toroid transformer Q

[Hairy Harry]

Hi John (et al)

A Plastic screw is non-conductive....
A Brass screw is non-magnetic...

The plastic screw WILL solve the problems by not
conducting electricity - the path is broken.

A Brass screw is usually used in the presence of
high frequency magnetic fields that would induce
eddy currents in the material itself, causing
heating.  Reminds me of the time I put a steel
screwdriver into a horizintal oscillator coil on
a monitor... OUCH very HOT right NOW !!!

But at 60Hz its moot point... steel is fine !!!

Brass or aluminum will not help if you create a
shorted turn, they still conduct electric current
and non-magnetic will not help...

The best solution is ..."don't do that" (create a shorted
turn)...

Most Toroids have a mounting washer supplied. I got one with
my 1300VA unit that powers my whole studio (isolation). The
bolt is a 1/4-20 and the whole thing weighs about 15 lbs.

No problems mounting it. Might not work in an off-road vehicle
(for very long) but normal use is strong enough.

Brass is really kind of wimpy ... not very strong.

H^)  harru


>From: John E Blacet <blacet at monitor.net>
>Reply-To: blacet at monitor.net
>To: Hallgeir Helland <hhelland at mailandnews.com>
>CC: DIY <synth-diy at node12b53.a2000.nl>
>Subject: Re: toroid transformer Q
>Date: Fri, 18 Aug 2000 07:43:48 +0000
>
>Perhaps a non-magnetic (brass, plastic) mounting screw is called for?
>I have a few toroids around but have not mounted them yet and have not
>really seen any info on mounting. ALL of them do have screw holes in the
>center though....
>--
>
>Regards.
>-------------------------
>John Blacet
>Blacet Research Music Electronics
>http://www.blacet.com
>-------------------------
>blacet at monitor.net
>-------------------------
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>http://www.blacet.com/mailform2.html

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