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Old 27th August 2003, 02:03 AM   #1
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Default Amp with 2SJ56 / 2SK176

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
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Old 17th September 2003, 01:36 AM   #2
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Any serious diagram for using my 2sj56/2sk176
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Old 17th September 2003, 07:01 AM   #3
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Hi,

these transistors ar VERY good. I've had one amplifier that used those, and is sounded GREAT (VERY fast: 492V/s 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.
Click the image to open in full size.

Grtz, Joris
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Old 17th September 2003, 07:03 AM   #4
Vigier is offline Vigier  Netherlands
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By the way...if you can't find a decent circuit, you can always send them to me!!!

Grtz, Joris
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Old 28th June 2011, 06:06 PM   #5
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Default 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....
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Old 10th July 2011, 04:07 AM   #6
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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.
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Old 10th July 2011, 07:22 PM   #7
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Use them in Randy Slone's OPTIMOS amp and you won't regret.
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Old 10th July 2011, 10:44 PM   #8
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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.
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Old 11th July 2011, 03:51 AM   #9
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Borbely used these devices too, worth considering...

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Old 11th July 2011, 05:09 AM   #10
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This schematics had very good references about its sound
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