Beast with a Thousand JFETs

[Melon Head]

Hi Nelsom
I don't know if you mentioned it elsewhere or not. Is this going to be a single gain stage design?

 

[tiefbassuebertr]

"Beast with a Thousand JFETs" as integrated circuit in the outline of Sanken's 2SC2922 or in the outline of TO-3 - what about this?
The question is, from which value of pieces the costs therefore acceptable.
I have heard about Zetex (now "DIODES") and low costs by retatively low pieces of custom made IC's, but I don't know exactly.
Here is the weblink:
Diodes Incorporated

 

[Nelson Pass]

Hi Nelsom
I don't know if you mentioned it elsewhere or not. Is this going to be a single gain stage design?

I believe I will have some sort of front end for it, something
with a little voltage gain.

 

[Melon Head]

I believe I will have some sort of front end for it, something
with a little voltage gain.

Does that mean it will be something like an F4 with voltage gain provided by the preamp, or are you saying it will have voltage gain on the amp?

 

[Nelson Pass]

It will have voltage gain. The board you saw was simply
a follower output stage, and will be driven by a voltage
gain stage.

 

[iko]

Is it alive yet?

 

[Nelson Pass]

It's a very time consuming project.

 

[zhoufang]

Any progress in the new year?

 

[Zero Cool]

I'll let you know when I finish the 2nd channel.

You know this raises a good point i have often contemplated. lets say your building a new amp design. do you build a stereo amp/pair or build one. listen to it in mono, make adjustments, modifications then when finalized build the 2nd channel to match??

(sorry to hijack the thread)

 

[tiefbassuebertr]

B & K 501A FET transistor curve tracer

By chance I have found this:

B & K 501A mint FET transistor curve tracer, for Osh Russia - JPCTRADE X Yahoo! Auction
perhaps helpful for this project and some others, where selecting is necessary.
Owner's Manual therefore:
http://www.tech-systems-labs.com/other-kits/bk501.pdf

 

[Nelson Pass]

do you build a stereo amp/pair or build one. listen to it in mono, make adjustments, modifications then when finalized build the 2nd channel to match??

I always work with 2 channels.

 

[Zen Mod]

I always work with 2 channels.

that means that beast isn't real beast - just 500 jfets/ch

sissy amp






( ok - I know that from first post - 588 of them ..... )

 

[Nelson Pass]

Since it's simply an exercise in scale, I already know quite a
bit about the sound. The board in the photo can be 2 channels,
one channel, or half a channel. I have 5 boards.

 

[Zen Mod]

bad Papa ..... baaad !

again smarter than ZM

 

[Vix]

It can also be 5.1

 

[EUVL]

> Since it's simply an exercise in scale, I already know quite a bit about the sound.

Meaning you already have one working ?

Regards,
Patrick

 

[Nelson Pass]

Yes, I do.

 

[Magura]

So, spill the beans will you?

Quite a few of us are on the edge of our seats.


Magura

 

[Zen Mod]

naah - not me ;

I'll make beast with thousand EAA91

 

[Nelson Pass]

So, spill the beans will you?

All in good time. Like Julian Schwinger, I like to present the
edifice after all the scaffolding is removed. This reinforces my
reputation as a miracle worker.