[Elecraft] Tx distortion

[mustang65]

  Many thanks for the answer and good to know that I can rule out the filter
as the problem.

  I have not change anything in my setup that I used for severel years and
that is main reasen
  I believe something has happend to the k2.

  All the tests I done so far has bean made in to a dummyload and a icom 735
as receiver.

  I use a shure sm58 microphone that is connected to symetrix 528e micpreamp
, voiceprocessor that
  drives the k2. I also have a Icom microphone that I connect directly to
the K2 and it do not make
  any difference on the distorsion. Both this setups have worked nice for
many years.

  If I use the icom 735 as transmitter and k2 as receiver it still works
fine both with the icom  microphone or the symetrix unit and shure
microphone.
  
  The strange thing is when the k2 has been turned of for a couple of hours
and then
  start to transmit the tx audio is mutch better then it comes like you
slowly turn upp a pot
  the audio gets thinner and the distortion increases.

 I monitor the driving signal from the symetrix unit at the same time to
rule out that as a cause. 
 Looked for cold soldering on the ssb bord.

 I have also looked for any components to get varm and so far it is just Q6
on the RF board that gets
 araond 122 degrees Fahrenheit that do not seems like a problem.


 I have meassured D1 and D14 and looks ok. Can Q2 on the ksb2 board cause
this problem?

 73 Mike sm3xgm

 

  






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