John Curl amp

MikeW · 27th August 2007, 08:43 PM

I would like to build an amp by John Curl. The only one I see is on the class-a amplifier site. I could do the board layout only if it is ok with John.

GRollins · 27th August 2007, 09:18 PM

www.marklev.com has schematics for the JC-3 and the ML-2. As I understand it, the JC-3 was the prototype and the ML-2 the (greatly fiddled-with) production version. I don't remember offhand who did the fiddling--Tom Colangelo, perhaps? It's been a while since I used those particular brain cells. In any event, the ML-2 is clearly a more complicated circuit than the JC-3, although if you squint your eyes just right you can see a resemblance.
I'm not aware of any other schematics by John being available, unless you want to count the JC-2, but that's a preamp.

Grey

john curl · 28th August 2007, 12:01 AM

It's OK with me. Once I publish, I expect it to be copied. However, upgrade all the active parts.

MikeW · 28th August 2007, 01:17 AM

Thanks
John, did you need any caps?
Grey, did you get the flood under control?

john curl · 28th August 2007, 02:35 PM

I have thousands of caps, it is just 'good' caps that I am short of. What kind of caps were you referring to?

MikeW · 28th August 2007, 03:20 PM

10000 uf 50volt panasonic 85 deg. One inch by 2 inch.
Extra power supply caps.

mpmarino · 28th August 2007, 04:54 PM

Interesting Mike,

Would you be interested in the ML or the JC variant?

lumanauw · 28th August 2007, 05:08 PM

Cello power amps, are these by JC too?

john curl · 28th August 2007, 05:15 PM

No, Cello is done by Tom C.

john curl · 28th August 2007, 05:16 PM

I might be interested, Mike. Part #? (I just need closer dimensions)

27th August 2007, 08:43 PM	#1
MikeW diyAudio Member Join Date: Sep 2002 Location: North of Boston	John Curl amp I would like to build an amp by John Curl. The only one I see is on the class-a amplifier site. I could do the board layout only if it is ok with John. __________________ MikeW

28th August 2007, 01:17 AM	#4
MikeW diyAudio Member Join Date: Sep 2002 Location: North of Boston	Thanks John, did you need any caps? Grey, did you get the flood under control? __________________ MikeW

28th August 2007, 03:20 PM	#6
MikeW diyAudio Member Join Date: Sep 2002 Location: North of Boston	10000 uf 50volt panasonic 85 deg. One inch by 2 inch. Extra power supply caps. __________________ MikeW

28th August 2007, 04:54 PM	#7
mpmarino diyAudio Member Join Date: Jun 2004 Location: Crunchville, where I don't fit in.	Interesting Mike, Would you be interested in the ML or the JC variant? __________________ Crazy Yankee.

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27th August 2007, 09:18 PM	#2
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	www.marklev.com has schematics for the JC-3 and the ML-2. As I understand it, the JC-3 was the prototype and the ML-2 the (greatly fiddled-with) production version. I don't remember offhand who did the fiddling--Tom Colangelo, perhaps? It's been a while since I used those particular brain cells. In any event, the ML-2 is clearly a more complicated circuit than the JC-3, although if you squint your eyes just right you can see a resemblance. I'm not aware of any other schematics by John being available, unless you want to count the JC-2, but that's a preamp. Grey

28th August 2007, 12:01 AM	#3
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	It's OK with me. Once I publish, I expect it to be copied. However, upgrade all the active parts.

28th August 2007, 02:35 PM	#5
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	I have thousands of caps, it is just 'good' caps that I am short of. What kind of caps were you referring to?

28th August 2007, 05:08 PM	#8
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	Cello power amps, are these by JC too?

28th August 2007, 05:15 PM	#9
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	No, Cello is done by Tom C.

28th August 2007, 05:16 PM	#10
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	I might be interested, Mike. Part #? (I just need closer dimensions)

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