Itsy Bitsy Teeny Weeny Transformers

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#2261

From: Mike Diack
Date: Thu, 22 May 2003 11:33

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I'm redesigning a device for blind navigation that I first designed a
decade or so ago, which requires a transformer to drive an
electrostatic transducer (sweeping 100..50KHz, around 100v P/P driven
from a 6v P/P source).
My first iteration used a (hand wound) Philips 10mm 3E25 toroid. I
gave one of my original samples to a local transformer outfit and
asked them to make me something smaller (and tidier!)
Everything they came back with was bigger than my original.
I have seen a polarisation tranny inside an AKG C460 microphone which
is smaller than the size of a frozen pea. Admittedly this tranny only
has to handle a single frequency wheras mine carries a sweep, but who
can make trannies like that or where can the cores be sourced
(preferably surface mount)
cheers
M

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From: moby@kcbbs.gen.nz (Mike Diack)
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Subject: Itsy Bitsy Teeny Weeny Transformers
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