Hi Don,
I pulled the board and tested with sig gen on input and only the scope on the output.? Same huge crossover distortion.? The
(simple) circuit looked OK and the + input bias was 1/2 Vcc.? That chip is going to the waste bin!
Have hundreds of 741 devices in the junque box.? Used one - Works great.
The output is terminated into the high side of a 1K pot.? The wiper feeds an old TBA-810 circuit for several watts (if I want it ;) of output audio.
Woody ?? KZ4AK
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On 11/29/2018 18:21, Don, ND6T via Groups.Io wrote:
Try a 1458 instead. It has the same pin-out and is drop-in compatible with a much higher output capacity. I mention this since it appears that you are feeding a lower impedance than what it is capable of driving since that is the waveform that one would expect if doing so. What are you driving? I substituted an LM380 as an output AF amp in the V4 and it does very well. No pre-amp needed.
73, Don
