A new design for a class A amplifier

260

02:58:00

Try to build this in real life and tell me if it works. And good luck! The amp will stay in class A mode until the input voltage goes above  750mv in 8ohm load. The amplifier's idle current shoud be around 1.5Amps per rail. And be careful and use big powerful output transistors (150W TO-264,TO-3pl,TO-3 package). And the class A driver with the 15pf capacitor will need a heatsink. On the power supply of things use 2x 10 000uf capacitors each per rail and put small ceramic caps in parallel with every diode on the rectifier and in parallel with the 10mf caps. Btw im 15 and on 24 jan i'm turning 16 wish me luck cuz for my bday i'm going to buld this. And if this design doesn't work try building Rod Elliott's P3A and bias it into class A i tried but it didn't work. You are the judge with or without a half current mirror.

published 10 years ago

GingerKing

10 years ago

Cool. It doesn't look efficient but overall it looks pretty good. Good luck on building it

AmplifierFAN

10 years ago

Thanks! O you can bias it trough the 10k resistors of the biasing transistors that are connected to the emitters of the outputs

GingerKing

10 years ago

Yeah changing the 10k to a 2k, and the 1k to a 140 looks nice on the simulation

Lucan01

10 years ago

You are 15 and going to do this... Jeez, you're already getting there to join our boat! That's great! :)

Lucan01

10 years ago

I am more than curious enough if you Casually made this... post the pictures!

AmplifierFAN

10 years ago

How and where?

Issacsutt

10 years ago

What's the purpose of this circuit; what's it supposed to do? (I'm sure there's plenty of different applications for it), but what do you plan on using it for???

AmplifierFAN

10 years ago

An class A amp for my speakers. But i think there is no need because i tryed p3a in class A and it sounded the same as class AB so i don't know if there is any need for a class A.

Issacsutt

10 years ago

Oh ok , then try using lots of transistors, and filter with many capacitors for better quality

AmplifierFAN

10 years ago

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