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New DIY turntable project
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Old 14th July 2018, 02:12 PM   #1
garyroach is offline garyroach  United States
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Default New DIY turntable project

So, i've decided to build my secound diy turntable. The first one was good and taught me alot. This one will have a 12kg, 2" thick aluminum platter with a maglev bearing. To spin the platter i'll use a Jasmin motor, both available from china. I have settled on a Dynavector xx2MkII cartridge. The plinch will be made from four layers of 3/4" baltic birch plywood. For the tone arm i was considering the SME 309 or the Jelco TK 850. I know the SME is twice the price of the Jelco. Is the SME really that much better? Am i crazy to put a $2K cartridge on a $1k tonearm like the Jelco. Any thoughts on this would be greatly appreciated
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Old 14th July 2018, 05:21 PM   #2
bbftx is offline bbftx  United States
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What bearing are you planning to use?
Cheers,
B B
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Old 14th July 2018, 05:25 PM   #3
vinylkid58 is online now vinylkid58  Canada
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Quote:
Originally Posted by garyroach View Post
Am i crazy to put a $2K cartridge on a $1k tonearm like the Jelco.
The new series of Jelco arms look really nice. What cartridge are you using now?

jeff
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Old 14th July 2018, 08:14 PM   #4
analog_sa is offline analog_sa  Europe
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New DIY turntable project
IMHO the weakest part of your plan is the baltic birch plinth. To my ears BB alone sounds just dreadful as a plinth. Drilled through and as a part of a constrained layer it is somewhat improved but a lot of its inherent character remains. The 12kg alu platter is likely to also have a very strong sonic signature, unless it is also drilled or part of a sandwich - mine certainly has.

Sorry, can only offer negative experiences with parts similar to the ones you intend using. Never tried a maglev bearing, so no idea how this will contribute to the final sound.
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Old 14th July 2018, 08:45 PM   #5
garyroach is offline garyroach  United States
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vinylkid58
, i'm currently using a Sumiko blue point #2 Cartridge.

Last edited by garyroach; 14th July 2018 at 09:11 PM.
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Old 14th July 2018, 08:48 PM   #6
garyroach is offline garyroach  United States
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Here is a link to the platter, Super Sound Aluminum Platter+Tungsten steel Maglev bearing for Turntables | eBay

And this is the link to,the motor, Jasmine TM-R501 Turntable Motor turntable part High Torque Brushless DC Motor | eBay
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Old 14th July 2018, 09:18 PM   #7
garyroach is offline garyroach  United States
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bbftx,
The ebay add states the bearing is a tungston steel maglev bearing.
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Old 14th July 2018, 09:39 PM   #8
gigigirl is offline gigigirl
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Default Better to use a 12inch Temaad arm

Hi for such a noble build, you would get better performance by using one of the Temaad 12inch arms, Also they are cheaper to purchase than the Jelco.
I use one with my Dynavector XX1 and Koestu Rosewood & the performance is simply stunning.

Cheers
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Old 14th July 2018, 10:05 PM   #9
bbftx is offline bbftx  United States
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Hey Gigi,
That bearing looks pretty suspect. The arrow refers to a tiny button magnet and the model number for a free-standing motor. Doesn't make any sense. The bearing surface does not look like a precision set up.

Do you know anybody that has used this bearing? I see no reviews for it anywhere.
B B
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File Type: jpg maglevbearing.jpg (101.4 KB, 104 views)
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Old 14th July 2018, 11:12 PM   #10
garyroach is offline garyroach  United States
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bbftx,
The button magnet is used with a hall effect sensor for motor speed feedback control. It is for there propiatary motor that i am not intending to use. And yes i do know someone that has used this motor/platter bearing setup. His name is Troles Gravison of Denmark. He is a very prominent speaker designer employed by Jantzen Audio. Ckeck out his DIY site. I have built one of the speaker kits he designed. The Jensen 1071.
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