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Hoffman Amps Forum image Author Topic: Transformer for Supra model 24  (Read 2340 times)

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Offline Big chief

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Transformer for Supra model 24
« on: June 28, 2020, 07:48:58 am »
Does anyone know what transformers are used on the Supro model 24
And where to purchase them
Thanks

Offline shooter

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Re: Transformer for Supra model 24
« Reply #1 on: June 28, 2020, 08:56:01 am »
a schematic might help to count tubes n figure current and get idea on voltage.
Went Class C for efficiency

Offline sluckey

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Re: Transformer for Supra model 24
« Reply #2 on: June 28, 2020, 09:24:38 am »
I used a Hammond AO-24158-0 OT and a Hammond AO-24157-1 PT on my S-6424. Got 'em from eBay.

A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline vampwizzard

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Re: Transformer for Supra model 24
« Reply #3 on: June 28, 2020, 09:29:18 am »
Was just gonna say Sluckey built one and documented it. His copy of the original schematic is cleaner than the other ones floating around the internet.

http://sluckeyamps.com/supro/supro.pdf

Offline Big chief

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Re: Transformer for Supra model 24
« Reply #4 on: June 28, 2020, 10:49:20 am »
Many thanks for the info

Offline SILVERGUN

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Offline shooter

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Re: Transformer for Supra model 24
« Reply #6 on: June 28, 2020, 02:13:41 pm »
 :laugh:
does someone have the decoder ring that gets me from;

"model 24" to "S-6424" 
I know, I need to be a Musician to understand   :think1:
Went Class C for efficiency

Offline SnickSound

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Re: Transformer for Supra model 24
« Reply #7 on: June 28, 2020, 02:39:17 pm »
Does anyone know what transformers are used on the Supro model 24
And where to purchase them
Thanks

I used a Hammond set meant for a Princeton Reverb for mine. Voltages were in line.
OT specs have changed along the years from what my research told me. The Hammond was 8.5K primary but apparently 7K is more correct.

 


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