Author Topic: new output transformer for model T question......  (Read 3642 times)

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Offline cromag

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new output transformer for model T question......
« on: June 13, 2006, 10:33:29 am »
does anyone know if any place makes a replacement output transformer that will work in a 76 model T?

Offline inky

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Re: new output transformer for model T question......
« Reply #1 on: June 13, 2006, 11:39:11 am »
to my knowledge there isn't one...you can always have the original one re-done at mercury magnetics.

Offline AdmiralB

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Re: new output transformer for model T question......
« Reply #2 on: June 14, 2006, 07:08:48 am »
You've got several problems - first, I don't know of any 120W-class OTs that have both a 2-ohm AND a 16-ohm tap.  Second, I can't think of ANY OT that big that Z-mounts.  Add the fact that you need ultralinear and I think something will have to give.  You'll either lose a tap, have to fab up something for upright mounting, or both.

Offline cromag

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Re: new output transformer for model T question......
« Reply #3 on: June 14, 2006, 03:52:33 pm »
admiral B,  is it possible to mod the amp to allow a completely different O.T. in it's place.   i really only want possibly a 4, 8 and 16 ohm tap.  or at the very least 8 and 18.   could a fender or marshall O.T. be substituted?  with the generous help from joearthur, i am still figuring out if in fact the O.T. is damaged.    to be continued....

Offline Sparks

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Re: new output transformer for model T question......
« Reply #4 on: June 15, 2006, 11:29:31 am »
I am not shure but wouldn't hammonds model 1650T output trans work ??
    
120 watts
   
1,900ohms ct Push-Pull Par. 403 ma.4-8-16ohm taps40% screen taps for Ultra-Linear operation Frequency response 30 Hz. to 30 Khz. at full rated power (+/- 1 db max. - ref. 1 Khz) minimum. (4 or 6 Tubes) 6L6GC, 5881, EL34, 6550B, KT88

go to

http://www.hammondmfg.com/1608.htm

and all the specs are there.


   

   

   

Offline cromag

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Re: new output transformer for model T question......
« Reply #5 on: June 15, 2006, 04:28:21 pm »
thanks for that tip sparks.   huh.

Offline AdmiralB

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Re: new output transformer for model T question......
« Reply #6 on: June 16, 2006, 06:49:56 am »
I am not shure but wouldn't hammonds model 1650T output trans work ??
 

Yes, but....you can't wire a Hammond up to a typical impedance selector switch.  Look at the wiring diagram - to get different taps, you have to parallel/series/strap leads together.  You'd need some kind of multipole rotary switch to do this.

I'm not saying it can't be done, just that it ain't a plug-and-play.