Hammond M-103 Reverb Amp Question

[PrinceByTor]

One of the electric musical instruments I own is a ‘63 Hammond M-103 organ. Some years ago whilst playing the reverb just quit and I got smoke and a sizzling sound coming from the transformer for the AO44 reverb amp. Now, the rest of the organ still works, but I’d like to get it going again.
I have already found a replacement transformer online for about $300, but my question is: is the transformer repairable and/or worth fixing as it is?
With some amazing amp gurus on here that I think a lot of I figured I should ask first.
@agedhorse @Wasnex @beans-on-toast ?

below is a photo of the part in question, it’s the big black one.
Still have the tubes by the way, just had to remove the one to access the transformer.

Anyway, thanks in advance!

 

[Wasnex]

$300 seems excessive.

I have never done it, but supposedly you can tear down some transformers and have them rebuilt. Beans knows a lot more about this than I.

I see current and legacy listing for the entire AO-44 for less than $100 on Reverb.

I don't guarantee this is correct:

HAMMOND AO-24956 250-0-250V @65MA, 6.3V @2.3A

You could call Heyboer and Mercury Mags to see if they already have a workup.

Found this, but they say call for pricing. MRT-1 (tompetro.com)

Before installing a new PT, it's essential to fix any problems with the circuit that may have caused the old PT to fail.

 

[PrinceByTor]

$300 seems excessive.

I have never done it, but supposedly you can tear down some transformers and have them rebuilt. Beans knows a lot more about this than I.

I see current and legacy listing for the entire AO-44 for less than $100 on Reverb.

I don't guarantee this is correct:

HAMMOND AO-24956 250-0-250V @65MA, 6.3V @2.3A

You could call Heyboer and Mercury Mags to see if they already have a workup.

Found this, but they say call for pricing. MRT-1 (tompetro.com)

Before installing a new PT, it's essential to fix any problems with the circuit that may have caused the old PT to fail.

Thank you, I’ll look into that.

 

[Hoochie Coochie Man]

You can find some technical information, advice, and parts sources at the Organ Forum. Go to the Hammond specific forum here: Hammond Organs - The Organ Forum

 

[beans-on-toast]

One of the electric musical instruments I own is a ‘63 Hammond M-103 organ. Some years ago whilst playing the reverb just quit and I got smoke and a sizzling sound coming from the transformer for the AO44 reverb amp. Now, the rest of the organ still works, but I’d like to get it going again.
I have already found a replacement transformer online for about $300, but my question is: is the transformer repairable and/or worth fixing as it is?
With some amazing amp gurus on here that I think a lot of I figured I should ask first.
@agedhorse @Wasnex @beans-on-toast ?

below is a photo of the part in question, it’s the big black one.
Still have the tubes by the way, just had to remove the one to access the transformer.

Anyway, thanks in advance!

View attachment 5297521

Builders like to use that amp as a platform for guitar amps. Smoke from the transformer isn’t good. I’d disconnect and test it and the related power supply circuits. Wasnex specs are correct.

____

For reference, most often the problem with these amps is with a tube or the reverb tank. Technical details and replacements are available at Antique Electronics. You will need the right type of tank.


Accutronics Products and Specifications | Antique Electronic Supply

https://www.tubesandmore.com/search/node/reverb tanks