Class A Amplifier

321

04:21:16

Close the switch on the right first, and two second after - close the other switch. Wait 10 seconds until amp falls into regime. 

Vin - 3.85Vm 
Av - 5.7
Pout - 60W
Pcc - 212W
η - 28%
Δf - 13Hz - 50kHz @ - 3dB
PSRR - - 60dB. Could be better if the zener regulation is replaced with an LM317 regulator.
THD - 0.007%

published 8 years ago

ViolationMad

8 years ago

If think the gain is too high or the q point is a little bit of.

Mayck

8 years ago

60w class A amplifier? It will generate a lot of heat

thebugger

8 years ago

The bias is correct. Just give it a few seconds to normalise. P.S. Yes it'll generate a lot of heat, but I have a way of dissipating it, so it's not really an issue for me

WTFCircuit

8 years ago

Wasn't the maximum theoretical efficiency 25% for class A amplifiers? How did you get 28%?

thebugger

8 years ago

The maximum theoritical peak efficiency is 30%, but the average efficiency can be as low as 5-6%. Transformer coupled class A amps take it up a notch to 50% ideally, but these maximum values can never be reached.

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