On 11/10/2010 10:20 AM, Don Ehrlich wrote: > I tried a quick and dirty fix which consisted of wiring a pair > of two microfarad/400 volt mylar film capacitors directly to an AC plug (one > capacitor from each line to the ground pin) and then plugging it into the > same outlet as the treadmill.
This is unsafe and illegal, because it creates large leakage currents on the green wire. The maximum permitted leakage current on green is 5 mA. One proper way to filter the AC line is with a filter that includes series inductance (usually a common mode choke) and much smaller shunt capacitors. Common mode current on the AC line can also be suppressed using multi-turn ferrite chokes wound on the mains power cable. See http://audiosystemsgroup.com/RFI-Ham.pdf 73, Jim K9YC ______________________________________________________________ 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
