Article: Beast With a Thousand Jfets

[Nelson Pass]

I am happy to announce that the article

Beast With a Thousand Jfets is posted in the articles section at

FIRST WATT

😎

 

[EUVL]

Finally. 🙂

BTW, current asking price for 2SJ74 is 4€ a piece.
So just P-JFETs alone would be 2000€ ?

(That is of you can get them at that quantity at all......)


Patrick

 

[GentryBa]

THAT.... is really freaky! 😱 😀

congrats for such a project, mr. pass!

 

[Nelson Pass]

BTW, current asking price for 2SJ74 is 4€ a piece.
So just P-JFETs alone would be 2000€ ?

I read about power amplifiers that go for $100,000. What would you pay for
such an exotic beast?

Besides, Patrick, I have a photo of you holding one of the boards. You had
your chance to run away with it....

😎

 

[generg]

A dream of your youth came true creating the "beast", what a long line in your life and how happy the different turnings of the story.....

a great movie....

thank you! and your wife, turning dreams in a kind of real situation....ending (of course) in communication and the young man, fulfilling the monsters whishes...😀

 

[Vix]

Hi!

Since I have recently switched to another job, the last month or so had been quite freaky...Net result was the lack of time for forum or any audio activities...So tonight I decided to see what's going on here...

What a nice surprise! As always, thank you Mr. Pass! 😎

 

[dimkasta]

Finally. 🙂

BTW, current asking price for 2SJ74 is 4€ a piece.
So just P-JFETs alone would be 2000€ ?

(That is of you can get them at that quantity at all......)


Patrick

Roth tested the Idss of each Jfet and soldered them into the boards

So I guess some matching is also required, so that would be even more expensive 🙂

 

[WalterW]

Wow! Nice looking boards!

Who is starting the Builders Thread? hahaaha...

That's why it's so hard to get those JFets in The Netherlands, Mr. Pass bought them all 😀

 

[Bksabath]

Tanks Papa

Briliant

And Yes got the hint ( me worry about a not worthy one and possible intollerance to travel)
But ....

 

[Scottmoose]

Good grief. Great artistry Nelson. 🙂

 

[Nelson Pass]

So I guess some matching is also required, so that would be even more expensive 🙂

We graded them a little more finely so as to be sure of getting relatively equal
distributions, but actual matching was not necessary, so the cost is the same.

BTW, Patrick's estimate of the cost of the P fets was one channel only.

At $5 apiece, we have almost $12,000 worth of Jfets. I believe I pointed out
elsewhere that I left the leads on the parts long, just in case I needed them
someday.

😎

 

[Vix]

So when someday you need them, just taking them out; it will still work, just slightly worse, that is until enough have been taken out.. (I wonder why I am thinking about HAL....) 🙂

 

[Blues]

All right Mr. Pass...I'll make sure you get them back when you need 'em.

 

[EUVL]

> Besides, Patrick, I have a photo of you holding one of the boards. You had
your chance to run away with it....

I already sorted out my own solution.
No less freaky, I can assure you.
But somewhat less costly .....

🙂


Patrick

 

[MEGA_amp]

Group buy?.......lol

A bottle of red is headed your way......loooong overdue

-john

 

[oneplustwo]

So cool! Any chance you could do something similar with other jfets?

 

[Guiness]

Excellent article as usual... thank you for the late night reading.

 

[Mr. dB]

So are the boards going to be available at PassDIY, or in the DIYAudio Store? 🙂

 

[Vix]

Hm...smells like El-cheapo version of the Beast...with some cheap J-fets, a group buy would mean a quantity of 10000-50000 or more pieces. If one could get 2000 jfets for 200 bucks, then it becomes a viable option.... 😎

 

[Dzius]

Isn't it a great chance for producer ? We've got niche market here. It's probably better than The Long Tail theoryin economics. Maybe someone should let them know.