[Elecraft] No Longer Deaf K3!!!

[John Unger]

Thanks to Rick, N1RM, and his expertise in tracing circuits, my K3 is back
in FB working order. We found that a switching diode on the bottom
(fortunately) of the RF board had failed. (I think it was D25.). It was a
low cost fix, and with Rick's surface mount skills a replacement was soon
installed.

Rick's main expertise in working with ham equipment is repairing ACOM amps,
but fortunately he had the ability and equipment to help solve my K3's
problem.

Thanks for all the ideas and feedback here on this reflector.

73 - John, W4AU
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Re: [Elecraft] Update: K3 Hard of Hearing

[John Unger]

Transmit works fine, Martin.

On Tue, Jan 21, 2020 at 7:46 PM Martin Sole  wrote:

> Is the transmit working okay?
>
> Don’t recall if you mentioned before.
>
> My early K3 suffered 0.1uf capacitor failure causing loss of injection
> which affected both tx and rx. Another cap failure caused loss of tx only
> due to shorted switching voltage. Both were on the RefOsc board.
>
>
>
> Sent from my iPhone
>
> > On 22 Jan 2020, at 02:42, John Unger  wrote:
> >
> > Wow, guys, thank you all for the suggestions of things to check, but
> still
> > no joy...
> >
> > Here's your suggestions that I have checked:
> > voltage - 13.6
> > RX ANT not on
> > I uploaded a couple of old config files - not change
> > Turning RF GAIN fully CCW puts SWR meter at full scale
> > My other K3 hears FB on all the antennas
> > This K3 doesn't have an ATU
> > Switching an antenna in and out makes no apparent difference in received
> > signals
> > No change in BP filters; they have been working fine for long time.
> >
> > I do operate SO2R. The last time radio was working OK was during the NAQP
> > CW contest where I was running 100W. I have operated KW amps in the past
> on
> > each radio without any front end problems (but there's always the first
> > time, right?).
> >
> > Thanks again for the help
> >
> > 73 - John, W4AU
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>
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[Elecraft] Update: K3 Hard of Hearing

[John Unger]

Wow, guys, thank you all for the suggestions of things to check, but still
no joy...

Here's your suggestions that I have checked:
voltage - 13.6
RX ANT not on
I uploaded a couple of old config files - not change
Turning RF GAIN fully CCW puts SWR meter at full scale
My other K3 hears FB on all the antennas
This K3 doesn't have an ATU
Switching an antenna in and out makes no apparent difference in received
signals
No change in BP filters; they have been working fine for long time.

I do operate SO2R. The last time radio was working OK was during the NAQP
CW contest where I was running 100W. I have operated KW amps in the past on
each radio without any front end problems (but there's always the first
time, right?).

Thanks again for the help

73 - John, W4AU
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[Elecraft] Hard of hearing, almost deaf K3

[John Unger]

 A few days ago one of my K3's appeared to have suddenly gone almost deaf.
Here are some of the symptoms and observations:

- Rig's S meter shows very low or no background noise (strong stations can
still be heard weakly).
- P3 shows http://mailman.qth.net/mailman/listinfo/elecraft
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[Elecraft] Testing, please ignore

[John Unger]

Test.
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[Elecraft] For Sale: Extreme Isolation EX-29 headphones

[John Unger]

Sorry if this is a duplicate of a post that I tried to make a few days ago 
through nabble. It wasn't clear that I was able to post the message 
successfully that way.

I learned about these headphones from earlier enthusiastic posts on the 
Elecraft reflector. The isolation and fidelity they deliver is 
extraordinary. They have lived up to all my expectations but now are excess 
to my needs because of the present of a Heil Pro-Set Plus headset from my 
son! You can check out details of the headphones at:
http://www.quietheadphones.com/product/ex-29/

The headphones have had very little use and are in like-new condition. I 
will sell them for $75.00 including USPS Priority mail shipping.

tnx es 73 - John, W4AU

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[Elecraft] ICE 419 interface

[John Unger]

I am in the process of connecting my K3 to a Model 419 ICE bandpass filter. 
Does anyone have a circuit or schematic of how they interfaced this filter 
with the outputs on the ACC port on the K3, or do I need a full-blown 
solution like the KRC2 band decoder?


tnx es 73 - John, W4AU

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[Elecraft] K3 #843 in CW SS

[John Unger]

I operated in the CW SS this past weekend as an unassisted, SO2R station. I 
had my K3 as the main  radio and was using it for running most of the time; 
I used my TenTec Orion as the S&P second radio. It gave me an excellent 
opportunity to compare the two rigs under fire.


The biggest thing I noticed was how much easier it was to listen to K3 
compared to the Orion. When you are listening to one radio in each ear, you 
notice things like this... One feature of the Orion that did come in handy 
was using the "Sweep" display to make a quick check for activity on a 
"dead" band while still running on the K3.


However, if I had to get rid of one radio, the Orion would be the one to 
go... The K3 is a wonderful contest rig!


73 - John, W4AU


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Re: [Elecraft] K3: cw/vox/PTT ver 2.02 - bug?

[John Unger]

Hi Don -

I believe you are wrong here in stating that the delay of RF output after 
keying is fixed in the K3. Here is an excerpt of the notes from Wayne for 
the MCU 1.87, DSP 1.69 firmware update:


...
  "* VARIABLE AMP KEYING DELAY: Added CONFIG:TX DLY menu entry, which sets 
the time from KEY OUT jack (active low) to first RF in 1-ms steps, from 8 
to 20 ms. To minimize loss of QSK speed, use the shortest delay that 
works with your amp. Most will work with the default (minimum) setting of 8 
ms."

...

73 - John, W4AU


At 09:31 PM 6/8/2008, Don Wilhelm wrote:



... stuff deleted ...

The delay of RF output after keydown is currently fixed in the K3, but 
there is consideration being given to allow it to be user controlled in 
the future.  The adjustment range may be limited, so if you have 
transverters and preamplifiers that must have a longer delay to the onset 
of RF, the TX INH input would be required.


73,
Don W3FPR


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Re: [Elecraft] K3: ERR TXG message with KPA3

[John Unger]

Hi Toby -

Yes, I did turn the KPA3 "on", but thanks for the hint. I should also add 
that all my filters have the correct offsets set (with "-" signs...), and I 
have the 2.7 KHz filter set as the transmit filter for all modes.


I should probable reiterate that the radio calibrates fine on all bands 
with the power level set at 5 Watts.


73 - John, W4AU



At 02:00 AM 5/6/2008, Toby Deinhardt wrote:

Hi John,

did you turn it "on" in the firmware? Easy to enough overlook...

Page 42 - OWNER’S MANUAL
Revision C1, November 18, 2007

Option Module Enables

K3 options can be installed at any time. Once an
option has been installed, use the associated
CONFIG menu entry to enable it (see list below).
Then turn the K3 off and turn it back on. This
allows the K3 to find and test the module.

• KAT3 ATU module: set KAT3 to BYP.

• KBPF3 general-coverage band-pass filter
module: set KBPF3 to NOR (if you’re
installing a KBPF3 on the sub receiver, tap
SUB while in the menu entry).

• KXV3 RF I/O module: set KXV3 to NOR.

• KRX3 sub receiver: set KRX3 to NOR-ANTx
where x is your selected wiring for the sub
receiver’s auxiliary antenna (1 = unused KAT3
ATU antenna, 2 = AUX RF jack, 3 = AUX RF
in parallel with the RX ANT IN jack on the
KXV3). For details on sub receiver antenna
sources, see pg. 22. You may also need to set
up crystal filters for the sub receiver.

• KDVR3 voice recorder: set KDVR3 to NOR.

• KPA3 amplifier module: set the PA MODE
menu entry to PA NOR. See menu entry
listings for information on other settings.
====


vy 73 de toby


John Unger wrote:

Thanks for the reminder to put K3 in the Subject: line
I just installed the KPA module and attempted to do the High Power Gain 
Calibration procedure at 50 Watts. But all that happens is that I get 0 
Watts indicated and a "ERR TXG" message. Any idea what is going on? 
Manual says to refer to a mysterious "Service Manual".

Everything works FB up to 10 Watts.

tnx es 73 - John, W4AU
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[Elecraft] K3: ERR TXG message

[John Unger]

Thanks for the reminder to put K3 in the Subject: line

I just installed the KPA module and attempted to do the High Power Gain 
Calibration procedure at 50 Watts. But all that happens is that I get 0 
Watts indicated and a "ERR TXG" message. Any idea what is going on? Manual 
says to refer to a mysterious "Service Manual".


Everything works FB up to 10 Watts.



tnx es 73 - John, W4AU 


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[Elecraft] ERR TXG message

[John Unger]

I just installed the KPA module and attempted to do the High Power Gain 
Calibration procedure at 50 Watts. But all that happens is that I get 0 
Watts indicated and a "ERR TXG" message. Any idea what is going on? Manual 
says to refer to a mysterious "Service Manual".


Everything works FB up to 10 Watts.



tnx es 73 - John, W4AU 


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Re: [Elecraft] K3 CW Rx Audio

[John Unger]

I'm still waiting for my K3, but...

I guess from the fact that you went through these gyrations means that one 
can't simply set the roofing filtering selection on "auto" and dial in a 
DSP width of 2700 Hz., e.g., or whatever with a K3 and have the 2700 Hz. 
SSB filter as the roofing filter; like I can with my Orion?


What am I missing?


73 - John, W4AU

At 04:56 PM 4/20/2008, you wrote:
I tried something last night that may be of interest to some CW ops. 
Although most of us are always in search of ways to narrow CW bandwidth, 
there are times when listening to CW is made more enjoyable when the 
receiver is allowed to open up a bit, especially with AFX activated.


In order to engage in wideband CW reception with the wider crystal and DSP 
filters, press SPLIT, then A=>B.  Set VFO A for either LSB or USB.  Then, 
set VFO B to CW.  Next, press and hold the SUB button to link VFO A with 
VFO B.  The CW offset can be made to match the sidetone frequency by 
setting VFO A and B to slightly different frequencies (difference being 
the side-tone frequency).  I stored my settings into memory so I don't 
have to go through all the gyrations next time.  With this approach, the 
rig is transmitting CW on VFO B, but listening in either LSB or USB on VFO A.


It's important to set the Rx frequency on VFO A up by the offset amount 
(e.g., 600 Hz) for CW LSB receive, and down by the offset amount for CW 
USB receive.  My tests show that QSK performance remains super-fast and is 
not affected with this procedure.


Paul
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[Elecraft] Microphone compatibility - Another Solution

[John Unger]

What I have done with all my non-rig-specific microphones (2) and Heil 
headset/mics (3) is to install a simple stereo 1/4" jack on them. Then I 
have short pigtail adapters with the rig-correct mic plug on one end and a 
1/4" stereo plug on the other. Makes it easy for going from one rig to 
another with dynamic mics. I am connecting only the audio, PTT, and GND, of 
course.


As usual, YMMV...

73 - John, W4AU

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Re: [Elecraft] K3: Test from Bavaria

[John Unger]

Toby -

All that I have to say is ausgezeichnet! Thanks to you and your friends for 
doing all the hard work for the original report and especially for the 
English translation. I was having a difficult time reading the techniche 
Deutsch...  :-)


73 - John, W4AU


At 05:34 AM 1/30/2008, you wrote:

The Report from the Bavarian Contest Club is now available as a PDF in
English and German. We will be updating the report very soon with
interesting new measurements and comments, and plan to continue to
update it on a more or less regular basis:

   
   

If anyone has hosted my draft English translation, e.g. the K3 Wiki,
please remove the text and replace it with a link to the Bavarian
Contest Club: .

vy 73 de toby



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