Just when one thinks all is good in the world... I re-worked a Hustler 5BTV so that it covers 40-30-20-15-10 meters, rather than 80-40-20-15-10. The mod was simple - cutting off five inches from the top tube. No problem. It now has a 1.1:1 SWR across most of the bottom of 40 meters. Sweet. Kinda.
When I crank my KPA500 up to full output on 40 meters, I get RFI on my home security system. Lights up all the remote panel lights and beeps. Luckily it does NOT set off the alarm. If I back off output to 350 watts or so, no RFI problem. Both ends of my RG-8 coax have ferrite chokes. This problem ONLY happens on 40 meters; full power on any of the other bands causes no issues. The vertical is mounted on the ground, 25 feet away from the house, with about 40 fairly short radials. The security system controller (an Ademco 4150, 21 years old) is in a metal case, and is located in a closet on the second floor of the house. Anyone else have RFI problems with their security system? If so, how were you able to cure it? I was thinking that perhaps ferrite beads on every lead coming into the controller box may do it? Tnx, Jim / W6JHB Folsom CA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
