Hammond Organ Transformers - Unknown Spec/s

[dawsonaudio]

I've got some remaining transformers from a Hammond M3 organ parts box that I'm trying to use somewhere.  The box has been sitting for a while now and I'm not sure what the spec's are on a few of them.  Looking at the Hammond M3 schematic/parts list, they are more than likely the Percussion Input, Output and Matching Transformers (T4, T5, T6).  I've already used the power transformer and output transformer for a guitar amplifier.  Here is the online Hammond Manual.  https://archive.org/details/HammondOrganServiceManual-ModelsMM2M3M-100.  Towards the end of the manual is the parts list.

The input transformer is labeled AO-24113-0/549-6408.  The output transformer is labeled AO-24112-0/549-6417.  The matching transformer is labeled AO-22064 and has two sections to it.

Could these transformers be used for a Pultec EQP-1A build? I don't have too much test equipment to figure out the spec/s.  I've got a few digital multi meters at hand.  The transformer/s cores are around 5/8inch thick/1-7/8 wide/1-9/16 long.

Thanks for any help here.

 

[pucho812]

might find that info in the service manuals
https://archive.org/details/HammondOrganServiceManual-EarlyModelsabcSeriesB3A-100RtDG

https://archive.org/details/HammondOrganServiceManual-ModelsMM2M3M-100

 

[PRR]

Post a circuit-snip so as we can find it.

This is a "VCA". Put point "V8" at about +27V, 12AU7 is cut-off, no sound. Pull V8 up to near +36V, sound gets louder.

I do not think this is suitable as-is for ANY studio interface. The impedances are strictly for internal use. We get a clue of the output because it switches from 33K load to 8K load to get a lower volume, so it is far-far up from "600 Ohm" interface. You might add a lot of stuff to make a "limiter", but I dunno about sonic quality on an organ's percussion add-on.

 

[dawsonaudio]

Thanks for posting the image of the schematic as I should have done that on my initial post.  I assumed the transformers were designed specifically for this particular amp circuit, but I just wanted to double check.  Thanks.

Nate