[Elecraft] K2 Poor sensitivity

[Radiobeamer]

Hi All,

Firstly, thanks for all of your help.  I checked the RFCs on the SSB board
as per Steve's suggestion and they were OK, although my problem was quite
similar (see below).  Also, thanks to Frank for your suggestion.  As I'm in
the UK it is quite cost prohibitive to send the radio to Don.  Also, being
able to fault-find, align and repair the K2 is part of its attraction.

Secondly, I managed to find the fault!.  I noticed that the sensitivity on
the transverter input was better than on the antenna input.  Probing about
on the TR switch led me to the conclusion that RFC3 was not connected
properly, leading to excessive loss in D4.  Problems with poor soldering on
enamelled wire are well known!  After re-making the joints of RFC3 I can
hear signals down to -130dBm on all bands (with the preamp on).

I've still not measured the sensitivity accurately but it does seem to work
properly now.  I'll re-align everything now for 100% performance.

Thanks again for a helpful and friendly group.

73,

Paul
G4KZY



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