I had a similar isolation problem between ANT 1 and ANT 2 in my KAT100,
discovered by accident after working somebody in EU on 15m using a shielded
dummy load connected to ANT 2. Replacing the bare leads between the
switching relay and connectors with coax increased the isolation
significantly, but I also had to add a smallish relay at the ANT 1 / ANT 2
switching relay K18 to ground the connection not in use to achieve
acceptable isolation on the higher bands. A DPDT relay to both switch and
ground together with coax would of course be a better method. YMMV with the
K3.
73,
Geoff
GM4ESD
Stewart Baker wrote on Wednesday, July 16, 2008 at 5:23 PM
David,
A very good point. Although the space is rather restricted for
RG58/U it should be possible to fit some of the smaller diameter
cable such as that used to connect between VHF/UHF PCB's.
I have some silver braided coax that would be suitable.
It would have little adverse effect over such a small length, but
might provide additional isolation.
Food for thought...
73
Stewart G3RXQ
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
