Sounds like a job for the MFJ nuller. The good news being its a point source and should be easily handled. It may cost you several months of frustration for no good outcome otherwise but perhaps it's worth a try if there is a simple bonding issue there.
Sent from my iPad > On Dec 14, 2014, at 01:08, Jim Brown <j...@audiosystemsgroup.com> wrote: > >> On Sat,12/13/2014 5:35 PM, Don Kirk wrote: >> Now going back to the contractor that installed the equipment in an attempt >> to better understand the hardware in the unit > > That smells like a Variable Speed Drive, the heart of which is a switching > power supply that generates pulses in the 10 kHz range, the width of which > are varied to control the speed of the motor. Lots to go wrong here -- > switching power supply, square pulses of big current running a distance > between the controller and the motor, often with supply and return conductors > widely separated from each other, and with controller and motor widely > separated, so the current flows in a large loop. Can you say train wreck? > > 73, Jim K9YC > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
