My Prodigy has a corroded base to one of the three circuit board wires coming out of it’s step down, power supply transformer. The wire and connection plate came off in my hand upon inspection and it looks to me that the thing is toast. Does anyone have any information on a replacement? The prodigy has a chassis/ internal transforme, 110 - 24VAC … are these available anywhere? Or are there special specs with this moog one?
Any 110-125 volts AC input, 20 to 24 volts center tap output, 1 to 2 amps capacity transformer should do fine.
Are you near the Montreal area in Canada ? If so, there’s a store called Addison Electronics (or Maddison in Laval) that certainly carry some. Elsewhere in Canada, there’s always Active Electronic. Or, online with Digikey, Mouser, and such…
EDIT Here’s the page for Active Tech in Canada (it’s the sixth or seventh item down that page): http://www.active123.com/prodList.asp?strSearch=power+transformer
You can check out their different store locations around the country for one near you. Or you can order one online.
Come to think of it, I remember that the same thing had happened to me, back in the eighties, with my MG-1 which had the same type transformer. And I had managed to re-solder the wire, though precariously…
The problem was that the wires coming from the main board to the transfo were too big and too stiff needlessly. They were capable of handling 5 amps ! 
When only 3/4 amps was going thru them… 
Merci aliensixes! You’ve been keeping my head above water with what I thought was going to be a key replacement and cleaning ONLY! 
I swapped 4 new Bourne tuning pots, fixed two switches, resoldered some LHC wires and the ol’ girl played like the day she left the line … all until my power supply started sizzling! I think you’re right about the wire thickness, in my case, I peeled back the charred tape around the lead wire connectors and found that one of the lead posts had broken away (no doubt during my dismantling) from where it was attached to some soft metal encasing the transformer. I did jam the post back and loaded in the solder, hoping it would fill the corroded gaps. It looked good and played until the sizzling continued and I shut down operations for the night. I’ve sourced a new transformer locally which hopefully is the cure and I can finally get back to worrying about how white my slider caps are Again many thanks for the tipz!!!
You’re welcome HIMMM !
Glad I could be of some help to ya. 
I finally picked up a transformer from a local electric supplier. A little off topic but I had called them twice and was quoted two different prices … interestingly enough when i got there I was told they had two in stock, one from China for $18 and one from Canada for $25. I asked for the Canadian made one of course but wanted to see the difference. They were absolutely (same factory) identical and upon inspection the Canadian one was “Made in China”. I paid $18 and left, lame
I did forget to bring in the one from my prodigy with me to the store and now that I’m home, am shocked at how much larger the new transformer is. It’s 115V 60Hz to 24.0 VCT , 2 amp but it’s twice as big and 3 times as heavy. I don’t doubt it will work but mounting something that heavy to my prodigy’s dainty sheet metal back is a little worrisome. Should I go back on the hunt for a smaller one or is there a better place to mount the sucker (floor pan most likely)?
The Prodigy isn’t a power hungry beast. Its internal voltage regulators are only capable of delivering 1 amp each, and I’m sure they’re not even at 50 % of their capacity with op amps and such. If the 2 amps transfo is too cumbersome and heavy needlessly, it could be worth it to exchange it for a smaller 1 amp one.
Trying to relocate a bigger transfo could bring unforseen problems like hum from the electromagnetic field around it affecting the VCA or output section… (happened to me on a Korg Mono/Poly once)
The mounting location, and angle, at which the original transfo was, is probably the best for lowest interference on sensitive audio circuits.
The AC fuse for a prodigy is just 1/8th amp. (125ma)
That’s 1/16 of 2 amps, so a 2 amp transformer is considerable overkill.
You’ll need a transformer that’s roughly 300ma to 1 amp.
Make sure that the new transformer fits the same mounting holes that the prodigy has.
Also make sure it has a center tap and enough voltage for each of the windings.
15 to 25 volts per winding is fine. (sometimes expressed as 30-50 volts with a center tap.)
Allied, Newark, Mouser, MCM, Jameco and others carry such transformers,
Here’s some possible replacements, but it’s up to you to measure specs, mounting holes, clearance, etc
http://www.allelectronics.com/make-a-store/item/TX-241/24-V.C.T.-1-AMP-POWER-TRANSFORMER/1.html
http://www.mouser.com part number 553-F57X
According to my calculations, with a 125ma fuse on the 120v input, the maximum power output on a 24vct output transfo will be 625ma (slightly more until the fuse on the primary blows). So a 1 amp transfo is ideal. And that is probably the power capacity of the original.
300ma capacity transfo would be a little tight, I think… Although it could probably power everything fine, as the maximum capacity of the input fuse will surely never be reached under normal operation.
Short a 300ma transformer and see if a 1/8th amp fuse blows.
There’s continuous rated current and then there’s maximum dead short current (crowbar test) .
Either way, the Prodigy doesn’t take much power I agree.
You could probably power it off solar cells.
The first environmentally friendly analog synth ever ? Cooool ! 
Thanks guys … Currently she’s up and running with the 2amp beast until a smaller one comes in the mail.
I am having a new issue with my tuning trimpots. Seems the pots I got are single turn despite asking the sales person repeatedly to send multiturns … blah but ok. I realized it only upon first tune and they worked like the old ones right off the bat. Now all of a sudden, Osc 1 is detuned 6 steps and drifting and dancing like a frantic hummingbird. Osc 2 is still a champ.The range pot seems to be the culprit, I’m assuming a bad solder on my part or maybe a damaged component. It will stabilize when I turn the pot dial to either extreme (way out of workable tuning range) but as I tune it down, about mid-turn, it skitzes out, drops and waivers. I’m hoping I’m not dealing with another blown part unrelated to the tuning pots somewhere else on the board, any reads on the symtoms? I’m off to resolder and pray for no shorted burns and a smooth pot once again.
Does anyone know where / have a part number for the same type of transformer for UK use? 220 ~ 240v
My Prodigy sound very unwell, transfor is only delivering 18v so I think I need a new one!
Cheers!