John Curl Mc Kinnie phono pre-preamplifier - diyAudio
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Old 3rd May 2006, 12:37 PM   #1
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Default John Curl Mc Kinnie phono pre-preamplifier

I own a Michell Gyro turntable/Helius Orion/DL-103R connected to an ARC SP8 preamp through a John Curl Ro-3 Mc Kinnie pre-preamplifier.

Although my cartridge is providing a low output (0.29mv) I really need to reduce the total gain.

My John Curl pre-preamplifier is a second hand unit and I don't have the owner manual to modify the Gain with the internal 2-WAY DIP-switch provided.

I really would appreciate it very much if I could receive some advise on that.

Regards.

Antoni
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Old 25th July 2008, 08:09 AM   #2
dowser is offline dowser  Switzerland
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Very late response - but I have a manual for one of the RO III pre-pre's. Supposedly there were a few variations of the circuit, I ended up sending montana-audio.ch some internal pictures and they sent me the right manual in electronic format. PM me if this is still a requirement s for you.

I found this post trying to find the connection between John Curl and this pre-pre - do you have any background?

Thanks, Richard
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Old 25th July 2008, 10:26 AM   #3
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Why not email the Ro3-JC manual to ACD ?

Jan (ACD) can place it on the schematic section of his homepage, accessable to everyone who's interested.
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File Type: jpg ro-iii phono.jpg (31.0 KB, 710 views)
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Old 25th July 2008, 11:13 AM   #4
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Yes please email it to me, and I'll upload it a.s.a.p.
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Old 25th July 2008, 11:14 AM   #5
dowser is offline dowser  Switzerland
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You have email

Richard
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Old 25th July 2008, 11:35 AM   #6
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Did you email it to Antoni or me ?
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Old 25th July 2008, 11:43 AM   #7
dowser is offline dowser  Switzerland
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Both - it was 2MB in size, sent at 12:14 UK time.
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Old 25th July 2008, 12:15 PM   #8
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Thanks Richard,

The file is available here:
http://www.audio-circuit.dk/Schemati...III_Manual.pdf
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Old 25th July 2008, 12:40 PM   #9
dowser is offline dowser  Switzerland
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Thanks - I sent the other one too, but I'm not sure my gateway will let it out.

Richard
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Old 25th July 2008, 12:42 PM   #10
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Yes that must be the problem, as I haven't received it......
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