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Old 21st October 2006, 07:54 AM   #1
Tyimo is offline Tyimo  Hungary
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Default Nishiki hybrid amp

Hi!

Is there anybody who knows or built the Nishiki amp??
The designer is Wim de Haan and the design was published in the September 2006 issue of AudioXpress.

More infos are in:

http://www.wdehaan.demon.nl/hybrid/nishiki/index.html


Greets:

Tyimo
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Old 21st October 2006, 10:03 AM   #2
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I have the output boards and have been sitting on them for a while. I was planning to use the Aikido for the front end for it.
Haven't had much time to do anything with them.
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Old 21st October 2006, 11:41 AM   #3
Tyimo is offline Tyimo  Hungary
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Hi!

I would like to know how this amp sounds??

Tyimo
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Old 31st October 2006, 04:11 PM   #4
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Any news about it ?
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Old 31st October 2006, 04:23 PM   #5
Tyimo is offline Tyimo  Hungary
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Hi Teodoro!

Quote:
Any news about it ?
Not yet! Nobody knows this amp....
If I could get some positive info about the sound quality I would build it.

Greets:

Tyimo
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Old 31st October 2006, 07:50 PM   #6
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It would be not so difficult to simulate it ... the problem is that the components values are hidden.
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Old 31st October 2006, 08:30 PM   #7
lineup is offline lineup  Sweden
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Default Re: Nishiki hybrid amp

Quote:
Originally posted by Tyimo

Is there anybody who knows or built the Nishiki amp??
The designer is Wim de Haan and the design was published in the September 2006 issue of AudioXpress.

More infos are in:
http://www.wdehaan.demon.nl/hybrid/nishiki/index.html
I am a subscriber to Elektor electronics magazine since 17 years.
And I have saved each issue. Have several 100 magazines full with electronics projects and schematics.

Some 10-15 years ago, was published such a HYBRID.
Tube voltage amp + Push-Pull Lateral MOSFET power buffer follower.

Push pull complementary MOSFET pair was working in Class AB.
No drivers, only the two mosfets!
And a usual VBE multiplier to set the idle currents in MOSFETS.
Like 100 mA, if I remember correctly.
VBE Multiplier and the GATES were fead by CCS, constant current sources.
---------------------

The coupling, from tube output to MOSFET Vbe-multiplier,
used two Film Caps.
One from tube to positive MOSFET, N-Channel Gate
and one from tube to negative MOSFET, P-Channel Gate.

---------------------

Supply was a bit lower voltage, than usual for tube. Like 100 volts maybe.
Think the tubes used were called PCC88 or PCC86 or something like that.

MOSFET supply was dual and so output could be adjusted for zero DC-offset.

---------------------

I could find that old Elektor article and take a close-up photo of the schematic.
If anybody is interested.


lineup
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Old 31st October 2006, 09:47 PM   #8
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Yes, please.
Thanks
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Old 1st November 2006, 05:53 AM   #9
Tyimo is offline Tyimo  Hungary
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Hi Lineup!

Quote:
If anybody is interested
Me too please!

Tyimo
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Old 1st November 2006, 05:56 AM   #10
Tyimo is offline Tyimo  Hungary
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Hi Teodoro!

Quote:
It would be not so difficult to simulate it ... the problem is that the components values are hidden
No, it is not problem! If you write to the designer Wim de Haan, he will send you the complet schematic.
He is a very kind man.

Tyimo
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