[TowerTalk] Fwd: Re: Johnson Matchbox coil

Commander John crazytvjohn at yahoo.com
Sun Jul 27 13:34:42 EDT 2008

Commander John <crazytvjohn at yahoo.com> wrote:  Date: Sun, 27 Jul 2008 10:33:21 -0700 (PDT)
From: Commander John <crazytvjohn at yahoo.com>
Subject: Re: [TowerTalk] Johnson Matchbox coil
To: Doug Faunt N6TQS +1-510-655-8604 <faunt at panix.com>

  You would want to use duco cement available at hardware stores. recomended by the arrl .  Safe in a dishwasher.  I just made one. it worked just fine. do not use super glue.
  john w9zy
  ~~~~~~~~~~~~~~~~~~~~ w9zy

Doug Faunt N6TQS +1-510-655-8604 <faunt at panix.com> wrote:
  Message: 7
Date: Sun, 27 Jul 2008 08:57:31 -0700
From: "Tom Osborne" 

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.

I have seen, on the web somewhere I think, information on making your
own air-wound coils that would be usefull to you.
IIRC, the process was to use plastic strips, making saw kerfs at the
right spacing and use the proper solvent for the plastic, with plastic
scraps dissolved in it, to close the kerfs.

73, doug

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