I pass my ladder line through the shack wall with two large cone insulators that use 1/4" brass rods about 12" total length passing through the wall.
At one point I saw erratic SWR readings on the tuner's SWR meter. Several days of chasing the problem determined that one or both of the rods was arcing to the tinfoil backing on the insulation inside the wall. Enlarging the through-the-wall holes and inserting small-diameter CPVC pipe over the rods fixed the problem. The pipes extend a bit beyond the wall on both sides and into the inside of the ceramic cones. Rose has a scar on her arm from when she was painting an outside wall years ago while I was on the air with a KW. (:-(( 73! Ken Kopp - K0PP -------------------------------------------------------------------------------------------- ---------- Forwarded message ---------- From: N5GE <[email protected]> Date: Thu, Nov 15, 2012 at 8:00 PM Subject: Re: [Elecraft] More KAT500 To: "hawley, charles j jr" <[email protected]> Cc: "[email protected]" <[email protected]> I hope you have the ladder-line supported by fire-proof (ceramic) insulators in the attic. Letting ladder-line touch anything combustible can start a fire. Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
