[Elecraft] Re: Question re K3 diversity reception

[wayne burdick]

Dr. James C. Garland wrote:

> In using my K3 for diversity reception, I use my G5RV antenna on the 
> AUX subreceiver input, and my SteppIR for the main 
> (transmitting/receiving) antenna.  When I’m transmitting, does the K3 
> short the input to the subreceiver AUX input, or otherwise protect the 
> input from damage?  I’m using an amplifier, and the G5RV probably has 
> many volts of RF induced on it when I’m transmitting, and I don’t want 
> to damage anything.  Sorry if this has been covered before or, worse, 
> if the answer is in the manual.

Hi Jim,

The KRX3's AUX input is protected by a gas-discharge tube, bleeder 
resistor, and carrier-operated relay. It is very unlikely to be 
damaged. However, activation of the COR (which you would hear as you 
key the rig, etc.) can be disruptive to T-R sequencing. If you hear the 
COR relay go on, I'd strongly suggest that you either reduce the 
coupling between the two antennas or provide external switching or 
shorting (this could be done via the KEY OUT jack on the K3).

73,
Wayne
N6KR

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