Simplistic Mosfet HV Shunt Regs

[Salas]

Originally Posted by pidesd

how easy would it be to create a dual-rail version of this design? one could benefit from it in a electrostatic amp for instance, no?

I would mirror it for you guys but I have no symmetric HV gear to test it. Sorry.

[pidesd]

that would be nice if you could post a schematic! i dont know how many would like a board for such a supply...but maybe enough people would like it to say the day so that a group buy can be organized. we never know.

any reason why it wouldnt work well?

[dggs]

Originally Posted by Salas

I would mirror it for you guys but I have no symmetric HV gear to test it. Sorry.

Please generate one if it's not too much trouble for you.

[Salas]

Originally Posted by pidesd

that would be nice if you could post a schematic! i dont know how many would like a board for such a supply...but maybe enough people would like it to say the day so that a group buy can be organized. we never know.

any reason why it wouldnt work well?

Originally Posted by dggs

Please generate one if it's not too much trouble for you.

Don't know what it might go wrong guys if I don't have an application to really test it on.

[regal]

Trying to figure out how to calculate the heat dissapation on the IRF840. I understand its Vout*iccsmA*X, what is X ?

Thanks

[massimo]

Vout * Iccs whith no load
Vout * (Icss - I drawn by the load) when loaded

[regal]

Originally Posted by massimo

Vout * Iccs whith no load
Vout * (Icss - I drawn by the load) when loaded

I know that equation is on the first page but, the confusing thing is that quanghao's schematic shows i840= 0.2 Iccs, other posts have indicated this as well.

[Salas]

What Massimo said.

[regal]

Originally Posted by Salas

What Massimo said.

10-4 and thanks.


Where do you guys buy these big 15W+ heat sinks? I can't find anything at digikey. Would like to buy a thick 3" finned strip that I could cut to size to fit in a typical tube amp chassis. My understanding is you want this shunt regulator in the same chassis as the tubes to keep the B+ wire short as possible.


This shunt reg I think will turn the headphone SET amp world upside down with a simple 6c45pi spud amp+OPT. Basically no electrolytics in the signal path anywhere. Exciting stuff. I love the way Salas brings new technology to improve ancient but wonderful designs.

[massimo]

Originally Posted by regal

I love the way Salas brings new technology to improve ancient but wonderful designs.

we too