will a bad toroidal transformer cause transistors to overheat and burn in a amplifier circuit.......

 

It depends on what the transformer is being used for. If it's the power supply transformer, a failure will cause its voltage to fail and the associated transistors will run cooler while the transformer burns up.

 

As #12 says, if it's a power transformer it's failure is quite unlikely to cause overheating and circuit failure.

 

In what way do you suspect the transformer is Bad?
Max.

 

of all things that can go bad, it is rarely the transformer putting out too much voltage - I have never seen that. Too much current draw through the transistor (to few ohms on the load) is usually the cause.

 

well with transformer on, the transistors get hot enough to burn my finger, and i put a multimeter on the transformer to check its resistance and iam not getting a reading. if its not the transformer than what else would cause transistors to burn up, ive checked all caps and and resistors.

 

Please be reasonable. We don't know whether you are working on a childs' toy or the computer that runs the Coca-Cola bottling factory in Atlanta Georgia. How are we supposed to guess what went wrong???

 

and i put a multimeter on the transformer to check its resistance and iam not getting a reading..

...And that makes little sense either?
Max.

 

Not getting a reading as in, zero ohms or infinite ohms? Are you getting an AC voltage when your hot transformer is running? What else is getting hot? A large transistor, the output load, the rectifier diodes (diode bridge ), a section of the pcb.

 

okay so now i swapped out the transformer and all seems okay, the transformer had a shorted winding, thanks for the help guys, the amplifier is up and running

 

always good to see a happy ending