Depletion mosfet

[pyrohaz1]

Hey guys, Im currently researching into depletion mosfets I was wondering if anyone can tell me where I can get some high(er) power mosfets from, im currently using DN2540's I got off ebay. I have spice'd an amplifier (about 9w), it is only a simple one with no NFB and runs off 60v. I will include a screen shot of it. It only has about 360mA on each of the mosfets and a bias voltage of ~1.4v (Cathode voltage). For the phase splitter, I used a simple 2N7000 Cathodyne (Sourceodyne in this case? )

Tips and help please cheers!

View attachment 41309

 

[hotwaterwizard2]

Mouser has a great selection

DN2540  DN2540N5-G

Here is the Datasheet
http://www.supertex.com/pdf/datasheets/DN2540.pdf


N-Channel Depletion-Mode Vertical DMOS FETs

http://www.mouser.com/catalog/637/526.pdf

http://www.mouser.com/ProductDetail/Supertex/DN2540N5-G/?qs=sGAEpiMZZMutXGli8Ay4kB0LeIPGp6S4VnggXtNEsEk%3d

 

[Hero999]

Why build a very inefficient class A amplifier when you can make an efficient class AB ampflieir which sounds as good?

The only real use for a depletion power MOSFET is a normally open solid state relay.