2SK/irfp lateral vertical mosfet amplifier HELP ??

[bogdan_borko]

thanks for translation, but spite is closer to "prkos"...

MEDOGRIZLI, sorry, I was nervous.
You are new in this forum, so when you want something to learn: FIRST search the previous threads, becouse a lot of new members, ask the same questions again and again and that could be iritating sometime...

Cheers brother!

[medogrizli]

So pleae if you have GOOD pdf tutorual book about AB class amplifier design
So usualy books can not be fond on the net freely

or good web links: please send it here or email velikigrizli@gmail.com

thanks

[AndrewT]

Hi Med,
a change in attitude, well done.

Go and read ESP and Leach.
They are excellent sites.

[Sheldon]

Originally posted by Wavebourn


Why not?

I used IRF mosfets loaded by a BJT current sources, with a servo opamp, and powered it from a bipolar source. Nice single ended A class heater.
It scared me once, when a waterfall run on CD. I jumped and turned around, but fortunately found no water in the room.
It uses some IRFPs, I don't remember exactly. Tubes are 12J5 and 12L6 in triode connection, directly coupled through a voltage shift (bi-polar B+ source) and have a global feedback including DC. Also, I used TV compactrons in such design, sound well. However, every tube needs own current to work with minimal distortions. Instead of IRFPs I used IXFKs, the same good result.

Nearly any active element may be used with good results, if used properly.

That's an interesting design. Pretty simple. Good PSRR too? The tube running off the common power supply rails? You might get some interest posted on the tube forum.

Sheldon