"David" wrote in message
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"David Farber"
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"David Farber"
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It could also be due to, or
exacerbated by, a dried out
electrolytic
filter capacitor in the DC supply
circuitry.
It occurred to me that if I posted
the pictures of these relays, that
it
would be easy for somebody that is
more familiar with this type of
equipment
would be able to tell me if these
relays have AC or DC type coils:
http://www.pbase.com/mrfixit/image/81163240
http://www.pbase.com/mrfixit/image/81163242
http://www.pbase.com/mrfixit/image/81163244
Thanks for your reply.
--
David Farber
David Farber's Service Center
L.A., CA
These relays are all designed to be
energized by an AC source. The copper
shunt at the end of the pole piece is
characteristic of AC relays. Is
there
a 24 volt transformer anywhere in
there and do all of the relays
chatter,
or
just one?
David
Yes, there is a 24V transformer. The
difficult part is figuring out which
one(s) are chattering. They are not in
a very convenient place to observe
what's going on and all three of them
are mounted side by side. I might need
to extend the wires a bit so they can
be moved into plain view and still
have them electrically connected. Can
you please explain in the picture of
relay 1,
http://www.pbase.com/mrfixit/image/81163240,
what the rating of,
"120VAC/28VDC"means? Is that the
rating of the contacts?
Thanks for your reply.
--
David Farber
David Farber's Service Center
L.A., CA
The picture would indicate to me that
the contacts are rated for 11 amps with
either a 120v AC source a 28v DC source.
It is not obvious what the coil voltage
is supposed to be. Relay 2 appears to
have a 110vac coil and relay 3 a 24vac
coil.
These look remarkably clean for such an
old unit.
David
The pictures are about two years old. The unit itself is located in a
protected box and that probably has helped to preserve the looks of the
components.
Thanks for your reply.
--
David Farber
David Farber's Service Center
L.A., CA