[Elecraft] K3: cw xmiting 2 signals 600hz apart: HELP

[Vic K2VCO]

Geoffrey Mackenzie-Kennedy wrote:
> Hi Doug,
> 
> This certainly happens with the K2.
> 
> The cause in the K2 case is that the CW sidetone oscillator signal gets into 
> the VCO's varicap circuit and frequency modulates the VCO. The sidebands 
> that I can see coming from my K2 in CW mode are symmetrical above and below 
> carrier, one pair about 90db below carrier and the others much lower in 
> amplitude. Their level varies with band.

I had a bad case of this with my K2 and fixed it by replacing the quad DAC IC.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco