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RE: Sony VFET set

75.155.205.186

BenM

In Reply to: RE: WEll, posted by vinnie2 on August 29, 2017 at 18:26:32

Sony VFET SET - best of both worlds. Diyable, but VFETs are now in short supply.

Example here:

Build with light bulb resistance load, resistor load, or choke (Hammond 193V) load.

http://www.diyaudio.com/forums/pass-labs/201655-lamp-simple- (Open in New Window)

Follow Ups:

I think Nelson Pass wrote somewhere - Lew 21:17:49 08/30/17 (1)
that he cornered the market on VFETs or some other SS device that closely mimics a VFET. Anyway, he has them, so far as I recall.
- RE: I think Nelson Pass wrote somewhere - BenM 22:14:54 08/30/17 (0)
  He bought a lot of Sony VFETs but he did not have enough for commercial production. He then had a now defunct company SemiSouth make a batch of SITs (static induction transistor - also known as VFET or vertical field effect transistor) at a price of $300,000 which he uses in his First Watt SIT amps.
  
  He designed a VFET push-pull amp and in collaboration with DIYAudio, made available his Sony VFETs in a diy kit for diyers (I have one). Apparently he has a single ended design that will also be made available in kit form to diyers soon too.

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