[Elecraft] magnetic fields and phase noise?

[S55M]

Hello!

Maybe changing the alluminium cover plates with some other material would
solve some of the problems at expense of K2 "lighthness".
The only problem are the front plate and the rear plate(basic K2 without
100W PA) which are not so easy to perforate.

And i perfectly agree with Geoff!
When there is a debate abot ESD soldering stations keyers ecc everyione add
2c but on tehnical problems "no takers" HI.

Adi
----- Original Message ----- 
From: "Fraser Robertson" <g4bjm at hotmail.com>
To: <k6se at juno.com>; <dbarker at visioncomm.net>; <elecraft at mailman.qth.net>
Sent: Saturday, March 19, 2005 11:26 AM
Subject: [Elecraft] magnetic fields and phase noise?


> Interesting Earl, the non exhaustive tests I've done indicate that it is
not
> due to magnetic fields.  But if indeed that is the case, there must be a
> relatively easy, if perhaps not elegant, way of significantly improving
> this.
>
> Has anyone else investigated this?
>
> 73 Fraser G4BJM
>
> >From: Earl W Cunningham <k6se at juno.com>
>
> >Over a year ago I noticed this problem, which occurs only when my K2 is
> >driving my Alpha linear.  After extensive testing done by me to determine
> >the cause of the problem, is was found to be caused by hum from the
> >magnetic field of the linear amplifier's HV transformer getting into the
> >PLL circuit of the K2.  In my case, 6 feet of separation between the K2
> >and the linear was not enough to eliminate the problem, however with 30
> >feet of separation (with the K2 and amp in separate rooms) did solve the
> >problem.  This answer is unacceptable, of course.
> >
>
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