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Old 27th August 2002, 04:18 PM   #1
DJG is offline DJG
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Question Pure Class A amplifier with FET - schematic wanted

Hello!

This is my first post on diyaudio and I am looking for a Pure class A amplifier with Mosfet. I have searched in slovenia, but no luck.

This amp should be about 100-140W / 8Ohm

And it has to be with mosfets!


If any of you has an schematic or PCB, could it be posted here? Please?


thx,
DJG
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Old 27th August 2002, 04:28 PM   #2
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http://web.vip.hr/pcb-design.vip/
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Old 27th August 2002, 10:17 PM   #3
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Try an Aleph 2, documented at www.passlabs.com
and elswhere on this forum.
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Old 27th August 2002, 10:38 PM   #4
skaara is offline skaara  Slovenia
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Jao kje si mona:P
Check the passlabs section of this forum..
btw,
U should use the search function for this questionD
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Old 28th August 2002, 04:49 AM   #5
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Default My old 1R1 Mosfet design

For something challenging and somewhat complex, but with excellent sound quality look at the link below. It is has a fully class “A” output stage and is also a good foot warmer.

I designed this back in back in 1992 or so. My newer versions of this use a similar circuit arrangement. This project is perhaps a lot more complex than most DIY’er care for.

http://www.audioamps.com/diyprojects...ps/1r1/1r1.htm


John Fassotte
Alaskan Audio
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Old 28th August 2002, 01:17 PM   #6
DJG is offline DJG
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Now, that is a complexed amp!
Those Aleph are really good, I shall choose eno of those - if anyone has any more schematic of A class Mosfet amplifier... Pretty please!

thx,
DJG
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Old 1st September 2002, 10:46 AM   #7
DJG is offline DJG
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Hello!

I have a question about these Aleph's.
How do I wire the inpit signal, because there are XLR +/- and RCA U.
This might be a dummy question, but what do they mean?

I just want to give in a normal signal, over chinch connectors.

thx,
DJG
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Old 1st September 2002, 12:18 PM   #8
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The RCA in is the regular everyday connector. Not sure what you mean by chinch connector.
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Old 1st September 2002, 12:21 PM   #9
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Quote:
Originally posted by DJG
Mosfet's rule in any respect
Power - yes,
easy of use - yes
linearity - no

That's what most purists will say including the much respected Rod Elliot.
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Old 1st September 2002, 12:52 PM   #10
DJG is offline DJG
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Quote:
Originally posted by annex666


Power - yes,
easy of use - yes
linearity - no

That's what most purists will say including the much respected Rod Elliot.
What do you mean - not linear?
Aren't Mosfet's the most linear elements?!

So, RCA is that connector, which I should connect with the signal(250mV)?
What about XLR?

thx,
DJG
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