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Re: [Amps] SB220 "A" mods

To: <>, "Lee Buller" <>, "Amps Amps" <>
Subject: Re: [Amps] SB220 "A" mods
From: "jeremy-ca" <>
Date: Fri, 28 Mar 2008 11:00:11 -0400
List-post: <">>
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.


----- Original Message ----- 
From: <>
To: "Lee Buller" <>; "Amps Amps" <>
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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