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Old 19th September 2002, 07:38 AM   #1
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Default Walt Jung Class A preamp

When I browsed the web I found a bipolar class A opamp design by Walt Jung the old opamp guru, has anybody tried this discrete opamp audio buffer I will search the schematics and post it when I found it.

The design is made up from very few parts and looks very good with low distorsion and so on.
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Old 19th September 2002, 07:48 AM   #2
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Default The Class A Preamp schematic

Here it is the Class A preamp schematic http://www.elecdesign.com/1998/oct0198/tt/1001tt.shtml
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Old 19th September 2002, 08:48 AM   #3
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This buffer design works as good as Mr Jung says. I have tried it myself.

You write "preamp" it's a buffer with gain of 1 if you didn't notice that.
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Old 19th September 2002, 08:55 AM   #4
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Default Buffer

Yes I noticed that but I will see any class A designs that is good for high end audio I have tried it in multisim and it works.

I think that the most good preamps buffers is jfet designs do you have any idéa of a bipolar simple high end line preamp and buffer
designs BTW I will buy a power supply pcb of your design.
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Old 19th September 2002, 09:09 AM   #5
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Have you seen Erno Borbelys monster FET designs?

http://www.borbelyaudio.com/
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Old 19th September 2002, 09:17 AM   #6
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Yes too much parts I think it should be very few parts in a high end preamp.

Like the JC-2 clone wich I have run for almost 15 years it is very good but it must be some better designs now.

I also like the low output impedance possibilities.
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Old 19th September 2002, 05:22 PM   #7
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You can try to click "www" button at the bottom of this thread, I have an Audio Buffer on my web page.
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Old 19th September 2002, 06:38 PM   #8
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Default Re: Walt Jung Class A preamp

I've built this buffer. It works very well; sounds good too. Iused different transistors and adjusted the bias currents a bit.
mlloyd1

Quote:
Originally posted by leiade
.... has anybody tried this discrete opamp audio buffer....
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Old 19th September 2002, 10:08 PM   #9
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Curl's JC-2 circuitry is still better than 95% of the
high end gear out there today.
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Old 19th September 2002, 10:13 PM   #10
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JC-2 schematic can be found here if anybody's interested.
http://marklev.com/marklev/JC2/jc2schematics.jpg
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