How do you test an output transfomer?

[phyrexia]

Got an amp, it has a probable blown OT. How can I verify this? Measure the resistance of the taps?

 

[Blueracer]

This should help.

http://www.geofex.com/ampdbug/outtrans.htm

 

[Boogiebabies]

What amp?

 

[phyrexia]

Ed, it's a Simul Mark III. 562003. This question is academic at this point, because the amp is in service now. But I'd still like to know.