[Elecraft] Crazy SSB board problem

[Peter Zenker]

An SSB board shows a crazy problem in different K2:

In CW mode all is ok. 
In LSB or USB the signal goes down every time you hit the display key
(or several of the others) by a couple of dB. Signal gets normal as soon
as you touch PTT.

Before I start to rebuild the complete thing, I hope that I get an idea
with your help where to seek a failure.

Any other SSB board in the same K2 does not show this phenomena,
changing of the Prozessor did not help. 

73 de DL2FI, Peter
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DV Berlin im DARC e.V.
www.dl-qrp-ag.de
www.qrpproject.de