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Subject: Re: Transformer tape?
X-Newsreader: Forte Agent 1.91/32.564
Date: Mon, 23 Dec 2002 20:07:26 -0800
NNTP-Posting-Date: Mon, 23 Dec 2002 20:07:15 PST
X-Received-Date: Mon, 23 Dec 2002 20:07:15 PST (newsfeed.avtel.net)
On Mon, 23 Dec 2002 17:09:44 -0800, "Christopher R. Carlen"
>What's the soft yellow tape I'm peeling off of the PC power supply
>I am interested in getting some proper tape for insulating the layers of
>my SMPS transformers. What should the material be? I expect it is
>designed for higher temperatures than the average masking tape, eh?
>Where to get some?
>Thanks for tips.
The tapes I use for xformers:
3M Electrical Tape:
79 Glass cloth tape for outer wrapping if I need protection.
56 Mylar tape (yellow stuff). Good general purpose tape.
1205 Polyimide tape. For high temp windings.
I normally use #56. Buy a 1" or 1/2" wide roll and cut the width you
need with a modeling knife. If your into production, then have the
distributor precision slit the tape for you. I only use #79 as an
outer wrap if I need to protect the windings from abrasion or if I'm
making large transformers. #79 is really strong, so it's useful for
other tasks. Polyimide can handle soldering iron temperatures without
Copper foil tape is nice if you need strap windings or electrostatic
shielding between windings. For electrostatic shields, don't let the
ends touch or you will have an equivalent of a shorted winding.
Places I bought tape from in the early 90's:
Advance Group (714) 870-0300
REMCO (818) 761-5564
Phone numbers are from 10 years ago, so might not be valid.
Santa Barbara, CA
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