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Unknown head on CL
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Re: Unknown head on CL
Transistor amps aren't like tube amps. If you find that there is a bad transistor in there that is obsolete, you may or may not be able to get a direct replacement. If not, you may be out of luck unless you redesign part of the circuit.
I've found that some tremolo circuits in these old amps can be tricky to get working again. It's important for all the components be within a certain tolerance range in order for the oscillator to work. If a cap or resistor drifts out of spec, the circuit won't work.
The output transistors are direct coupled to the speaker, or are coupled through a capacitor. First thing to check is to see if there is any d.c. voltage at the output jack. If there is, you probably need to replace the coupling cap.
Good luck!
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