Another CEM3340 problem post

Are you looking at it with a scope? Or just listening for it?

It’s unlikely you fried the 3340 unless you misconnected power to it. If it’s not fried I think it’s pretty hard to get a 3340 not to oscillate if you’ve given it power. Maybe in a completely wrong frequency range in which case you might have trouble hearing it.

Or the problem could be downstream of the 3340. A problem with the TL072 could block both waveform outputs. If you don’t have a scope you can try listening to the output pins on the 3340 using an audio probe.

From what I see the resistors look to be the right values (the 1.5M is partly hidden but I guess it’s right). The film cap is correct, the ceramic I can’t tell, it should say 102 on it. (Film would be better for that cap but ceramic should function well enough.)

You have strip cuts on between the two sides of each chip on every strip?

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