[Elecraft] auto-disconnect antenna relays? (KAT100 related)

Andreas Junge andreas at n6nu.org
Sun Oct 11 00:46:18 EDT 2009


Chris,

how about a 1Meg OHM resistor between the center of the coax connector
and ground. That should bleed off the static, but not mess with the
impedance.

Andreas, N6NU

On Sat, 2009-10-10 at 19:27 -0700, Chris Kantarjiev wrote:
> I've just replaced the 1N5711 SWR diodes in my KAT100 for the Nth time. It's annoying, but I guess 
> it's not annoying enough to cause me to disconnect my antennas every time I turn off the radio!
> 
> Here in "northern" California, we don't have many thunderstorms, but apparently we get enough wind 
> static to damage these diodes once every year or so. I really wish there was an idiot-proof way to 
> disconnect the antennas without any intervention on my part!
> 
> A small box that was powered from my 12v distribution panel and has two suitable relays in it would 
> be welcome. I guess I could make it myself, but I wonder if anyone else has already done so, in a 
> way that integrates cleanly to the KAT100 outputs? I wouldn't want them in the KAT2, since I operate 
> from battery at times. But when I'm running the KAT100, I am using more power than I have battery ...
> 
> (Does the K3 have such relays in the output circuitry?)
> 
> 73 de chris K6DBG
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