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Old 10th April 2021, 10:05 PM   #961
90scaraudio is offline 90scaraudio  United States
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Join Date: Aug 2012
Location: ILLINOIS
LJM mentions it's OK to use less then +-60v rails and I've got an Onkyo adm21 that I was thinking on using the chassis, heatsink, and transformer. The transformer has 43-0-43, 33-0-33 (not used), 18-0-18, and 5vac. The schematic for this amp shows +-57.8 rails and it uses 2sc5200, 2sa1943 (just one of each for each channel.
Is the L20SE going to live with this much rail voltage?
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Old 14th April 2021, 08:46 PM   #962
Wieslaw Lipowski is offline Wieslaw Lipowski
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Join Date: Jun 2019
Default L15D, L20D, L25D

I'd like to ask whether the CP1 22uF input capacitor is a part od the negative feedback circuit in those amps?

If the answer is yes, CP1 can't be shorted even if there is no Vdc at the input.

I think the answer is YES.
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