RE: Cap-driven x-former?

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

Original poster: "Godfrey Loudner" <ggreen-at-gwtc-dot-net> 

Hello All

Tom McGahee's summary of these H&R transformers can be located at the
Tesla-2 list in the Old Archives, Mar 14 1997 to Apr 10 1997 Archives. I
think its at Mar 21 1997. The third winding is referred to as a resonant
winding that causes the open circuit voltage to jump from 2.7KV RMS to
5.4KV RMS.

Godfrey Loudner

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Monday, June 07, 2004 8:55 PM
To: tesla-at-pupman-dot-com
Subject: Re: Cap-driven x-former?


Original poster: Jim Lux <jimlux-at-earthlink-dot-net>

Check out:

http://home.earthlink-dot-net/~jimlux/hv/xfmrex1.htm

This is basically the same transformer. (GE part 9T68Y5021G10 )

C&H Surplus has them as TR9407 for $50.
http://www.aaaim-dot-com/u/web/aaaimc/cgi-local/shop991/shop.pl/SID=23858485
20/page=TRFS.htm#TR9407

It works just fine without the capacitor (except for the power factor
being
terrible).

There are several flavors of it that I've seen: a 220V version, a 50Hz
version, etc.

Yours is a 5022G10, which is probably a somewhat different
configuration,
but fundamentally the same.

FWIW, I don't know that GE ever made ferro-resonant transformers.

I haven't been able to find out how it was used in the copiers.
Originally,
I thought it might be used to run an arc lamp, but the voltage is awful
high.  So, my latest guess is that it was used to charge a reservoir cap
to
fire some very bright flash tubes. Kodak had some very fast photocopiers

back in the late 70's early 80s that used a fairly large array of flash
tubes, and looking over old EG&G literature, I think I found the tubes
that
they used.

At 06:28 PM 6/7/2004 -0600, you wrote:
 >Original poster: "Jim Mitchell" <Electrontube-at-sbcglobal-dot-net> Well I'd
 >think it was ferro-resonant, because he says the output is horrible
 >without the capacitor.  Google could tell more then I could,  as I
 >don't know much about the ferro-resonant circuit.
 >
 > >  >  >      More specs: Seller advertised it as out of a copier power
 >supply.
 > >  > Inked
 > >  >  > on the side of the unit is "General Electric part #
 > > 9T68Y5022G10".
 >Made
 > >  > for
 > >  >  > Eastman Kodak (with an Eastman Kodak part #).
 > >  >  >      Cap is a 10uF 1000VDC oil-filled type.
 > >  >  >