On Fri, 22 Jun 2007 17:47:11 GMT, "James Sweet"
wrote:


wrote in message
roups.com...
On Jun 21, 2:53 pm, "David Farber"
wrote:

Sorry about this incomplete message. It was erroneously sent. I
think the
solution will be to replace the noisy relays with new ones.

That, it would. Stanley makes (made) good stuff, and 28 years ain't
nohow half-bad. If all it is is relays, count yourself lucky.

Peter Wieck
Wyncote, PA


Might be worth checking to see if there's a diode or rectifier bridge
in
there. A shorted diode could cause AC to be fed to relay coils
expecting DC
which will make them chatter or buzz.


It could also be due to, or exacerbated by, a dried out electrolytic
filter capacitor in the DC supply circuitry.