[Elecraft] K3 Audio routing question

[Phil & Debbie Salas]

"...However, where I am having an issue is when my poor receiving Vertical 
antenna is NOT receiving a signal my Well receiving Horz antenna is, and 
then Some times reverse. I would like to be able to "mix" the main onto the 
sub, and the sub onto the main's earphone.."

The only way this would work is to always mute the weaker side, and always 
feed the strong side into both headphones.  As stated by several others 
here, true combining would not work because of the varying phase difference 
between the main and diversity inputs.

We implemented combining for diversity digital (QAM) receivers back in my 
microwave days at Rockwell.  The IF combiner continuously rotated the phase 
of the diversity receiver so as to keep the combined amplitude at a maximum. 
This was not a trivial process.  And, of course, both receivers were fed 
with the same local oscillator.  For analog receivers, we used a simple A/B 
diversity switch where we switched to the stronger side when the signal we 
were on was getting close to threshold and the other side had a better S/N. 
Couldn't do this with digital signals since a simple switch would cause a 
frame hit/re-sync.  So the IF combiner was used for diversity reception in 
our digital radios.

Phil - AD5X