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
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
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
I found this post trying to find the connection between John Curl and this pre-pre - do you have any background?
Thanks, Richard
Thanks Richard,
The file is available here:
http://www.audio-circuit.dk/Schematics/Mc_Kinnie_RO_III_Manual.pdf
The file is available here:
http://www.audio-circuit.dk/Schematics/Mc_Kinnie_RO_III_Manual.pdf
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.
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
It's a pity, I thought that was another of your pearls 😀 (a new, different one I mean!)
Have fun, Hannes
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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
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
Mc Kinnie.
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?😕😕