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[RFI] Touch Light Update #2

To: <rfi@contesting.com>
Subject: [RFI] Touch Light Update #2
From: Jon Ogden <jono@enteract.com> (Jon Ogden)
Date: Wed, 20 Jun 2001 17:36:27 -0500
OK all, now for my second touch light update.

I previously told you that I had gotten my problems with my under cabinet
touch lighting solved on 10m.  However, I hadn't tested any other bands.

Well, last night I got on 20m and yes, you guessed it - I got into the
lights.  Every time I keyed the rig, I would step the lights through their
settings.

I already had a large torroid on the AC mains end of things with as many
turns (over 15) that I could get on it.  This was as close to the control
box as I could get.

I tried a small torroid on the sensing line - about 25 turns.  In fact, it
added so much inductance that it prevented the sense line from working all
the time.  Still no good.  The radio still got into things.

I then put torroids on nearly every other cable that is in the whole set up.
I am STILL getting into the unit.

I've opened up one of these gems and there isn't much inside.  The case is
entirely plastic and it doesn't look like there is anything so much as a
good ground connection to earth anywhere.  Pete, N4ZR, suggested I put
bypass caps to ground on all the lines.  That is the point I am at.  Short
of that, I don't have any other solution.  I also wonder if somehow
shielding all the circuitry may help.  Right now there is none.  Anyone have
any ideas for adding shielding to a little plastic box?

73,

Jon
NA9D

-------------------------------------
Jon Ogden
NA9D (ex: KE9NA)

Member:  ARRL, AMSAT, DXCC, NRA

http://www.qsl.net/ke9na

"A life lived in fear is a life half lived."


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