RE: Buzzing xfmrs

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

Original poster: "Pete Komen by way of Terry Fritz <twftesla-at-qwest-dot-net>" <pkomen-at-zianet-dot-com>

Matt,

If you have a variac with 140v output, use that with a voltage doubler.  It
would get close to 400 volts.

Pete Komen


Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Fucian-at-aol-dot-com>

In a message dated 4/8/02 10:53:34 AM Eastern Daylight Time,
tesla-at-pupman-dot-com
writes:

<< Matt,

 You can't do this. It isn't possible to reverse a low-votage tranny and get
a
 HT one, since

 1 - The Mains side is not insulated enough to output more than a few
hundred
 V.

 2 - The LV side does not have enough turns to be run at 240v - you need a
 certain number of turns per volt, or the core goes into saturation (= nutty
 current draw and buzzing).

 3 - Following on from the former, the core is too small for any decent
level
 of power - it's designed for the 20 watts or so and that's it. You're not
 going to be able to make a 1kVA plate tranny out of this core.

 You need a real plate Xfrmr, or perhaps a microwave oven one - but you need
 to be very, very careful with these since that have no current limit and
 could kill you instantly.

 Be careful

 Alex
  >>
Hehe,oh. What about a 100watt core?16v 6.25amps.I dont want much
voltage.Just
enoguh to charge a 450volt 3500uF capacitor.And I know there are better way
sof doing this.Like winding a highfrequency ferrite type but im just looking
for a quick fix.
LOL.

Thanks,
Matt