[Premium-Rx] Watkins Johnson 8888

[GandalfG8 at aol.com]

Hi All
 
I've just bought what looks to be a fairly early WJ8888, serial number 109,  
and it seems to have a switching fault around the demod selection area.
 
I've got the manual but thought I would ask first just in case someone can  
point an immediate finger.
 
It receives fine on AM and FM but has a problem on CW and sideband.
It seemed at first it was just the audio switching as it went silent  
switching to USB or LSB.
However it's not quite that simple and, testing it on a reasonable strength  
AM signal, full symptoms are....
 
AM...........Receiving OK, good RF signal level shown on meter.
FM...........Obviously not sounding right but RF signal level as  before
ISB...........Loses audio, or at least extremely low level, but RF signal  
level as before.
CW, LSB, USB....Loses audio, or at least extremely low level, indicated RF  
signal level drops to zero.
 
If it wasn't for the indicated loss of RF, I'm assuming that's just  
indicated and not real, I would have just looked at the audio switching out of  the 
demodulators.
 
Any ideas anyone??
 
regards
 
Nigel
G8PZR
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