Nahash5150

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Welcome to the site @fev1969! It's not possible to get carried away here so rock on.

And there is a tradition here - if you don't choose a profile picture - we'll pick one for you.

Welcome Gary! Great to see you here!

I'd like to put this out there: I see nothing for a Phase Linear A30.

What are you talking about? I have been giving advice and helping out however I can. I haven't said anything about you or your motives. Timmyjim is entitled to his opinion in an open forum so if you don't think he's worth listening to then just block him and carry on. Sheesh.

The Carver C-1000 is a very nice unit. Unfortunately, I don't know enough about it to give it a full review. I have one here that a client wants to sell, but out of fear I haven't been using it...maybe I should...

Actually you are correct.

Nice 12V regulator design from 1980 M1.5 If the 2200uF cap is hot, then it's more like a resistor than a capacitor, so I imagine you'd be seeing more of a rectified waveform than a DC approximation.

If you doubled the capacitance, then you increased the in-rush current. This is probably okay, but I imagine that would cause some transformer groaning. So am I to understand that the buzzing is heard from the speakers for 30 seconds then it goes away? If that is the case, it's probably the DTC malfunctioning. Put your DC meter on an output transistor collector and tell me what the voltage is when it starts up, then after 30 seconds. There will be a PNP (MJL1302) and a NPN (MJL3281). Measure both.