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Old 20th December 2008, 03:37 AM   #1
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Default LP 12 and Mark Kelly's Board

Hi,

I am currently in the process of refurbishing an old LP12. It has an original Valhalla board and very tired motor. I wondering if it would be possible or even wise to switch out the board and motor with Mark Kelly's 2.0 PCB controller board and associated Maxon motor.
I have Mark Kelly's PCB and motor as i took part in an old group buy but never got around to stuffing the boards.
The linn platter is approx the same size as anything else that i would have used and as long as i use the pulley that was designed for the Kelly PCB i should be at least within the correct range?
Any thoughts or warnings?
Cheers
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Old 20th December 2008, 06:04 AM   #2
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Are you sure it's the motor, usually the Valhalla is the one who gets tired first.

Were you going to adapt the Maxon motor to the LP12, or use the platter/sub-platter/bearing from the Linn and build something else?
Sorry, I'm not familiar with the 2.0 PCB controller/motor. Is it DC?

Didn't you have a Pass Pearl for sale a while back?

Jeff
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Old 20th December 2008, 06:33 AM   #3
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I am planning on using the LP12 chassis, bearing, platter and sub platter with Marks controller and DC motor.
I have done a bit of research and it appears that a company sells a motor kit that is basically a DC motor with controller for the LP12. It might take a bit of fiddling with the dip switches but i see no reason why Marks parts can stand in place of these:
http://www.turntable-power-supply.co...12_fitting.htm
http://www.turntable-power-supply.com/index.htm

I landed up donating the Pearl to Burning amp. I believe the proceeds went back to DIY audio
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Old 20th December 2008, 07:00 AM   #4
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Sounds like the mod should be pretty straight forward. As long as the motor/pulley speed is correct, everything else is just mechanical.

You could build a nice box for the PCB similar to the Origin Live unit with appropriate switches etc.

I've never heard an LP12 with the Origin Live DC kit, but reviews are mostly positive.

Jeff
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Old 21st December 2008, 06:32 AM   #5
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IIRC the Linn subplatter is about 150mm diameter in which case you're best off with a pulley somewhere between 7.5 and 15mm diameter if using the 110191 motor.
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Old 27th April 2009, 04:31 AM   #6
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Finally finished installing the LP12 with Marks' DC controller and Maxon motor. Smooth, clean and dead stable
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Old 27th April 2009, 04:33 AM   #7
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and completed turntable
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Old 27th April 2009, 07:23 AM   #8
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Interesting. So, batteries and board went all inside? This is now a high mass turntable. Can you say more about the sound? Bass?
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Old 27th April 2009, 03:28 PM   #9
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In all honesty i have nothing even close to compare it to. It replaced a Rega P3 with plex platter and Elys cartridge. The Linn runs with a Denon DL103 cartridge.
To my ears the Linn smokes the Rega set up. There is more authority in the base and far more separation across the spectrum. But the mids is were it really shines. PLaying Cat Power is breathtaking.
I do have a couple of questions though:
1. The feet on the turntable are currently three spikes, which i did mostly for leveling purposes. What might I expect to happen if i replaced the spikes with rubber feet?

Thanks
Neil
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Old 27th April 2009, 03:55 PM   #10
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Comparisons with a P3 is not what i had in mind. I assumed you did listen to the Valhalla/airpax.
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