[Elecraft] magnetic fields and phase noise?

[Vic Rosenthal]

Earl W Cunningham wrote:

> Worked Vic, K2VCO this morning on 40m CW.  His K2/100 was absolutely
> clean with no clicks and no noise on his CW sidebands while he was
> running barefoot.
> 
> When he ran ran QRO to his Alpha 87A, There were still no clicks, however
> there was noise on his sidebands extending out +/- about 1 kHz from
> center frequency.  I honestly expected it to be worse than that, but he
> apparently also has the same problem with the magnetic field from the
> magnetic field from the HV xfmr in his amp getting into his K2.

My K2 is about 4 feet from the Alpha 86 (not 87A unfortunately) and it's on the 
side near the hypersil transformer.  If this is indeed caused by the magnetic 
field, I suspect that there is a particular component or components that are 
affected, and perhaps it would be possible to shield them.  I rarely run more 
than 100 watts, but there are times that I would like to do so, so I'll be 
looking for a solution.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco