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Re: Positonal Hum

Optimus Engineering wrote:
> a.burnham at genie.com wrote:
> >
> > Our MKIII/C is exibiting a problem that has been preplexing
> >  Rank called this
> > "positional hum".
> >
> > Check the AC power cords and verify they are not close to the yoke
 area.. Check to make sure the tube cradle (if it has one) is 
grounded. If this is a "new" problem, it may be power supply, but if 
not "new" it may have been there all along.
> You won't get rid of it all, but you can reduce it greatly with
> MU-METAL.  Jan