[TowerTalk] Johnson Matchbox coil

[Roger N0VR]

Tom (and all),

>From personal experience with a very similar restoration project, I found
that clear hot glue works great to "renew" the plastic spacing on an air
dielectric coil. Don't use the hot clue with pretty metal flakes that
crafters like, make sure it is the clear sticks.

Roger, N0VR

-----Original Message-----
From: Tom Osborne [mailto:w7why at verizon.net] 
Sent: Sunday, July 27, 2008 9:58 AM
To: Towertalk
Subject: [TowerTalk] Johnson Matchbox coil

Hi TT'ians

I have a 275 watt Matchbox antenna tuner that is in really nice shape, with 
a blown bandswitch.  I purchased another 'junker' from a guy, and really, 
the only thing wrong with it is the plastic on the coil has disintegrated 
and it is kinda dirty.  It looks like it could be repaired by making some 
plastic spacers of some sort.

What would be the best way to reinforce the turns in the coil?  I was 
wondering about super-glue.  Will it hold up in an RF environment?

Other than the coil being sprung, it isn't in too bad of shape.  I'd kinda 
like to repair it instead of taking the switch out and putting it in the 
'pretty' one.

73

Tom W7WHY