1590E Power Amplifier

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Trying to build this but when I model it on Multisim, dozens of resistors are burning up. The only thing I can think of is that the step-up transformer at the output is causing it. Almost all the resistors near the transformer is burning up and a few in the middle of the circuit are too.

I have measured the resistance of the terminals of the transformer and there is very little resistance. I am pretty sure I have got the right turns ratio.

Does anyone have an idea as to why all these resistors may be burning up in my model?

As a reference:

http://alteclansingunofficial.nlenet.net/proelectronics/proamplifiers/1590E-Manual.pdf
 
I still have 4 from the old cleveland stadium. They are monsters. Make sure you are strapping the output trans correctly. Not sure how that works in a modeling program. I have the original schematics and parts list if you want it. The only problem I have ever had with these (in real life) is the volume pot going bad and serious clipping distortion til they were replaced.
 
Build it?

Or build a model of it?

Not sure what the purpose might be?

You can substitute a pair of resistors (assuming a grounded CT on the primary, didn't look) for the transformer at the output.

Perhaps your feedback loop is causing it to be an oscillator?

_-_-
 
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