Donald P. Butler wrote:
>
> I cooked a couple fingers on the rotary wafer switch in one of my
> SB220s last weekend during the contest.
>
> I checked with Al, WA4DRU, who sells Heath amp parts and upgrade
> kits.....he no longer has them available
>
> Does anyone know of a possible source for a replacement? ..or
> suggestions for repairing the bad switch?
>
> Hopeful??
>
> Don, N5LZ
>
Hi Don,
When I acquired an SB-220 a few years ago, it has several burned
contacts. After looking unsuccessfully for a replacement at a reasonable
cost, I went the repair route.
At a hamfest, I found some switches with nice gold plated contacts for
about a dollar per switch. I drilled out the rivits holding the
contacts, and fitted them to the damaged switch (I replaced them in
pairs--one on each side of the wafer). To hold the new contacts in
place, I cut a piece of thick copper wire, and inserted it through the
rivit holes and through the switch wafer. I then soldered the contacts
into place against the shaft of the copper wire.
Obviously, this is delecate work; but if you're so inclined, you can make
the switch as good as new.
Good luck,
Dan - W4TQ
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FAQ on WWW: http://www.contesting.com/ampfaq.html
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