[sdiy] slightly OT: current demands for 12ax7a & 12au7?

anthony aankrom at bluemarble.net
Fri Apr 28 02:15:08 CEST 2006


>
>> I'm building a small el84 based tube amp with reverb. It's the high 
>> octane AX84 design actually. The power supply calls for a 6AC4 or an 
>> EZ80/81. I have a 6X4 and a 6AX5GT. Now I know the 6AX5GT can handle way
>
> I went with solid state rectifier. The only effect a tube rectifier has 
> for a class A amp is some constant voltage drop. There will be no sag.

I had thought of that. The main reason I thought I'd go with a tube 
rectifier is that my transformer is 360-0-360 and I have a 10H inductor that 
I was going to use for the filter instead of the 50uf cap. With this setup 
the voltage is exactly right for a Class A amp.





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