Amp with 2SJ56 / 2SK176

[Praudio]

Get 10 of each ,very well matched,would like to built a quality 200w power amp running at +/- 75vdc(get a lot of transfo and can for this voltage).Prefer if boards are allready available. Thank's

 

[Praudio]

Help

Any serious diagram for using my 2sj56/2sk176

 

[Vigier]

Hi,

these transistors ar VERY good. I've had one amplifier that used those, and is sounded GREAT (VERY fast: 492V/µs voor the full output power). It was a ALBS DacMos 100. (using 1 pair of them for each channel). Now I have 9 channels using IGBT's (GT20D101/GT20D201). But I still regret I sold the Albs..GRRRR

Maybe you can get a hand on these designs: The Albs DacMos 100, 200 of 300 (the first number is the output-power AND the count of 2SJ/2SK pairs). (btw: it's albs not alps!)

I've found their website... it's http://www.albs.de

The current series are de Dac-Mos 120/240/360, using the BUZ900 transistors. The old designs were much better. Maybe you can contact them?

example: The quad-mos 600 using 5 pairs a channel.

Grtz, Joris

 

[Vigier]

By the way...if you can't find a decent circuit, you can always send them to me!!!

Grtz, Joris

 

[325addict]

good amp with 2SJ56/2SK176

Hi,

I know a good schematic using these MOSFETs.

The Australian Monitor PA1200 or 1K2 do use 8 (2X 4) of them per channel.

It has a rail voltage of 2X 90V and an even higher driver stage voltage.

It will effortless deliver 2X 600 Watts of RMS power....

 

[cyclecamper]

A lot of the Soundcraftsmen amps used them. Plenty of schematics available. But they're not class-A or anything. My PR1800 / 900X2 Soundcraftsmen amps use 12 outputs per channel. They're big-brothers to the Soundcraftsmen shoebox amps, which usually used the same FET transistors.

 

[Samuel Jayaraj]

Use them in Randy Slone's OPTIMOS amp and you won't regret.

 

[cyclecamper]

Just the 120 matched TO-3 ASJ156/2sk176 FETs in my 5 commercial amps are worth 3 times as much as the working amps are worth used. Weird.

 

[bear]

Borbely used these devices too, worth considering...

_-_-

 

[VladimirK]

This schematics had very good references about its sound

 

[aparatusonitus]

This schematics had very good references about its sound

Sure, with the Yamaha 2SK77 output transistors...do you know the type of other fets in that circuit?

 

[VladimirK]

Sure, with the Yamaha 2SK77 output transistors...do you know the type of other fets in that circuit?

Unfortunately, no, I also wonder, which p-channel jFETs could be used in the second stage.

 

[aparatusonitus]

P-channel fets used in the VAS could also be SIT-transistors, e.g. NEC 2SJ19 or similar from Yamaha...that will be really interesting.

 

[ckwong99]

Hi Sir,

Not sure you can sale 4 pairs for me ? I am goind on Goldmund power AMP project.

If so, how much per pair ?

Actaully, I have run 6 x pairs / ch in my Pass A75 and the sound good enough.