WB5VZL switch question

Robert E Naumann bob at micro-c.mcds.com
Fri Jan 1 08:41:28 EST 1993


Hi George and everyone else! HNY etc.
George;  At K2GL (N2AA) and N2RM the Bird model 72R coax switch has been 
used with good results.  The switch is a "swapper" 4 pole switch.  K2TW 
( I think) calls them "plunger" switches.  To actuate it you pull on the 
large knob, rotate it 90 degrees and press it back in.  This swaps 2 
antennas  between 2 rigs.  I have found that certain rigs don't like 
having their grounds tied together in this manner which results in some 
inter-radio noise when one is transmitting.  This was seen with my TS940 
and WM2H's TS940 on 10 meters at N2RM - however, at K5NA's a couple of 
years ago this arrangement worked without any problem with my '940 and a 
TS930.  This solution is not automatic, but it's pretty fast.  You should 
see N2AA in action with one of these!  They are fairly pricey if bought 
new, I think they are over $100 -  I found one at a flea market here in 
NJ for $3.  Obviously, the guy had no idea of the worth of it. 
73, Bob KR2J




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