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Re: [TowerTalk] Balun Recommendation

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Subject: Re: [TowerTalk] Balun Recommendation
From: Rick Stealey <>
Date: Sat, 14 Apr 2012 21:19:12 +0000
List-post: <">>
Would a current balun (choke?) be a possible solution to a problem of "RF on 
your audio, OM" in my mobile installation?
I'm planning to try one on the coax line either at the antenna end or the 
transceiver end.
My 20 meter Hamstick antenna is mounted on the rear deck of a sedan with one of 
those triple magnet mounts.
I have the frame of it tied to the car chassis with a copper strap.  If I move 
the antenna to the roof
it clears up the audio, but I don't want to operate with an 8 ft whip on top of 
the car.
I also have a 2.4 inch ferrite #31 toroid on order to install on the 12 volt 
power cable.
But I'm wondering if I need to also treat the microphone cable.  Is there a 
straightforward way to determine
what's causing the problem?

Rick  k2XT

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