> -----Original Message-----
> From: Jon Ogden
> 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'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?
>
How about replacing the plastic box with a metallic one? I've also
heard about a metallic spray for shielding, but don't know anyone who has
actually tried this successfully.
Does it happen also on 15 & 40? I don't remember what mix ferrite
were you using. 73 or 77 or 75? Maybe a combo of two of these might do the
trick.
The ARRL handbook shows a table for Series resonant bypass caps for
various ham bands:
7 MHz -- 0.15 microF
14 MHz -- 0.039 microF
28 MHz -- 0.01 microF
Hope this helps.
73,
de ed -K0iL
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