[Elecraft] K2/100 RS-232 Noise

[Vic K2VCO]

David Fleming wrote:

> I've just completed the initial testing and alignment on the KPA100.
> Everything checks out fine. All resistance and voltage measurements are
> within spec and I'm getting 100+ watts out on all bands. However I'm
> getting some annoying noise from the RS-232. My software polls the K2
> every 250ms (4 times per second) and it generates noise on all bands
> every time it's polled. It's coming through load and clear. It wasn't
> there with the KIO2, so I suspect I may have a problem somewhere in the
> KPA100 RS-232 circuitry. Is this a known problem, or do I have something
> wrong? I can't find anything searching the archives.

The dress of the flat ribbon cable that goes to the KPA100 can have an 
effect on noise pickup.  Try bunching it up close to the plug on the 
control board and see if this helps.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco