Ian, GM3SEK wrote:
> The most versatile problem-solvers are K9YC's favorite large #31 snap-on
> beads. They are large enough to accept multiple turns (which greatly
> boosts the CM impedance compared with beads) and can be snapped on to an
> existing cable without removing any connectors, so it only takes a few
> seconds to create a highly effective CM choke wherever in the station it
> might be needed.
The Fair-Rite mix 31 Snap-Its are proven to reduce CM currents in
multiple applications. Jim Brown's paper has been the reference for
hams dealing with this issue:
http://audiosystemsgroup.com/RFI-Ham.pdf
<
http://audiosystemsgroup.com/RFI-Ham.pdf>
In my case I had an issue that whenever I transmitted on 160M my home
alarm would sound, which made me unpopular with my wife when working top
band contests at 2AM. Running the bundle of cables returning to the
alarm panel through the large Snap-It 3-turns stopped this cold.
(commercial content here) Pro Audio Engineering is now carrying the four
most commonly used sizes including ones mentioned in his paper at good
pricing.
Cheers & 73,
Howie - WA4PSC
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