Walt Jung Class A preamp

leiade · 19th September 2002, 07:38 AM

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.

leiade · 19th September 2002, 07:48 AM

Here it is the Class A preamp schematic http://www.elecdesign.com/1998/oct0198/tt/1001tt.shtml

peranders · 19th September 2002, 08:48 AM

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.

leiade · 19th September 2002, 08:55 AM

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.

peranders · 19th September 2002, 09:09 AM

Have you seen Erno Borbelys monster FET designs?

http://www.borbelyaudio.com/

leiade · 19th September 2002, 09:17 AM

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.

PMA · 19th September 2002, 05:22 PM

You can try to click "www" button at the bottom of this thread, I have an Audio Buffer on my web page.

mlloyd1 · 19th September 2002, 06:38 PM

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....

Nelson Pass · 19th September 2002, 10:08 PM

Curl's JC-2 circuitry is still better than 95% of the
high end gear out there today.

Peter Daniel · 19th September 2002, 10:13 PM

JC-2 schematic can be found here if anybody's interested.
http://marklev.com/marklev/JC2/jc2schematics.jpg

19th September 2002, 07:38 AM	#1
leiade Account Disabled Join Date: Sep 2002	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.

19th September 2002, 07:48 AM	#2
leiade Account Disabled Join Date: Sep 2002	The Class A Preamp schematic Here it is the Class A preamp schematic http://www.elecdesign.com/1998/oct0198/tt/1001tt.shtml

19th September 2002, 08:48 AM	#3
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	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. __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread

19th September 2002, 08:55 AM	#4
leiade Account Disabled Join Date: Sep 2002	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.

19th September 2002, 09:09 AM	#5
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Have you seen Erno Borbelys monster FET designs? http://www.borbelyaudio.com/ __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread


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19th September 2002, 09:17 AM	#6
leiade Account Disabled Join Date: Sep 2002	Erno amps 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.

19th September 2002, 05:22 PM	#7
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	You can try to click "www" button at the bottom of this thread, I have an Audio Buffer on my web page.

19th September 2002, 10:08 PM	#9
Nelson Pass The one and only Join Date: Mar 2001	Curl's JC-2 circuitry is still better than 95% of the high end gear out there today.

19th September 2002, 10:13 PM	#10
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	JC-2 schematic can be found here if anybody's interested. http://marklev.com/marklev/JC2/jc2schematics.jpg __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

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