[TowerTalk] Shielding of antenna switching/interstation interference

[Tom Osborne]

>I am trying to track down a source of inter-station interference between
> my two radios when using them for SO2R contest operation.
>

Hi Pete

I read somewhere that if you have 2 boxes physically connected in any way, 
that can be a path for interference.  It seems if your boxes are all 
connected to the same aluminum plate, that may give a path for interference.

I had 2 switches in a BIG aluminum box that switched antennas to each radio, 
and had quite a bit of interference.  I redid the whole switching 
configuration and made a bunch of 2 postion antenna selector switches--one 
for each antenna.  The output of each switch goes to an 8-position antenna 
switch for each radio.  That way I can select any antenna to go to any 
radio.  It's not automatic by any means, but sure did cut down on the 
interference.

I put my stubs on the 2-position antenna switch so that no matter which 
radio I'm on, it has a set of stubs on the antenna.  73
Tom W7WHY