[sci.electronics] Odd Gound-Loop problem... maybe

bmaraldo@watdcsu.waterloo.edu (Commander Brett Maraldo) (02/12/88)

  Here's an odd little ditty.  I have a 'constant voltage transformer' that
  I use as a line filter on my audio equipment.  I only use it when I am
  doing serious listening as it draws 8amps load/no-load.  When I have the
  audio amps plugged into the regular house circuit, the heat sinks get
  warm to the touch when the system is idling.  The heat generated is not
  large, and is to be expected.  The system also emits a quiet hum in the
  left channel.  I hard wired another amp into the pre-amp section of my
  integrated amp and I am assuming the hum is caused by a ground loop
  problem somewhere.  Here is the interesting bits:  Sometime the hum
  doesn't exist, but it is there most of the time.  Also, when I connect 
  the system to the constant voltage xformer, and let the amps idle for a 
  while, the heat sinks stay cool.  What is going on here?

					Brett L Maraldo

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               --------     Unit 36 Research     ---------
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  	 	    bmaraldo@watdcsu.waterloo.edu 
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jeffw@midas.TEK.COM (Jeff Winslow) (02/23/88)

Sounds to me like you didn't quite clean up all that mercury...

					:-)
					Jeff Winslow