Gary Smith wrote:
> I've got an unused silicone covered RJ1A vacuum relay which would be
> perfect for quiet relay operation and I would be more than happy to
> homebrew my own remote QSK rather than buying the assembled unit but
> all my google searching has not come up with a schematic to build a
> remote QSK. Does anyone know of a link that can help me find a
> working schematic for this?
I did this with the Rich Measures circuit. I put a vacuum relay in one small
aluminum box
and reed relay in another. A third box contained the power supply, transistor
switch, etc.
The relay boxes can be attached to the back of any amplifier with double-male
coax
adapters, and there's a short coax jumper between the two (I used BNC's for
this). I feed
the relay voltages through feedthrough capacitors to reduce the chance of
feedback around
the amplifier.
It's a bit haywire compared to simply installing the system in the amplifier,
but it's
useful if you want to QSK-ize an amplifier that you don't intend to keep.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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