[Elecraft] K2 weird problem

[Luc Favre]

Long time ago (K2 SN 1028), building my ssb-brd, I had a similar trouble.
After finishing the board, I had a diode left the manual did'nt mention.
Finaly I found out, the board was revision B, but the manual revision A, or
vice-versa. . I solder the left diode according to the PCB . And every think
was OK.
You maybe have a trap this kind.
73
Luc/F6HJO/HB9ABB

----- Original Message ----- 
From: "Gregg mulder" <wb8lzg at sbcglobal.net>
To: <Elecraft at mailman.qth.net>
Sent: Friday, December 01, 2006 12:40 AM
Subject: [Elecraft] K2 weird problem


> First I'd like to thank all of u guys fer pitching in to help me with this
problem. That said, hereis an update. Power out set to 5w, CW mode. K2 works
fine with no SSB brd intstalled. When SSB brd in,  on CW xmit, the bar graph
reads no power, the power out at the ant reads abt 10 w, high current alarm
comes on when xmitting.Problem is no longer intermittent, there all the
time. Have replaced (new parts) Q1, Q2 , Q3 , D1, D2 ,D3, D5, es C36 on ssb
brd. Appears to be somthing related to Q1, With Q1 remmoved, rig seems to
xmit OK, Tryed removing D2, but that does not help. Haven't had my mic today
so can't try Peter's suggestion  of measuring voltages while in ssb
mode.Should I  be looking on another brd for somthing feeding the ALC
circuitry ? i'm going to replace C19, C38, R4,es R9 on ssb brd tonight.
73  Gregg
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