John Curl Mc Kinnie phono pre-preamplifier

Antoni Rende · 3rd May 2006, 12:37 PM

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

dowser · 25th July 2008, 08:09 AM

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

jacco vermeulen · 25th July 2008, 10:26 AM

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.

Jan Dupont · 25th July 2008, 11:13 AM

Yes please email it to me, and I'll upload it a.s.a.p.

dowser · 25th July 2008, 11:14 AM

You have email

Richard

Jan Dupont · 25th July 2008, 11:35 AM

Did you email it to Antoni or me ?

dowser · 25th July 2008, 11:43 AM

Both - it was 2MB in size, sent at 12:14 UK time.

Jan Dupont · 25th July 2008, 12:15 PM

Thanks Richard,

The file is available here:
http://www.audio-circuit.dk/Schemati...III_Manual.pdf

dowser · 25th July 2008, 12:40 PM

Thanks - I sent the other one too, but I'm not sure my gateway will let it out.

Richard

Jan Dupont · 25th July 2008, 12:42 PM

Yes that must be the problem, as I haven't received it......

3rd May 2006, 12:37 PM	#1
Antoni Rende diyAudio Member Join Date: May 2006	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

25th July 2008, 11:13 AM	#4
Jan Dupont diyAudio Member Join Date: Apr 2003 Location: Copenhagen, Denmark	Yes please email it to me, and I'll upload it a.s.a.p. __________________ Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com

25th July 2008, 11:35 AM	#6
Jan Dupont diyAudio Member Join Date: Apr 2003 Location: Copenhagen, Denmark	Did you email it to Antoni or me ? __________________ Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com

25th July 2008, 12:15 PM	#8
Jan Dupont diyAudio Member Join Date: Apr 2003 Location: Copenhagen, Denmark	Thanks Richard, The file is available here: http://www.audio-circuit.dk/Schemati...III_Manual.pdf __________________ Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com

25th July 2008, 12:42 PM	#10
Jan Dupont diyAudio Member Join Date: Apr 2003 Location: Copenhagen, Denmark	Yes that must be the problem, as I haven't received it...... __________________ Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com


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25th July 2008, 08:09 AM	#2
dowser diyAudio Member Join Date: Jul 2006	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

25th July 2008, 11:14 AM	#5
dowser diyAudio Member Join Date: Jul 2006	You have email Richard

25th July 2008, 11:43 AM	#7
dowser diyAudio Member Join Date: Jul 2006	Both - it was 2MB in size, sent at 12:14 UK time.

25th July 2008, 12:40 PM	#9
dowser diyAudio Member Join Date: Jul 2006	Thanks - I sent the other one too, but I'm not sure my gateway will let it out. Richard

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