[Elecraft] Re: magnetic fields and phase noise?

[Earl W Cunningham]

Maggie, K3XS wrote:

"If I were having that problem, I'd be thinking about shielding the
*source*...because it would likely affect other equipment in my shack."
==========
Yes, indeed, the source is the HV xfmr in the amp.  No other equipment in
the shack is affected by it, including any other transmitter or
transceiver I have used to drive this amp.  I'm sure the same is true for
the thousands of amateur amps in service throughout the world.

The PLL circuit in the K2 is sensitive to magnetic fields (this is no
secret) and, rather than shielding the big amp, it makes more sense to
shield the small K2 or its PLL components.  It is felt that the inductor
in the K2's PLL circuit is picking up the hum.  Perhaps Wayne/Eric can
try using a different inductor (wound differently, shielded, whatever) to
cure the problem.

73, de Earl, K6SE