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Re: Cap-driven x-former?

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

Check out:


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 being 

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
> >  > 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.
> >  >  >