Federal SS2000 output transistors.

[billforbush]

I have a SmartSiren that works perfectly except that it seems quieter than it should. I disconnected one 100w speaker and tested the AC voltage across the line - 11 VAC. Is it likely to be the output transistors? And if so, where can I buy new ones? Any help appreciated.

 

[Tony P]

@MtnMan may be able to help diagnose this

 

[MtnMan]

The output voltage should be 32 VAC, measured across the blue and brown speaker wires. Try checking it again with both speakers disconnected.

It might be a bad output transistor, but they usually fail with a short or open. It would be an unusual failure mode to produce low output. Replacement is a BUT70W type.

 

[billforbush]

The output voltage should be 32 VAC, measured across the blue and brown speaker wires. Try checking it again with both speakers disconnected.

It might be a bad output transistor, but they usually fail with a short or open. It would be an unusual failure mode to produce low output. Replacement is a BUT70W type.

Thank you. Will do