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vynuhl.addict 22nd June 2013 03:47 AM

DIY linear tonearm
 
1 Attachment(s)
Here is my latest project, a linear tonearm. I thought I'd take a step away from the amplifier arena and give it a go, this is 1.5 weeks of work from start to finish and the sound
Is fabulous. Being mechanical without servo, carriage weight is of utmost importance!.


Colin

vynuhl.addict 22nd June 2013 03:50 AM

1 Attachment(s)
Another photo

directdriver 22nd June 2013 04:55 AM

Great work! Thanks for sharing your project online.

I just saw two DIY mechanical linear arms on a Taiwanese blog yesterday and they remind me of your project.


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This one on two rods like the Souther arm.

http://3.bp.blogspot.com/-RbfrfaHHFb..._MG_8956-1.jpg

http://4.bp.blogspot.com/-Bkds-WTo6U..._MG_8968-1.jpg


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Another one inspired by the Opus 3 Cantus tonearm.

http://3.bp.blogspot.com/-qqkBwHWAUl...de305430fd.jpg

http://3.bp.blogspot.com/-WBOfdAioc9...4783dd241c.jpg

http://2.bp.blogspot.com/-bi-PvlKvt9...c0d9abf7b3.jpg

http://2.bp.blogspot.com/-mwOgR76mRI...316_240156.jpg

http://2.bp.blogspot.com/-0buUzPQNZf...316_240141.jpg

vynuhl.addict 22nd June 2013 05:40 AM

Thanks Directdriver,

I looked a lot of the DIY designs, I didn't catch those though, thank you!. I wanted simplicity, I tried something years ago that didn't pan out but finally got onto one that did :). There is something about the sound of a linear tracker that once setup right just sounds more 3d sonically, more coherent and resolved.

vynuhl.addict 28th June 2013 09:48 PM

Upgrade
 
1 Attachment(s)
Upgraded version with a borosilicate glass tube arm wand which weighs a meager 2 grams. All mass total of carriage is 22 grams including cartridge, not bad at all.

vynuhl.addict 28th June 2013 09:54 PM

And another shot
 
1 Attachment(s)
Another side shot :). This is a phenomenal sounding arm, very neutral and tonally correct without emphasis across the audio band, surface noise is inky black on clean pressings.

directdriver 28th June 2013 10:17 PM

Really nice! Can you show more pictures from different angles so we can see the bearings? Thanks!

vynuhl.addict 28th June 2013 10:23 PM

1 Attachment(s)
Bearing shot, 4 5x9mm sealed bearings that ride on the top of the glass tube, I used brass bushings to essentially provide a double bearing effect which further lowers friction vs a locked bolted bearing center.

vynuhl.addict 28th June 2013 10:29 PM

1 Attachment(s)
Another bearing shot

vynuhl.addict 28th June 2013 10:35 PM

Also with the way the bearing rides only the corner of the bearing contacts the upper round of the glass which minimizes contact area which accomadates the vertical tracking from the same point as horizontal movement. The borosilicate glass is very hard to scratch thus remains very smooth and with a tiny bearing contact area dust doesn't impede movement.


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