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I want 40 volts for a power amplifire. How much should be my transformator?

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I want 40 volts for a power amplifire. How much should be my transformator?

Hi,

I want 40 volts for a power amplifire. How much should be my transformator?

Is 2*24 enough?
asked Jun 17, 2013 by arm (230 points)

1 Answer

+1 vote

24VAC connected to a bridge rectifier with an input filter capacitor may be a little low in voltage--28VAC may be better.  Note that the regulation of such transformers is relatively poor so the voltage at no load will float to the peak of the sine wave + 15% or so.  For the VA rating, make it at least four times the audio power output--so if if it is a 10W amplifier, use a 40VA transformer.
answered Jun 21, 2013 by j-keith (12,800 points)

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