[Elecraft] K3 noisy transverter board

[drewko]

My K3 has intermittent noise in the receiver which I've localized to
the transverter board. The noise is an even  static, like background
atmospheric noise, about S3 on the s-meter with occasional stronger
bursts. This is with no antennas connected to the rig and nothing
plugged into the transverter board.

Is this a known problem? It would probably not normally be noticed
without disconnecting the antennas and waiting for it to occur.

It seems to be an electrical contact problem as I can induce it or
quiet it by loosening the board's panel screws and pushing on the
jacks in one direction or another. 

I've tried to wipe the contacts by reinserting the board into the
socket several times. Same with the TMP cable. But the noise has
returned.

I'm wondering if the electrical connection between the board's brass
standoff bushing and the aluminum chassis is significant...

73,
Drew
AF2Z