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I removed the transformer tonight and pried the bells off to see if I got lucky and it was just shorting out a bit inside the case. What a mess! The transformer is charred, with bits of ash raining out of the case. Whoever last powered this up must have left it on for quite a while before giving up, and I'll bet their house smelled great when it was over. Now that it is isolated, I can ohm it out much better, and it appears the failure is on the center tapped 5y3 secondary, but there is a lot more damage here than that.
On removing it, I found another item-a mystery winding that goes to the radio section. Looks like the transformers for the 801 (which I have the service info for) and the 802 are different. Guess I'll have to finally track down the SAMS for that. GE really loved packing in a lot of stuff in this transformer, I see that they used some shims to give the end bells the clearance they need.
My strategy now would be to make a power chassis, which would slip in where the record player used to be. I will probably have to buy two transformers, something like a 350-0-350 and a 450-0-450 and run them up to the main chassis through an umbilical cable. I can't be sure until I get the SAMS.
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