[TowerTalk] Identify Remote Rotary Antenna Switch

Bill Coleman aa4lr at arrl.net
Sun Nov 6 08:37:41 EST 2005

One of the things I picked up at a recent hamfest is the remote head  
for a rotary antenna switch. The switch is nearly 6" square, although  
one side is only 4". It has 6 SO-239 connectors and a terminal strip  
with 8 terminals.

Opening it up, it has a conventional ceramic wafer switch switching  
the SO-239s, an additional phenolic wafer that attaches back to the  
terminal strip. The rotary switch is driven by what looks like a  
phonograph or clock motor through a geared reduction.

I'm guessing this unit takes 25-30 vac to run the motor, which then  
stops when the correct detent is chosen. As I don't have the control  
head, I'd appreciate any information on this type of switch. I figure  
I can build a control box pretty easily with the right info.


Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
             -- Wilbur Wright, 1901

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