John Curl Mc Kinnie phono pre-preamplifier

[Antoni Rende]

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]

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]

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]

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

 

[dowser]

You have email

Richard

 

[Jan Dupont]

Did you email it to Antoni or me ?

 

[dowser]

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

 

[Jan Dupont]

Thanks Richard,

The file is available here:
http://www.audio-circuit.dk/Schematics/Mc_Kinnie_RO_III_Manual.pdf

 

[dowser]

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

Richard

 

[Jan Dupont]

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

 

[h_a]

Schematics! Schematics! Schematics!

Have fun, Hannes

 

[john curl]

I think you are at a 'dead end' with this design. It appears to be a modified Vendetta SCP-1, made by my former technician, Reza Oskoui, who made this run, with my permission, 25 years ago. The gain change is easy in concept in that it is only the load resistor that sets the gain, so an additional load resistor or a change in the load resistor should lower the gain acceptably. The internal parts are essentially unavailable at this time.

 

[h_a]

Thanks for your reply!

It's a pity, I thought that was another of your pearls (a new, different one I mean!)

Have fun, Hannes

 

[ken.berg]

Large files via email

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

Richard

The Lycos.com free mail accounts allow huge files, which are temporarily uploaded to a site and then are downloaded by the recipient.

 

[cazenabe]

Hi,
I'm French and owner of a pre-pre Mc kinnie RO III
Could you help me to find a schematic circuit and a user manual fot this item.
I can't access to website audio-circuit.dk due to a black list with my ip adress ?
Thanks for all
Best regards

 

[Aziello]

Mc Kinnie.

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

I have a RO III Pre Pre MC Kinnie. Unfortunately I don't have the user manual. On Audio circuit there is not. I am desperate because I cannot use it 100%. Can anyone help me?