I had that problem years ago with any amp. The cure was to wind the speaker
leads in a fat 75 mix toroid such as the FT240-75 from Amidon and others.
I also did it upstairs to the remote TV and stereo speakers in several rooms
to keep the family quiet.
Carl
KM1H
----- Original Message -----
From: <chasm@texas.net>
To: "Lee Buller" <k0wa@swbell.net>; "Amps Amps" <amps@contesting.com>
Sent: Friday, March 28, 2008 10:51 AM
Subject: Re: [Amps] SB220 "A" mods
> Lee Buller wrote:
>> I've always felt the 220 could use better shielding or something. Mine
>> was always a TVI generator for some reason. I don't know if it was
>> something I was doing wrong....bad TVs in the area....but it would
>> generate a lot of TVI. My Ameritron doesn't seem to do that.
>> Lee - K0WA
>
>
> my PC and speakers, etc are about 3 feet away on a separate circuit
> from the SB220 and I often have to unplug the speakers because I can
> hear myself thru them in spite of my Heil headset.
>
> I have considered getting a GI steel trashcan and lid and suspending
> the amp inside it - I guess that if I had an ALS500 like remote head
> for it, I would have already tried it.
>
> any less radical suggestions? I assume we do want a grounded faraday
> cage surrounding the amp, don't we??? <G>
> 73 de chas
> k5dam
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>
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