PA3A


Jack Brindle schreef op 21-2-2014 20:34:

The KAT500 needs to be powered on whenever the K3 is on in order to avoid 
loading the Auxbus. It can be powered up at the same time, but must be on 
before the K3 completes its initialization.

The KPA500 has no restriction, and can be powered on any time before or after 
the K3 is turned on.

Jack Brindle, W6FB

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Re: [Elecraft] Buying a new K3/100 kit - Top 3 options?

[Arie Kleingeld PA3A]

Yep.

My top 3 as well.
(BTW: The KXV3 is very useful, also when you have no intention to add a P3)

73
Arie PA3A


Dave Perry schreef op 21-2-2014 5:55:


K3/100
KAT3 Auto tuner plus second antenna port
KXV3A RX Ant., IF Out and Xverter Interface -- for adding a P3 later
400 Hz 8 pole filter for CW and RTTY

That would be my top three options for general DX and CW operation.

73,

Dave, N4QS




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Re: [Elecraft] Crystal Filter Offset in 4.81, What does it mean?

[Arie Kleingeld PA3A]

Lyle,

What are you saying here?
The DSP filtering as a second IF would do (and I quote you) a /terrible/ 
job. :-)


73,
Arie PA3A


Lyle Johnson schreef op 5-2-2014 16:35:
snip
The center of the passband to the nominal pitch value only occurs at 
higher pitches and/or narrower passbands.


Think about the case where you have 1.5 kHz width selected and a pitch 
of 500 Hz.  You defintely do NOT want the center of the filter and the 
pitch to be equal,or you'd have /_terrible _/opposite sideband 
suppression.




snip

73,

Lyle KK7P


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[Elecraft] KAT500 FW01.54 beta Configuration VSWR Thresholds

[Arie Kleingeld PA3A]

KAT500 FW 01.54 beta
KAT500 Utility 1.13.5.12 for Win.

As far as I know I could set the VSWR thresholds for Autotune and Bypass.
These show up empty when I connect the KAT500 Utily to the KAT500 and 
tried to change the settings.


73
Arie PA3A
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Re: [Elecraft] Crystal Filter Offset in 4.81, What does it mean?

[Arie Kleingeld PA3A]

Don,

I understand this.

Let me explain my thoughts.
Let's suppose we have the different IF's. One analog, the 8Mhz stuff, 
and then a DSP IF which is fed by the second 15kHz IF.


I am not a DSP expert. But I would expect that the DSP filter would 
filter out whatever bandwidth I would want it to, just like it were 
analog and better. I expect this function of any IF filter, digital and 
analog.
What we are tallking about is that the opposite sideband can pass 
through the analog part of the K3 (because of the wide roofing filter) 
and yes it does if the skirt of the filter allows it. If this is not 
solved in the DSP, the /function/ of the DSP is not more than the old 
type audio DSP filter we had in the old days (apart from partly being 
inside the AGC-loop)


As Ralph DL5OAP already stated: Even the old FT1000MP with DSP 
demodulation killed the opposite sideband. I had an MP for a long time 
(before I got the K3) and I can confirm this. I had it switched on all 
the time.


As you said Don, the K3 really needs the analog roofing filter to be in 
place to reach its best performance. Good thing that I have them for the 
bandwidths I use. And overall it works pretty well. There are still some 
things to improve though.


73
Arie
(not Arnie  :-))


Don Wilhelm schreef op 6-2-2014 17:21:

Arnie,

Think about it this way -- take a filter width of 1500 Hz and a 
sidetone pitch of 600 Hz.
If you center the passband at 600 Hz, the upper passband limit will be 
at 1350 Hz, but the lower edge will be 150 Hz into the opposite 
sideband (single signal reception goes bye-bye).


The proper position if the passband is to place the lower edge at 
about 100 Hz, and the upper edge will extend to 1600 Hz.


That is true for any passband that is greater than 2 times the 
passband width.


73,
Don W3FPR


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Re: [Elecraft] Would anyone like to see an all-mode VHF/UHF offering from Elecraft?

[Arie Kleingeld PA3A]

No, not interested.

73,
Arie PA3A
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Re: [Elecraft] KAT500, KPA500, KAT3 - tests done

[Arie Kleingeld PA3A]

Bill,


Thanks for sharing this.

Anyway, stray rf or no stray rf, it must be solved. We'll see what the 
engineers of Elecraft come up with.


73
Arie PA3A


Bill W2BLC schreef op 10-1-2014 13:09:
snip
Just for grins, I connected my faithful properly designed mil-spec 50 
Ohm dummy load to antenna output connector #3 on the KAT500. I then 
transmitted a signal on 3900, allowing the tuner to do its thing (per 
proper instructions). Then I proceeded to talk to myself for a couple 
of minutes on the dummy load - mimicking a QSO. Sure enough - the 
tuner did its usual hunt and seek retune after about 40 seconds. This 
is the same it does when actually on the air with a real antenna 
connected.

snip

Bill W2BLC K-Line(?)


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Re: [Elecraft] KRX3 input protection

[Arie Kleingeld PA3A]

Steve,

the subRX of the K3 has its protection (an rf triggered relay if the 
power coming into the rx is too high).


I've used the K3-KPA500 on a beam and I had a diversity vertical 
connected to the subrx quite next to it. No problem at all.
It all depends on the coupling of the antennas. Try and see how you go 
at your QTH; the subRX is protected.


73
Arie PA3A

AD0ES schreef op 3-1-2014 15:23:

Hi all,

My KRX3 is on the truck and due tuesday.  Quick question:  I will be running 
the main receiver on a receive only antenna
fed via the KXV3A and the subrx via its bnc aux.  These antennas are quite 
close to the xmit antennas.  Should I use
any sort of attenuation and/or external TR switch on either of these receiver 
inputs?  I eventually will be running a KPA500
full power...

tia,
Steve AD0ES


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Re: [Elecraft] OT: 2 port 50 ohm RX splitters

[Arie Kleingeld PA3A]

HNY all,

A receive-splitter is a thing that is easily built guys.

Look on W8JI's site and search for combiner or splitter.
I constructed a few magic T splitters myself and they work just fine.

73

Arie PA3A




On 12/31/2013 09:04 PM, als...@nc.rr.com wrote:
A while back there were some postings on recommended commercial 50 
ohm two port splitters for receiver use.



73 de Brian/K3KO



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Re: [Elecraft] Noise Cancelling Headphones

[Arie Kleingeld PA3A]

Tony,

I'm using the Heill covers that others use for the headset pro on my CM500
98% fit.

73
Arie PA3A


N2TK, Tony schreef op 26-12-2013 14:20:

Is there such a thing as a noise cancelling black box you can plug in a
headset such as the CM-500 and get good noise canceling? No knobs. Just an
ON-OFF switch like the headsets have.

And thinking of the CM-500. Has anyone found a set of material covers that
fit their ear covers? I would think they would be more comfortable than the
plastic against your head. And they would look better than the pieces of
paper towels I presently use when wearing the headphones for extended
periods. :-)

73,
N2TK, Tony



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Re: [Elecraft] Yamaha CM500 phones

[Arie Kleingeld PA3A]

No idea where to get those replacements.
What I did with my earpads is cover the pads  with the soft protection 
clothing that Heill provides for their earpads. Not a 100% fit but 98% 
is just fine.


73
Arie PA3A

Roy Koeppe schreef op 22-12-2013 10:49:

...I ask the same question:  Has anyone found a source for Yamaha CM500
replacement pads?...



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Re: [Elecraft] Updating an older K3

[Arie Kleingeld PA3A]

Dave,

No noticeble tuning noise in my K3, so I did not do that one. Not in 
main, nor subRX.

Seeing how it's done, it should be an easy job.

73
Arie PA3A




Dave Lankshear schreef op 18-11-2013 0:00:

Did you make the VFO tuning noise reduction mod, Arie?  My tuning noise was
very bad until the mod was applied.  It certainly made a lot of difference.

  


73 Dave G3TJP

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Re: [Elecraft] Updating an older K3

[Arie Kleingeld PA3A]

Hi all,


My K3 is a #1255.

I've done all the  mods myself. I'll give you a roundup of that , with 
the results:



*Solving a problem:*

- K3 Synth ALC = That was a really necessary one, I had that problem and 
it needed to be fixed


- K3 external ALC Mod = Necessary since I started to use ALC when I 
bought rhe KPA500. Before that I used all Amps without ALC. Actually, 
now Ithat  use the KPA500, the ALC is set at such a level that it well 
never react :-)


- 12V ERR mod (13.8V supply to PA in K3 fails due to bad connectorpins) 
= Had this problem last year. Decided to make the Field-fix instead of 
changing the connectors. This means bridging the connectors with a wire. 
Easy! Good chance that you will run into the problem at some point.



*Improvements:*

- IF output Buffer Gain  = Good mod! I am using a softrock and NAP3 for 
a bandscope om my stations pc


- AF stage upgrade (line out and speaker amp)  = Yes, it helps

- K3DF DSP Low Pass Filter installation = It really makes a difference. 
*Do this one*. I noticed that I could sit at the K3 for much longer when 
I  participated in a contest.


*
**' Maybe'   Improvements*:

- Front panel Macrophone Circuit MOd = No difference, I had no problems 
before that but I did this one together with the LPF installation


- Improving Immunity of the rear panel RS232 and audio connectors = No 
difference because I did not have any problem before the mod.



*
**Precautions*:

- K3 AF amp output mod = just a precaution. Never had a problem since I 
use stereo computer speakers and not a mono speaker.


- K3 automatic Frond End Protection = Just a precaution. No difference 
noticed, I did not have a problem before the mod.



I hope this list helps you to decide what to do.


73
Arie PA3A




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Re: [Elecraft] K3 / KPA500 / KAT500 Tuning

[Arie Kleingeld PA3A]

Hi all,

Now that we are talking about the tuning of the K3 line. As a matter of 
fact, I have the K3-KPA500-KAT500 combo and when tuned, it workes just 
fine.All is working as it should but still, this combunation can do much 
better. The tuning process is not so smooth as I would expect  it to be. 
The K3 line is supposed to have great integration, and I dare to say: 
yes it has integration BUT up to a certain level.

Yes, we have bandswitching in place (everybody has that)
Yes, the KPA goes off line when tuning and fires immediately after the 
tuning process (good from Elecraft).
Yes, the KAT remembers the setting per band and per band segment (not 
special)

In total: absolutely Good.

Here's what I miss and why.
I often take the K3-line with me to other places, and at home my 
antenna-impedance reacts to rain pretty quick so retuning is often 
necesarry.
The tuning proces is not as I would expect from a well integrated line. 
I have to press two tune buttons to do so, switch on the K3 signal (tune 
button) and then press the tune button on the KAT500. After that, stop 
the signal from the K3 (tune button again)


How smooth would it be that I could press the tune button on the KAT500 
and the KPA500 would go to standby (it does that already) and the K3 
gives the tuning signal automatically as long as the tuning process of 
the KAT500 needs it. This would then work the same way as the tuning of 
the K3 and its internal tuner.


Off course I would like the badsegment info for the KAT500 transferred 
from the K3 via the AUX cable instead of plain RF, but that has been 
discussed many times. I wonder if it could be done like this: send the 
bandsegment info from the K3 as soon as the K3 gives PTT. How is this 
done inside the K3? It switches the tuner to the right bandsegment 
setting when the PTT goes to on.


Does this give an opening to programmers or is it just impossible 
because of the hardware that is involved? Then I'll be silent :-)



73
Arie PA3A


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Re: [Elecraft] Tuner issues

[Arie Kleingeld PA3A]

William,

I know exactly what you mean.

It would be a nice feature that when I press the tune button on the 
KAT500, it would key the K3 at the same time and put theKPA500 in 
standby (if you have one).


Elecraft shines in clever layed out equipment and firmware. This would 
be a logical feature to add to the firmware.



73
Arie PA3A




William Levy schreef op 7-11-2013 15:23:

One thing that stumped me and cause me all kinds of grief was what button I
was pushing.
Reminder to those who may not know. The Internal K3 tuner runs when you
  press ATU TUNE
The external KAT500 tunes when you push and hold the XMT button.

If you tune internally the external KAT will show all kinds of SWR reds and
yellows.
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Re: [Elecraft] K3 - removable faceplate

[Arie Kleingeld PA3A]

Bill,

There were actually pictures of that. The K3/0-mini it was called. It is 
an interesting product.

There is a video on youtube, just look for K3/0 mini .


Arie PA3A


Bill W2BLC schreef op 7-11-2013 15:00:
At some point in the past there was a conversation regarding a 
removable or remote faceplate for the K3. Something along the lines of 
the Kenwood TS-480. Whatever happened to the idea?

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Re: [Elecraft] Tuner issues

[Arie Kleingeld PA3A]

John,

That sounds equally good.

Let's hope somebody at Elecraft picks this up. It will smoothen the 
operation of the K3-line still more.



BTW, I had the K3-KPA500 combo  with me on the TN2MS DXpedition in 
October. Without the KAT500 ( not need for it there). That was smooth 
operation from Congo.


73
Arie


John Reilly schreef op 7-11-2013 20:09:
I have a slightly different idea about how I would like it setup: I 
would like the K3 to be configured for either the Internal or External 
tuner (or none). When you press the ATU Tune button on the K3, it 
tunes whichever one it is configured for (and puts the KPA 500 in 
bypass).


- 73, John, N0TA


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Re: [Elecraft] K3 internal SWR meter

[Arie Kleingeld PA3A]

Don,

As always you hit the nail the first time right :-)

In 2012 I built my own SWR meter with a microcontroller readout for Pwr 
and SWR. This was one thing i had to fix in the software.


73
Arie PA3A


Op 22-9-2013 21:36, Don Wilhelm schreef:

Jorg,

You said the SWR meter spikes up to and SWR of 3.  I suspect that is 
simply an 'artifact' of the sampling of forward and reverse power 
combined with the varying characteristics of the SSB RF envelope.





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Re: [Elecraft] err 12 v problem

[Arie Kleingeld PA3A]

I think I had the 12V error 10 months ago  (K3 #1255).
The 100W PA drops off-line and the K3 falls back to the 12W driver-amp.

Elecraft sent me the necessary parts to cure this problem in the mail. 
They also provided me with the quick (not dirty) field fix (6 pictures) 
in the e-mail.

Did the last one. Easy job.

No problems ever since. I'll forward the field fix directly to your address.

73,
Arie


Op 20-9-2013 14:13, Dave Wank schreef:

Hello.I just thought I would also ask the group what to do about a err 12 v 
message on my K3.I contacted support but I probably wont get an answer until 
later today.I would be very thankful for any help or information about this 
message.Thanks...Dave NK8A 
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Re: [Elecraft] K3 NR needs improvement

[Arie Kleingeld PA3A]

Yes, The NR needs improvement (at least on SSB) and the notch should be 
inside the AGC loop. It has been said so many times before.
I know there are people who use the K3/IF - softrock/lp-pan - 
comuterSDR-software combo in same cases instead of the K3 SDR. H,


The NB's (DSP and hardware) both work as I would expect.

In de upcoming TN2MS DXpedition I will use the the K3-NR on 160/80 CW. 
That is where it helps me against the fatigue of a whole night on those 
bands.


73
Arie PA3A
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Re: [Elecraft] K3 and whats next from Elecraft

[Arie Kleingeld PA3A]

The next Elecraft rig will be a real SDR radio (not a hybrid like the K3).
With all the convenience and flexibility of the K3, maybe even better.

Crucial will be the design specs.
I hope that the designspecs will be OK and that the engineers will 
listen not only to the hard core contesters, but also to others.
It will certainly have to be a step up from the K3. Yes, even the K3 has 
still a few vital things that have to to be improved.


73
Arie PA3A
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Re: [Elecraft] K3 and whats next from Elecraft

[Arie Kleingeld PA3A]

Hi Milverton,

The K3 has enough software and also in the filtering, but it depends 
HEAVILY on the analog IF filtering.

It is a combination, that's why I call it a hybrid.

And for the rest: The next generation radio's will be full DSP, this 
technology will come fast. We have already seen several rigs (receivers 
and transceivers, also some websdr's on the net) with this technology.



73,
Arie PA3A


Op 19-8-2013 14:03, tnny...@yahoo.com schreef:
 The next Elecraft rig will be a real SDR radio (not a hybrid like 
the K3). 



The K3 is a SDR Radio!

73 Milverton.




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Re: [Elecraft] K3 and whats next from Elecraft

[Arie Kleingeld PA3A]

Lynn,

We don't have to worry about processorpower. The hardware is already 
there and still developping. And Yes, sampling up to 6m is possible.
Apart from that, the interfacing from the machine to us humans can 
certainly do better with some innovation (new ideas) as well.


73,
Arie PA3A



Op 19-8-2013 18:07, Lynn W. Taylor, WB6UUT schreef:


Consider for a moment an SDR with no analog filtering at all.

How wide would the passband be?  Are we going to cover everything from 
MF to 6m?


The A-D converter is going to have to convert everything coming in, 
and the DSP is going to have to sort out what you want out of 
everything coming in: broadcast, other services, noise 50 MHz wide, 
and who knows what else.


I'd rather have the DSP concentrate on a smaller bandwidth signal, and 
have the processing power available for the few MHz I care about at 
any given time.


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Re: [Elecraft] K3 and whats next from Elecraft

[Arie Kleingeld PA3A]

Lynn,

Some filtering ahead or some attenuation or preamp will be there or 
better said: are there. What I meant is that the transceiver of the near 
future will use an HF A/D converter, so direct digital sampling.
One of the first widely available RX's (at a nice price) was the perseus 
RX. Lots of info on the net about this little RX.


A nice application of this principle is found as a 'web-sdr'. See here 
http://websdr.ewi.utwente.nl:8901/

You can even check your own signal with it (if propagation permits hi)

73
Arie PA3A

Op 19-8-2013 21:12, Lynn W. Taylor, WB6UUT schreef:



I'm not familiar with the other Software Defined Radios out there, but 
I'll bet that nearly all of them do some kind of analog pre-filtering, 
then do the heavy lifting in software.


-- Lynn


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