[TowerTalk] Line suppressors

[CubexCo at aol.com]

In a message dated 3/17/2006 8:34:13 PM Eastern Standard Time, 
towertalk-request at contesting.com writes:
Anyone out there built their own suppressor for rotor/switch control lines?
It seems the commercial ones are just boxes with MOV's across the lines, and
the MOV's are cheap.
I am doing a new install with about 36 wires going various places up the
tower, and buying the ICE or other commercial devices are getting expensive.
If you have "built your own" what varistor did you use?

Bob, W5LT
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Bob,
Your observation of what is inside the various commercial boxes is the same 
as mine, and I proceeded to build my own lightning protection devices.  JAMECO 
has a good selection of MOV's usually less then $0.60 ea.  Note the voltages, 
so as to be sure that the normal voltage on the lines you are protecting does 
not exceed the limits.  Most commercial boxes are rated only for low voltage 
lines (less than 50v), and I was protecting 115v control circuits so the custom 
design was necessary.

Regards,
Norman W4QN