[Elecraft] XV50 no output

[Dave Sergeant]

My XV50, which worked fine for this summer's sporadic E season, has 
suddenly gone faulty and has no output in either CW or SSB. The input 
from the K2 is present, although of course 5mW is pretty hard to 
measure accurately with my scope. There is also no signal at the input 
of the power amplifier module, but if I connect my scope probe to C48, 
at the output of the bandpass filter, and key the rig I have more or 
less correct output and a good 50MHz sinewave on the scope - as soon as 
I remove the probe the output disappears again. So the output module is 
fine and the fault would seem to be related to the U6 buffer or the 
bandpass filter. I am a bit mystified and need to sit down and work out 
what is really happening.

Is there anywhere I should be looking?

73 Dave G3YMC

http://davesergeant.com