Yamaha c-70 power transformer

[Larryjmoore]

Need some help with my c70 preamp. The power transformer went bad and there is no replacement or info from Yamaha, as they've purged any info on it.
The transformer is "ga6520" and is 120v in but I have no idea what the output is. The secondary is center tapped. Anyone know what the output voltages are?

 

[avionic]

That power transformer has a fuse internally. A 35-0-35 or 70vct would probably get you there.

 

[avionic]

Sometimes the fuse can be repaired.

 

[Larryjmoore]

Really? Wow. Never heard of an internal fuse in transformer. Good to know. Not sure how to repair it as it is encased in epoxy. Knowing the voltage is something I can work with, heck i think I even have a transformer that will work. Thanks so very much.

 

[avionic]

Not sure how to repair it as it is encased in epoxy.

Thats the hard part. Digging out the potting.

 

[avionic]

May be able to find a small enough toroidal.

 

[avionic]

http://www.antekinc.com/content/AN-0232.pdf

 

[avionic]

http://www.antekinc.com/an-0232-25va-32v-transformer/