Quote:
Originally Posted by Al (astral highway)
Oops. My bad- you mention 21VDC, Jolly. These various voltages began to confuse me.
However that’s an off-load figure with your 12V xformer outputting 16VAC.
I think you’ll get about 15.5VDC after the bridge and smoothing capacitor under load, which could give you regulated max 12V DC output.
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No worries.
Actually I do read 18V DC on my multimeter and it comfortably powers up my Hacker Sovereign II too. So, as it serves my purpose, I am happy the way it is.
You were absolutely right saying that replacing the amplifier circuit wouldn't make any difference. I made a TDA2822M based circuit, powered from AC with a 21V to 5V stepdown converter, and took out the old board, but the noise persisisted. I'll now be looking at modifying the circuit as per Dave's diagram in post #40.