On Sun, 1 Feb 2004 19:48:55 +0000, Richard Markham
wrote:

I have a Pink Triangle record deck with a Rega RB300 arm and Rega
cartridge.

I noticed in the past that there was mains pickup when the arm gets too
near the motor - i.e. nearer to the centre of the record.

Now I have mounted the deck above my CD player, it's picking up hum from
there also.

Can I fix this with some earthing arrangement, or does the deck just
have to be away from any other mains device?

The Amp has an earth stud, but the deck doesn't have one. The deck uses
an outboard PSU for the motor drive.

Yup. Pickups have a tendency to ....er....pick up things. Like
electro-magnetic radiation.

You hope that a well-designed turntable will not suffer noticeable
pick-up from its own motor (though, with volume up, you'll always hear
SOME pickup). But, if it's on top of another unit and picks up
audible hum, there's a rather obvious solution.

There's a lot of rubbish spoken about how to mount hi-fi components.
If you advertised a concoction of goat's dung and rancid butter, and
you charged a high enough price, half-a-dozen nutters will swear on
the Bible: "Even my wife heard the difference!" :-)
But a turntable does deserve a firm support, out of the way of being
directly blasted by the speakers, and of other gear's mains
transformers.