[Elecraft] K3 antenna bleed thru

[Richard Ferch]

NF4L wrote:

> I was helping a friend with his remote setup. We were on 20M CW, and I copied
> him about an S5. He couldn't hear me at all (both 100W).
>
> Later I realized I was on ANT 2. Why was I able to hear him so well? Do I have
> a problem?

Well, suppose the isolation between ANT1 and ANT2 is 50 dB. A signal 
from your friend that would have been 30 dB over S9 on ANT1 would show 
up at S5 or S6 on ANT2 due to the -50 dB bleedthrough.

In the other direction, you were transmitting into a high SWR. To 
protect itself the transmitter would have folded power back to some low 
level, and on top of that there would still be the 50 dB of isolation 
between the transmitter and your antenna, so perhaps it's not so 
surprising he couldn't hear you even though you could hear him.

73,
Rich VE3KI