Heil K2 Proset with K3

[k6dgw]

Ok Folks,

As often happens on reflectors, I have totally lost the thread on this
subject [and I suspect I'm not alone :-) ] although I still have the
problem.  Please note the details below:

K2 Proset purchased with K3 came with the stock adapter.  WITHOUT the
adapter, and plugged into the rear jacks, VOX ON, VOX GN=50,
ANTIVOX=000, and RPL.bias turned on, it works fine.  VOX works fine.
PTT works fine.  Semi-QSK works fine.  QSK works fine [never really
liked full QSK].

FPL.bias turned on, gray Proset plug inserted in the mating adapter
socket, 8-pin connector inserted into the front panel plug, VOX ON, VOX
GN=50, ANTIVOX=000 -- No SSB, no VOX, no PWR OUT.  All CW functions work
fine.

Numbers of folks, including one of the Chief Elecrafters, advise me that
the FP config in the paragraph just above this one works for them,
leading me to believe that my problem has exactly nothing to do with
pins 5 and/or 6 of the 8-pin mic connector.  This is further borne out
by the word to me that mic bias goes on the audio lead anyway.

I have discovered that if I tap XMIT, it goes into transmit but there's
still no audio, however tapping XMIT again won't clear it and it stays
in transmit.  I believe [word from the K3 designers again] that this has
something to do with a missing ground on the blocking cap on the front
panel, which I have not fixed yet.  If fixing that solves my FP audio
problem, I'll be sure to let everyone know.

Meanwhile, I will use the rear panel connectors which is what I want to
do anyway [I think, haven't actually installed the rig at the opr
position yet].  Boy, is that receiver great!!

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2008 Cal QSO Party  4-5 Oct 08
- www.cqp.org
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[Gary Hembree]

Fred,
The front panel ground patch has fixed all of the problems associated with using biased element microphones that I am aware of.  The original three K3s affected were SN 690, 728 and 729.  Since then several others have complained about the same problems, although I haven't heard if the patch worked for them.  

The symptoms on my K3 were exactly the same as on yours when I used the Elecraft Proset.  Additional problems surfaced when using the Elecraft MH2 hand mike.  All of these abnormalities vanished when I grounded (with one small wire) the two capacitors that have the missing ground trace on the front panel board.  These are bypass capacitors by the way, not blocking.  An official field repair notice is expected soon from Elecraft.

73
Gary, N7IR
K3/100 729
K2/100 2154
K2 1078 and 3463
Central Arizona DX Association
7th Call Area QSO Party (7qp.org).  Tomorrow May 3 1300Z - May 4 0700Z
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[Eric Swartz - WA6HHQ]

I'm posting an alert with details on this by end of day today. (Both on
the web page and to the Elecraft list.) We're just finalizing the docs
right now.

This will include the serial number range and instructions on adding the
ground wire to correct it. We only became aware of this late last week
and finalized the correction and docs this week. All new production had
this corrected.

73, Eric


Gary Hembree wrote:
> Fred,
> The front panel ground patch has fixed all of the problems associated with using biased element microphones that I am aware of.  The original three K3s affected were SN 690, 728 and 729.  Since then several others have complained about the same problems, although I haven't heard if the patch worked for them.  
>
> The symptoms on my K3 were exactly the same as on yours when I used the Elecraft Proset.  Additional problems surfaced when using the Elecraft MH2 hand mike.  All of these abnormalities vanished when I grounded (with one small wire) the two capacitors that have the missing ground trace on the front panel board.  These are bypass capacitors by the way, not blocking.  An official field repair notice is expected soon from Elecraft.
>
> 73
> Gary, N7IR
>
>  
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[dave.wilburn]

http://www.elecraft.com/K3/k3_app_notes.htm

Approximate shipping date - Approximately April 23-24, 2008

Serial numbers 660 through 782. (As early as S/N 654 may demonstrate
this problem, but we think the problem starts with S/N 660.)

I put the front panel on last night.  Should have read email first.
The front panel was a bit annoying to get on, but not as bad as the NB
standoff with the shield already installed.

Oh well, still had to install the KPA3 anyway.


Dave Wilburn
K4DGW
K2/100 - S/N 5982
K3/100 - S/N 766

"For those who fought for it, freedom has a flavor the protected will
never know."


Eric Swartz - WA6HHQ, Elecraft wrote:

> I'm posting an alert with details on this by end of day today. (Both on
> the web page and to the Elecraft list.) We're just finalizing the docs
> right now.
>
> This will include the serial number range and instructions on adding the
> ground wire to correct it. We only became aware of this late last week
> and finalized the correction and docs this week. All new production had
> this corrected.
>
> 73, Eric
>
>
> Gary Hembree wrote:
>> Fred,
>> The front panel ground patch has fixed all of the problems associated
>> with using biased element microphones that I am aware of.  The
>> original three K3s affected were SN 690, 728 and 729.  Since then
>> several others have complained about the same problems, although I
>> haven't heard if the patch worked for them.  
>> The symptoms on my K3 were exactly the same as on yours when I used
>> the Elecraft Proset.  Additional problems surfaced when using the
>> Elecraft MH2 hand mike.  All of these abnormalities vanished when I
>> grounded (with one small wire) the two capacitors that have the
>> missing ground trace on the front panel board.  These are bypass
>> capacitors by the way, not blocking.  An official field repair notice
>> is expected soon from Elecraft.
>>
>> 73
>> Gary, N7IR
>>
>>  
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>

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