Topband: Grounds

Mike Waters mikewate at
Sat Mar 1 23:25:30 EST 2014

Thanks. I have actually studied your document Jim, and have recommended it
to many others. :-)

I used what I had here. There are several bifilar turns through some of
those big #43 beads. I even hung some #31 cores on the lamps themselves
(which helped a little) and on the Romex feeding the fixture. That's all I
have had time to do up to this point.

I have some 2.4" #31 cores here I could use. But there's another problem
that I want to fix: exactly how the RFI from that fixture is getting into
my RX system. It's over S9 on my IC-765 on several 160m frequencies. But I
just don't have the time lately.

I didn't mean to hijack this thread. Anyway, time to go play in the contest

73, Mike

On Sat, Mar 1, 2014 at 10:12 PM, Jim Brown <jim at>wrote:

>  Big #43 beads on the ballast leads didn't fix it.
> Of course not. A choke for 160M requires many turns on one or more #31
> cores. Study

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