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Old 24th December 2012, 09:14 PM   #31
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Originally Posted by jlsem View Post
Have you tried upgrading to a Titleist Pro V1?

John
That's the best post I've read on here ever.
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Old 26th December 2012, 10:46 PM   #32
Nanook is online now Nanook  Canada
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Default Wow, an arm thread I haven't seen yet!

madmike46: The arm looks very good, nice construction.

pdm4606: Tracking error does go down significantly as length increases. Firebaugh apparently limited the arms to 10.5 as a "practical limit" to fit most tables. It makes sense. A 12" effective length arm sits 3" further away from the spindle than a 9" (go figure). The best possibility is an infinitely long arm, but alas beyond practical application. 2nd place is a good linear tracker (I don't own an LT of any sort). Next a good pivoting arm of a practically long fixed length. I've seen photos of 25"+ arms but they can only exist where kids (or pets or spouses) can't. After 12" or so there are diminishing returns...
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Old 29th May 2013, 03:49 PM   #33
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Love the arm concept! Any progress during the winter?
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Old 29th May 2013, 04:08 PM   #34
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Originally Posted by Nelson Bass View Post
Love the arm concept! Any progress during the winter?
Not much has happened in the last while, had another turntable to repair for a friend, a Thorens TD-320 MkII with broken suspension parts. So I have been playing with that for awhile now. With summer here there won't be much happening till fall again.
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Old 6th June 2013, 02:37 AM   #35
Sprags is offline Sprags  United States
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Originally Posted by jlsem View Post
Have you tried upgrading to a Titleist Pro V1?

John
I was at a trade show for CAD/CAM software and one of the software companies was running their software on Cray supercomputers back in the mid 90's and gave away Cray golf balls as part of the promotion. I got about a dozen. I could sell one of those to you but then it would be a digital tone arm I suppose.
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Old 6th June 2013, 02:51 PM   #36
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Quote:
Originally Posted by Sprags View Post
I was at a trade show for CAD/CAM software and one of the software companies was running their software on Cray supercomputers back in the mid 90's and gave away Cray golf balls as part of the promotion. I got about a dozen. I could sell one of those to you but then it would be a digital tone arm I suppose.
The really big Cray's used to be liquid cooled too - this could pose a problem.....
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Old 6th June 2013, 04:44 PM   #37
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The really big Cray's used to be liquid cooled too - this could pose a problem.....
Since it's a really fast computer it may only work with 1,000,033.33 RPM records too.
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Old 6th June 2013, 06:26 PM   #38
Nanook is online now Nanook  Canada
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Default The really big Cray's used to be liquid cooled too - this could pose a problem.....

not really! Silicon damping fluid has very good thermal properties (good enough to resist automotive brake temperatures, good enough for a processor (or tonearm ).

I am considering making a DIT WTB for a friend using 2" wood dowelling for the tower and the tonearm rest. Having listened to my DIY 219 for several years now, I still cannot imagine a DIY WTL tonearm bettering it, but I am willing to concede that the WTL may be better. But unless the WTL is clearly superior to a SME 309 (or a Linn Akito II or a hotrodded Rega RB300) I won't be holding my breath.

The benefit of the 219 compared to the DIY WTL is that there are much fewer steps in making a 219 than a WTL. Almost everything else is similar between the two tonearms (I detest carbon fibre, so I used good old Easton aluminium arrow shafts). Really the only physical differences are the pivot details: bearing and cup based unipivot vs fluid damped ball unipivot. The main differences are the need to have access to some good machining vs. the "kitchen table" approach. If one had to pay to have machining done, I know the 219 would have the addition of a budgetary advantage.

madmike46: Please know that this post is not intended to be argumentative or to say that the WTB cannot compete with the 219, but more so to point out that the 219 is a "kitchen table" design and build. Nor is it intended to take away anything from your very impressive build. Your DIY WTL looks to be finished to a very high degree, and should certainly sound excellent (which I am sure it does).
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Old 6th June 2013, 06:53 PM   #39
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Originally Posted by Nanook View Post
not really! Silicon damping fluid has very good thermal properties (good enough to resist automotive brake temperatures, good enough for a processor (or tonearm ).

I am considering making a DIT WTB for a friend using 2" wood dowelling for the tower and the tonearm rest. Having listened to my DIY 219 for several years now, I still cannot imagine a DIY WTL tonearm bettering it, but I am willing to concede that the WTL may be better. But unless the WTL is clearly superior to a SME 309 (or a Linn Akito II or a hotrodded Rega RB300) I won't be holding my breath.

The benefit of the 219 compared to the DIY WTL is that there are much fewer steps in making a 219 than a WTL. Almost everything else is similar between the two tonearms (I detest carbon fibre, so I used good old Easton aluminium arrow shafts). Really the only physical differences are the pivot details: bearing and cup based unipivot vs fluid damped ball unipivot. The main differences are the need to have access to some good machining vs. the "kitchen table" approach. If one had to pay to have machining done, I know the 219 would have the addition of a budgetary advantage.

madmike46: Please know that this post is not intended to be argumentative or to say that the WTB cannot compete with the 219, but more so to point out that the 219 is a "kitchen table" design and build. Nor is it intended to take away anything from your very impressive build. Your DIY WTL looks to be finished to a very high degree, and should certainly sound excellent (which I am sure it does).
Thanks for the kind words Nanook. Being a machinist is why I went to the WTL design, I have been looking at your thread on the 219, that is a very simple arm, I might have to try one like it later on.
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Old 8th June 2013, 09:57 PM   #40
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The only advantage of the WTL would be motor noise isolation. So if your motor vibrates then you would notice a difference. The other option is to isolate the motor itself. I agree with Nanook in choosing aluminum over carbon for the arm itself. Carbon likes to Obsorb energy, so if you combine it with a low mass cartridge you will end up deteriorating the signal.
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