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Re: Conductive paint



Roy,

We got some RFI Conductive Coating some years ago, and while I have one can
in front of me, it's probably no good any more. It is made by
Miller-Stephenson Chemical Company, Inc., Danbury, CT. We were thinking
about using it to shield the inside of a wood box to keep RFI inside, but it
did not do what we needed to do, and was not cheap. It is available as a 16
oz. can, and we had to buy at least 6 cans to meet their minimum.

I would think that the wires to the speaker are the problem, acting as an
antenna. If the amplifier is inside the speaker cabinet, then you might have
some luck. It might be cheaper to go buy a different set of amplified
speakers!

Gene Harlan - WB9MMM
ATVQ & OSR
ATVQ@hampubs.com

----- Original Message -----
From: Roy Welch <rdwelch@swbell.net>
To: <amsat-bb@AMSAT.Org>
Sent: Sunday, February 13, 2000 11:57 PM
Subject: [amsat-bb] Conductive paint


> Hi Fellows,
>
> Does anyone know of a source for electrically conductive paint?  For
> sometime I have had the annoying problem of RF getting into my PC
> speakers.  Every time the radios key up there is a healthy thump from the
> speakers depending on the antenna orientation.  I have completely filtered
> all inputs to the small speaker amplifier in one of the speaker cabinets
> with no appearent improvement.  Since then I temporarily used some foil
> inside the speaker cabinet and this had considerable success in getting
rid
> of the RF.  So the RF is being directly radiated into the amplifier,
> bypassing the filtering on the inputs.  I want to get some conductive
paint
> and paint the insides of the speaker cabinet to provide the shielding.  I
> have looked into adhesive copper foil, but the inside of the cabinet is
> difficult to get into with the foil.
>
> Thanks.
>
> --
> 73, Roy
>
> Internet: w0sl@amsat.org
> Home Page: http://home.swbell.net/rdwelch
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