[UK-CONTEST] K3

[Don Beattie]

Apologies for cross posting this to two reflectors, but I am seeking a bit of advice.

I pressed my K3 into use for the ARRL 160 contest overnight, and this morning, got a report of a bad spurious +/- 18 kHz from the wanted signal. I've checked, and it's there, about 30-40 dB down.

Has anyone experienced this, and is there a known fix ? I suspect imbalance somewhere in the first mixer/DSP. 

Does anyone have any advice (other than to write to Elecraft !) By the way, as far as I can see, it is there on all bands.

73

Don, G3BJ