[TowerTalk] Monitor Wavies was:How to mount choke balun?

[Ronald C. Barnes]

That's a pretty common problem, regardless of what shields who, when and 
why...  power transformers in amps kick up alot of magnetism.  Just think 
of the Astron power supplies, when you turn them on the 12V transformer 
sucks the top of the case down (KERTHUNK!!).  Some astrons will actually 
jump around as the top buckles, springs back, buckles, and so on.

My CABLE MODEM, with no supply inside, tugs the convergence off on the side 
of the monitor it sits on.  At least your magnetic interference isn't so 
bad as to pull your convergence off and give you all sorts of pretty rainbows.

The only way to cure this is to move the monitor out of the way, or the 
amp...  You may try a piece of sheet steel, that might cut it down some, 
but spacing is always good.

Ron :)


At 02:44 AM 11/18/01 +0000, Tom Osborne wrote:



>Tom Rauch wrote:
>
> > Aluminum is a very effective shield if it is thicker than a few >skin 
> depths.
>
>Hi Tom, et al.
>
>I have my computer monitor setting just above my amplifier, and
>when I turn the amp on, I can see the 60 cycle vibrations on the
>screen.  Somehow the power transformer is interfering with the
>monitor so guess the magnetic field must be getting through the
>case somehow.  73
>Tom W7WHY
>
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supporting towers up to 100 feet for under $1500!!  http://www.anwireless.com

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