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Re: Rank AC Power

Regarding Rank MkIII ac.....

I have gotten substantial results in hum and noise reduction by
installing grounding bus bars and new grounding systems for the color channel
and digiscan.  In addition, an examination of the machine's physical
environment to determine whether or not the positional hum is being generated
externally.  This can happen if the machine is located near an improperly
connected ac building mains system.  If location is not a factor, then
literally wallpapering the tube area, cradle and cover with "mu-metal" is
very very effective.

D. Chapman