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November 01, 2024, 10:13:06 PM

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Power amp in

Started by Miyagi_83, October 19, 2024, 11:36:12 AM

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g1

Looking again at the Regent, I see some stages have a resistor from the + supply to the output pin.  I'm not sure why they are doing this, it's not required with a split supply, ends up putting DC on the output pin which then requires a DC blocking cap.
I wonder if they translated the circuit from a single ended supply and didn't know what to do?   ???

Miyagi_83

Quote from: g1 on October 22, 2024, 07:46:42 PMI wonder if they translated the circuit from a single ended supply and didn't know what to do?  ???
So it's not only greenhorns that make basic mistakes :)
Thanks a lot for your help, g1 :tu:
Good night, Frau Blücher.

Miyagi_83

Here's a couple of shots of the amp's guts.
Good night, Frau Blücher.

Miyagi_83

And here's some more. There are 4 power transistors there, KD3773, which makes me think someone modified or repaired it.
Good night, Frau Blücher.