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Author Topic: Insulator for thru the wall antenna connection  (Read 818 times)
KF7ZFC
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Posts: 26




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« on: November 06, 2012, 02:34:26 PM »

I have a 4" TO 5" thick wall that I want to feed my wire antenna thru. I have already installed a 4 hole plate with 2 coax feed thru's and a ground connection.

I have the 10-24 threaded rod and ceramic insulators for both sides. I don't know what to insulate the threaded rod with that goes thru the wall. Will polypropylene tubing or vinyl tubing work? These are available at HomeDepot etc.  Teflon tubing is very expensive.

Any thoughts? Thanks

Steve
KC7ZFC (was KC2ICL)
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KD0REQ
Member

Posts: 931




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« Reply #1 on: November 06, 2012, 03:53:38 PM »

theoretically, the conductive rod should be fine if air-insulated.

unless you have a nasty wall that is always full of moisture.  then just about any heatshrink should work.  if you're running high power or have a large voltage mismatch going into your tuner, then several layers should be used.  based on the breakdown of what heatshrink you have handy, insulate for 6kv or 7 kv if you are running the limit.

you are insulated excellently from surface by the ceramic insulators.  there will be 1/2 to 3/4 inch airgap to any surface if you drilled your holes straight, and that's easily several kv unless you have the walls festering inside with moisture and rot.
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KF7ZFC
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Posts: 26




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« Reply #2 on: November 06, 2012, 05:44:05 PM »

Thanks
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