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Old 3rd September 2013, 07:50 PM   #501
lexx21 is offline lexx21  United States
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No no... I am talking about the arm itself, not the borosilicate tube that the bearings roll across.

For the arm (what the cartridge is directly attached to) I am concerned about resonance, etc.... I already have 10mm borosilicate tubing, so that part isn't the issue.
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Old 3rd September 2013, 07:52 PM   #502
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From the looks of the Cantus and measuring from a photo, I think it is 16mm guessing by the size of the bearing. 2 mm thick.

Lexx21, for the support arm weight is not an issue, in fact fill it with sand to dampen resonances. For the tone arm and counterweight tube, lightweight is an issue. I used CF tubing from a kite shop. FunWithWind dot com SkyShark Carbon P90 tubing. It is super light and stiff.
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Last edited by SGregory; 3rd September 2013 at 08:03 PM.
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Old 3rd September 2013, 08:59 PM   #503
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For those interested in dimensions, the one I can give is the center of tube to cart mounting bolts is 2 3/8", hope this will help. Ideally this should be adjustable, I originally built the fixed carriage without adjustments, then came to realize that adjustments were indispensable for setting tube length and azimuth. Polycarbonate might be heavier, but not as rigid for a given size compared to carbon fiber.






Colin

Last edited by vynuhl.addict; 3rd September 2013 at 09:08 PM.
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Old 4th September 2013, 12:01 AM   #504
Golana is offline Golana  United States
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Sorry 'bout that Lexx. Did you see Veteran HIFI- Simply Black, Their's looks to be alum. or quite possibly titanium. Also their shaft length is definitely shorter than OC3.
@v.a- is yoours 2-3/8, adjustable or OP3. I know you previously said yours to be between 2 and 2.5".
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Old 4th September 2013, 03:00 AM   #505
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Mine is 2 3/8", it's a compromise, between too short which gives more sensitivity to VAT on slight warps and almost insensitive to warps. Much has to do with the slung height, that's why I tell anyone who wants to build it to go no bigger than 10 mm for tube width.


Colin
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Old 4th September 2013, 11:55 AM   #506
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I found all the parts I needed but the 10 mm glass tubing, so I ordered it on line. I have more than I need so if anyone needs some, I should have three extra tubes (they are 12" long). I' have extra 5/8" CF arrow shaft for the arm tube if anyone needs that (easy to find at a sporting goods shop). Used if for a uni-pivot design and works great with a little foam stuffed in the end for resonance. Shouldn't need foam with a short 2 or 3" arm tube.
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Old 4th September 2013, 12:50 PM   #507
lexx21 is offline lexx21  United States
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One of the things that would be great would be for a basic mechanical drawing of the arm. Does anyone have one that they could post? It would save on material waste and those "oh man.. should have done that.." type moments.
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Old 4th September 2013, 03:58 PM   #508
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Basic mechanical drawing of the arm would be nice to have. You may find some hints, however, when looking at the Clearaudio Statement TT1 arm: http://www.muz.lt/saugykla/failai/Pu...it_07_Eng.pdf; page 13. The armwand is 186 mm long and has a total weight of 24 g.
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Old 4th September 2013, 04:31 PM   #509
AuroraB is offline AuroraB  Norway
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Corrected link:
http://www.muz.lt/saugykla/failai/Pu...kit_07_Eng.pdf
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Old 4th September 2013, 06:20 PM   #510
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Default Hello lexx21

Quote:
Originally Posted by lexx21 View Post
One of the things that would be great would be for a basic mechanical drawing of the arm
You'd have to have a few basic dimensions to do that. Good luck with that. I tried to get just the height of the glass tube above the LP from vynuhl.addict, to no avail.

Sincerely,

Ralf
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