Latching relay-garage door opener

[Ed Richards]

Lou;

I have had some experience with sticking relays. One thing that happens
is one contact will develop a pit and the other a tit that sticks in the
pit. These were DC relays. I don't know if AC contacts would do this.
Another problem was a fiber insulator that moves the contacts that
developed hair-like feathers under a microscope that caught on the frame.
Another was the relay assuming some self magnetism that would hold it
closed. The cure was to reverse the wires to the coil. Again, I don't
know that this would happen with an AC relay. Another was a small current
from a sneak path. Insert a milliammeter in series with the coil and look
for any current when deactivated. Good luck.

Ed Richards

On Thu, 11 Jan 2001 19:42:58 -0500 Louis Wiederhold
<lwiederhold at TOP.MONAD.NET> writes:
> This is not ham but old Heath stuff.  My latching relay 69-19, SPDT,
> 12 volt coil sticks.  I either need to replace it or have help in
> cleaning it.  Have tried WD-40 (bad as it gums up the lever) and
> acetone.  Any help most appreciated from a great group of guys.
> Opener modelGDA-20-3.
> 73, Lou
> WA1HGE
>
> Listserver Subscription:listserv at listserv.tempe.gov - "subscribe
> heath 'name' 'call'"
> Listserver Submissions: heath at listserv.tempe.gov
> Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff
> heath"

Listserver Subscription:listserv at listserv.tempe.gov - "subscribe heath 'name' 'call'"
Listserver Submissions: heath at listserv.tempe.gov
Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"