KSC2690A and KSA1220A

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Checked and tested the NTE373 and 374 but they behave badly in step and square.

At voltage, at what current, and at what frequency do you test this? What was the load in terms of R/L/C? Did you swap a different transistor and see much better behavior? If so, what was that transistor?

This is the kind of test that I could replicate and capture screen shots.
 
At voltage, at what current, and at what frequency do you test this? What was the load in terms of R/L/C? Did you swap a different transistor and see much better behavior? If so, what was that transistor?

This is the kind of test that I could replicate and capture screen shots.

Replaced output signal generator. Checked scope. Replaced with 2sc1220a big difference
 

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