[Collins] Need relay for 32V2

[Dr. Gerald N. Johnson]

On Sun, 2009-09-13 at 16:39 -0400, Meir WF2U wrote:
> Folks,
> 
> The T/R relay of my 32V2 finally gave up the ghost. Last weekend the HV
> didn't come up when attempting to transmit. Today when I pulled the
> transmitter out of its cabinet to troubleshoot, during the initial visual
> inspection I noticed that part of one of the contacts on the relay - the
> SPST section which turns on the HV - is broken in half. I found the broken
> flat contact piece with the contact point on the bottom of the cabinet. 
> So, the 32V2 is dead in the water until I find a replacement. I'm trying to
> avoid a modification which would entail cobbling up a similar contact
> arrangement from one or two off the shelf relays which will need a different
> voltage for the coil, or try to find a n original replacement.
> Does anyone have a junked 32V chassis with a relay, or a pull from a junked
> unit, or maybe a NOS spare...
> Any leads are welcome.
> 
> TIA,
> 
> 73, Meir WF2U
> Landrum, SC
> 
Lots of contacts there. Two sets in series for switching the HV primary.
Might be a cobble to use just one set of those, though the pair may arc
a bit more when opening than two. This style of relay doesn't make big
gaps at the open contacts. One of its failings, but it can be fairly
quiet. Its called a short form telephone type relay.

The relay is run by a resistive divider from the +240 volt supply, so it
wouldn't be hard to modify the divider to use a 24 volt or 110 volt DC
relay coil if you can find something with enough contacts and adequate
contact voltage capabilities. If it was me, I'd go to an armature type
relay that has bigger contact gaps, maybe something in the old P&B KHP
family with 110 volt DC coil rating. It wouldn't be original but it
would run for a long time.

-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer