[Elecraft] other xmitter nearby

[dj7mgq at muenchen-mail.de]

Hi Charles,

at our contest QTH we have low loss band pass filters between the  
transceiver and the PA  
<http://www.bavarian-contest-club.de/projects/bandpassfilter/100W-BP.pdf> (in  
German).

These filters protect the the receivers on other bands, e.g. we have a  
multi-band beam and a 40m beam close together on the same tower, and  
when transmitting on one of the antennas several watts come back on  
the other antenna. Also they cut down the wide band phase noise.

4O3A uses filters at the kW level to do the same. When I was in  
Montenegro at Ranko's station, he had the prototypes in test and they  
worked surprisingly well.  
<http://www.yt6a.com/en/hi-power-filters/high-power-band-pass-hf-filters.html>.


> desensed nearly to zero

I do not know if this has been implemented yet, but Wayne was planning  
on watching the return power during reception, so that he could  
protect the front end of the K3. Maybe this could be part of what you  
are observing.

vy 73 de toby