[Amps] Remote QSK

[Vic K2VCO]

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