RE: Aluminum tape on toroids? What about the sticky side being nonconducting?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "John H. Couture" <couturejh-at-mgte-dot-com> 


Jack -

Your concern is real. The aluminum tape adhesive is an insulator. With small
alum covered toroids I run a bare #28 copper wire around the inside and
cover the wire with alum tape. This connects all of the alum foil on the
toroid. Check the foil windings with an ohm meter to make sure the wire is
in contact.

John Couture

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-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Thursday, January 08, 2004 9:45 AM
To: tesla-at-pupman-dot-com
Subject: Aluminum tape on toroids? What about the sticky side being
nonconducting?


Original poster: Phlunktfysics101-at-aol-dot-com

I see lots of people using aluminum tape on their toroids.  My toroid is
made from aluminum duct riveted to a water heater pan, and I'd love to
smooth it out with aluminum tape.  But this tape has an adhesive backing,
making it nonconductive on the backside.  With no electrical conduction
between the aluminum side of the tape and the aluminum duct, what effect
will this have on performance?  And couldn't the adhesive act like a
dielectric and add more capacitance between the two aluminum surfaces (tape
and duct)?  It must not really matter, but I figure I had better ask the
pros before wasting money on AL tape.

Thanks!
Jack