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Re: [Amps] FW: glass tape ?scotch 27

To: "Larry Carman" <>, <>
Subject: Re: [Amps] FW: glass tape ?scotch 27
From: "Mike McCarthy, W1NR" <>
Date: Thu, 15 Jun 2006 11:52:38 -0400
List-post: <>
Not a spray, but I use GC Electronics Q-Dope.  Of course, I wrap the core 
with glass tape first.  I guess you could use Q-dope directly.

Mike, W1NR

----- Original Message ----- 
From: "Larry Carman" <>
To: <>
Sent: Thursday, June 15, 2006 11:33 AM
Subject: [Amps] FW: glass tape  scotch 27

Is there a HV spray ( like flyback coating ) that can be applied to toroids
that would be acceptable.

Larry N5BIP

-----Original Message-----
From: [] On
Behalf Of Peter Chadwick
Sent: Wednesday, June 14, 2006 9:37 AM
Subject: Re: [Amps] glass tape scotch 27

Will asked:
> Again, what's the use in using a tape that I would think could be replaced
with something much cheaper for us poor folks<
If you're building a one off (as so many hams do), you probably don't worry
too much about scraping around for a roll of tape if finding something
cheaper will take too long and may not do the job. It may even be the case
that there's some 'surplus' at work! In business, it's another matter, and
at a company where we used dust iron toroids in tank circuits at 100 watts
with 6146Bs, we wrapped the cores in PTFE (sorry - Teflon) plumber's tape,
which is about 0.004 inch thick, but cheap. I suspect Teflon tape would do
instead of the Scotch fibreglass stuff, assuming you can get it.
Peter G3RZP
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