Article - Sony VFETs part 1

[vdi_nenna]

PapaSits ...... certainly , but I'm doubting that he collected ancient ones enough for trouble-free production

By using the rare SITs, the article(s) will be educational for something else down the line, like the Nemisis and Pass-1 SIT, semisouth, etc. That's my guess.

 

[Zen Mod]

according to announcement , we will get that

I was speaking about regular FW product , which is going to fill M2 place

 

[Soundhappy]

@ Diyers
Upcoming article have lots options
we can build 4 differents mono amplifiers with:

1| simple pair of vfets
2| two pairs matched vfets
3| simple pair of depletion complementarys
4| two pairs of matched depletions complementarys

+| with 4 matched vfet´s pairs for mono maybe ??

I smile about fun choice of candidates not vfets as well for Mr Pass topologys.
Best regards

 

[CeeVee]

PapaSits ...... certainly , but I'm doubting that he collected ancient ones enough for trouble-free production

...I was thinking of Papa SITS....

 

[Soundhappy]

NP has to do something fantastic with all the SITs he has....

FIRST WATT S1

First Watt SIT-1 Mono Power Amplifiers Review | A Unique Audiophile Experience

Done but with Mr Pass we can have new last discovering.
Stay in tune....
Kind regards

 

[Nelson Pass]

Part 2 is nearing completion. It is a mini version of the VFET amps that Sony
has been using at shows.

It can be built with 1 pair of 2SK82, 2SJ28 per channel or 2 matched pairs,
so you may want to get some of the last of these out of Acronman while
you can.

 

[dady]

Welcome Mr. Pass

 

[dady]

I just got two more pairs.
Best Regards to the gentlemen of this venerable thread.

 

[Michael Rothacher]

https://www.youtube.com/watch?v=D88HMQF8W_4

 

[Soundhappy]

Part 2 is nearing completion. It is a mini version of the VFET amps that Sony has been using at shows.

Party time Vfet amplifier
Huge THANKS Mr PASS the one and only DiyAudio PAPA.
My heart beats faster
Kind regards

 

[WalterW]

Soundhappy, thanks for the picture of the SIT amp
But seeing this I have some questions:

 

[Soundhappy]

But seeing this I have some questions:

@ WalterW

?


I belive they we have photo of prototype for demonstrations ?

 

[Zen Mod]

that component is thermal fuse , I believe 70C

just in case if you forgot your pillow on amp ....... or if your cats are happy sleeping on it, just as mine are

regarding cap question - clarify ;

you want FW SIT1 sch , in public ?

 

[woody]

Zen long ago I had a class AB amp that took about 2 hours to really warm up and sound good. But I could throw a blanket over it for about 1/2 hour instead !

 

[llwhtt]

I think Soundhappy is referring to the big loops of green and blue wire.

Craig

 

[dady]

The circuito es fácil, so inefficient Mr Sound. Avoid to use it on Europe, we are conservationist.

 

[Soundhappy]

I think Soundhappy is referring to the big loops of green and blue wire.

Craig

The guy who ask questions are WalterW
One possible response are :
This longer loop wire are nice if after 20 years someone
must change old capacitor ,
easy solution to manipulate pcb if need.
Less work with desolder.
Smart FW

 

[Nelson Pass]

Yes. I like to have a little slack when I have to get to the underside of the board.

 

[damuffin]

Jeeeezzzz, Its the 29th and I'm starting to chew on my limbs from all the anticipation for Part II.

 

[Dennis Hui]

Jeeeezzzz, Its the 29th and I'm starting to chew on my limbs from all the anticipation for Part II.

Before any more damage is done, please enjoy the weather, find a patio and grab a pint.

Dennis