> Unfortunately, the AL-82 and SB-200 both create a pseudo-neutral > by placing high voltage bypass capacitors from each line to the > chassis/ground.
Right. The problem has been around at least since the early '30s. For the caps used in the AL-82, that works out to about 0.5 mA of current per leg diverted to ground. Possibly enough to cause audio problems, depending on shack grounding configurations. Somewhat surprising, commercial RFI/EMI AC line filters (e.g., Corcom) use modular CM chokes, but also contain multiple HV bypass caps from line to ground. I just checked Corcom's website and typical AC leakage from line to ground for their 10A series filters is ~ 1.5 mA @ 250VAC and these devices are routinely used in lab-grade instrumentation and audio equipment.<g> Paul, W9AC ______________________________________________________________ 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
