[Elecraft] K3 intermittent receive issue

[Bill W2BLC]

Sounds like a mechanical issue to me. That would mean a loose connector, 
loose wire inside of a connector, or a cold solder joint.

To start trouble shooting, you will need:

1. A small non-conductive probe - part of an old pen case will do well 
as will a plastic cable tie. Lightly tap each connector with the probe 
and lightly pull/push on the wires going to the connectors.

2. A can of "Freeze" to selectively spray soldered connections. Fast 
cooling will often cause a failure if said connection is faulty.

Both of the above tests will cause the problem to appear and/or correct. 
Gently is the operative word of the day.

In most instances, these methods will find the offending part(s). Again, 
DO NOT use force when pulling/pushing connectors or wires. What you have 
is slight - else tapping the case would have no effect.

Bill K-Line