[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: Cap-driven x-former?
Original poster: "Godfrey Loudner" <ggreen-at-gwtc-dot-net>
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
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Monday, June 07, 2004 8:55 PM
Subject: Re: Cap-driven x-former?
Original poster: Jim Lux <jimlux-at-earthlink-dot-net>
This is basically the same transformer. (GE part 9T68Y5021G10 )
C&H Surplus has them as TR9407 for $50.
It works just fine without the capacitor (except for the power factor
There are several flavors of it that I've seen: a 220V version, a 50Hz
Yours is a 5022G10, which is probably a somewhat different
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.
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
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
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
> > > Inked
> > > > on the side of the unit is "General Electric part #
> > 9T68Y5022G10".
> > > for
> > > > Eastman Kodak (with an Eastman Kodak part #).
> > > > Cap is a 10uF 1000VDC oil-filled type.
> > > >