[Elecraft] Using K2 rant input

[Vic Rosenthal]

W3FPR - Don Wilhelm wrote:

> I don't have the full answer, but can offer this 'food for thought' -- The
> Rant input (when active) is connected to the output of the K2 T/R switch
> when in use, and when the Rant is not being used that point is subjected to
> the full output of the base K2 output collector RF voltage - so I would
> conclude that it should handle up to 15 watts of RF induced onto the Rant
> input jack, but OTOH, I have not tested it.

I was just looking at the circuit and I think you're right.  Let's see, 15 watts 
in 50 ohms comes out to about 27 volts.  I can put a 47 ohm resistor across the 
antenna without significant signal loss, so the impedance cannot rise above that 
level under any circumstances.  The t/r switch diodes will be cut off so there 
won't be harmonic generation from this source.  Now I just need to measure the 
RF voltage with my scope and make sure that this level isn't exceeded (with 
plenty of safety factor!)

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco