Inductor Circlotron

[EUVL]

Good to hear from you after a long while.
Though, the argument for the circuit in post #1 is that only a single non-floating power supply is required.
In the design you just posted, one still needs 2 floating PSU.

Not that that in itself bothers me.




Patrick

[Circlomanen]

With Ixys depleationmode-fets you could build this one.
But as you said, two powersupplies are needed.



The simplest fully balanced supersymetrical pushpull one stage-amp i can imagine. With big batteries as powersupplies no capacitors are needed at all anywhere in the amp.

[carpenter]

Thanks, I'll study and sim them in my spare time.

[Kashmire]

I've beat Zen inductor amps to death ... Choke Loads for Zen/Aleph Amps

I ended up with toroidal 120mH 2.5A Amveco inductors. Since then, I run a source-follower output stage with an Aleph CCS.

Inductor amps still fascinate me, mostly because of the energy efficiency, but I've never maintained one in my system long-term.

[carpenter]

I'm afraid that inductor amps are all that thrill me. I, too, appreciate the enhanced efficiency. My most recent inductor, balanced, cascoded, follower is wonderful to listen to. It seems to have extra spring in the music, more life like. For a fellow that's hard of hearing, that bit of liveliness is hard to beat. Now, my wife, the golden ears, thinks the amp sounds excellent and is rather displeased that I've sold it. I told her I'll build us another very soon.

[Tyimo]

Hi Johannes!

The inductor is a bifilare winded big E-core transformer with about 2 x 150 turns of 2,5 mm2 isolated coppercable.

How much DCR has your big Choke?
How many Voltages did you set the Vgs for biasing?

Greets:

Tyimo

[Circlomanen]

0,6 ohm DCR. I dont know the voltage on the gate of the mosfets. I made it variable and set it to whatever voltage necessary to get 500 mA running through each fet. One ampere should be better.
Two amperes even better than that.

[Tyimo]

Thanks!

Tyimo