I need some advice from someone with experience in dealing with RF problems. I have an in-home elevator that is putting out RF hash in harmonic locations on the ham bands, especially 80 meters. I've gotten tired of dealing with the noise. I have both a 240V circuit and a 120V circuit feeding the control panel. The 120V circuit powers the cab lights and elevator switches. The 240 feeds the motors the raise and lower the elevator. The cab is 3 ft. by 4 ft. so it isn't a small residential elevator. We had our house designed for it when we built two years ago.
I have two 4 in. inside diameter RF toroid chokes that I bought specifically for the ham bands. I plan on putting these RF chokes on the electrical supply lines for each circuit right before they enter the control panel to see if it helps my RF issue. I have two questions. 1. Is rapping 10 turns of the electrical wires of each circuit around the toroid enough? 2. The electrical wires are individually connected to the control panel. In the case of the 120V, there is a white, black, and ground. In the case of the 240, there is 3 reds, a black and a ground. Do I have to wrap the ground wires of these circuits around the toroid as I do the other electrical wires? It will be interesting to see how much better my K4 will be when I get it, in rejecting RF noise, compared to my KX2, KX3, and K2. Thanks and 73, Terry, N7TB ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
