Hi Gang,
I got my K2 a couple of years ago.
Once in a great while I would notice the audio volume drop to about 30%.
It would typically happen after I had moved the unit or had the cover
off doing filter alignments.
I found I would simply tap the unit and the audio volume would be
normal.
I
DW,
You have a bad solder connection somewhere, and it is not necessarily in
the audio section - it can be anywhere in the receive chain, including
the noise blanker and the KSB2 option if those are installed.
Use a constant signal source such as a XG1, XG2, XG3 signal generator
set for a 50
DW,
Additional information about Receive Signal Tracing when your problem
occurs. Yes, that can be done using the RX signal tracing steps in the
manual Appendix E. You will need a high level signal generator - the
xtal oscillator shown in the manual will do just fine, or the attenuated
Three very important items in the technicians tool box when searching
for intermittents:
1 - a can of Freeze (a freon product)
2 - a hair dryer
3 - a non-conductive probe
Explanation: The cold causes bad solder joints/PCB traces to open -
causing the circuit to fail. The heat will cause
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