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Old 31st May 2010, 10:22 PM   #121
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Here's my first lash up - proved it worked:-)
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Here is my Terminator copy.
Worked very well with a 33 PGT but I would guess not with the low compliance fair I am now using.

shutting the air pump up needed a sealed MDF carpet damped box with 6 5mm air holes.

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I also had it on a SL-1210 for a while.

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Air pump box
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Fun projects.
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Old 1st June 2010, 08:45 PM   #122
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I wonder....

I made my armtube holder in lignum vitae - think hard dense wood. But I've seen a few made here now in brass or alu. Do anyone know which might be better?

I went for the wood because I thought it would be lighter and therefore make the whole carriage lighter. But maybe I'm missing out?

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Fran
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Old 1st June 2010, 08:56 PM   #123
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Quote:
Originally Posted by woodturner-fran View Post
I wonder....

I made my armtube holder in lignum vitae - think hard dense wood. But I've seen a few made here now in brass or alu. Do anyone know which might be better?

I went for the wood because I thought it would be lighter and therefore make the whole carriage lighter. But maybe I'm missing out?

Comments?

Fran
I think that will depend on the compliance of the cart you are using.
You can see on one of the shots above I have extra angle aluminium on top that improved the sound. Can also play with massing the vertical too. Of course the air lift has to be able to carry it - Ultimately I think that is probably why they are not suitable for SPU's:-)
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Old 1st June 2010, 10:31 PM   #124
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mmm. I might just make up a crosspiece in alu and see does it make a difference. The problem is the table is sounding great at the moment, so I'm vey reluctant to touch anything!

FWIW, I've done a fair bit of messing with air supplies, and I think they make a large difference. Best so far has been 2 x aquarium pumps run in parallel. Gives the required airflow and at a low enough pressure.


Fran
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Old 2nd June 2010, 03:05 AM   #125
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Default Der AeroStatement

Just found another DIY arm from a German website that uses the New Way air-bearing bushing. Very cool! I think the name "AeroStatement" came from a pun on the Clearaudio Statement turntable that its linear mechanical arm uses an unusually wide mounting bridge.

http://methe-family.de/der_aerostatement.htm (German site translated via Google Translate)

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Old 2nd June 2010, 03:40 AM   #126
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Default Der AeroStatement

More pictures.

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Old 2nd June 2010, 11:08 AM   #127
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Wow that last arm does look chunky enough for a SPU doesn't it.
The Terminator has extra grub weights for the headshell and extra counterweight to mass things up...

Last edited by Speedysteve7; 2nd June 2010 at 11:16 AM.
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Old 2nd June 2010, 10:35 PM   #128
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That new way bearing looks like a great option.

I wonder would there be enough interest for a group buy of them, along with bar for them to run on?

How much are they?


Fran
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Old 2nd June 2010, 11:23 PM   #129
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Default New Way air bearing bushing

Quote:
woodturner-fran: "That new way bearing looks like a great option. How much are they?"
According to member Paul Eber in this post who has successfully build an arm out of the bushing and here's his quote:

Quote:
Paul Ebert: "The air bushing is from New Way Bearings (New Way Air Bearings). It is part #S301201 and the pillow block for it is part #S8012P01. They aren't cheap. The pair is about $240. It will operate between 40 and 80 psi, with 60 being recommended (high pressure for a tone arm). I managed to find a relatively quiet oil-less air compressor. It is a Thomas 607FA22 compressor. Even that is too loud (57 dB). It resides in the basement."
I think many already knew that the Kuzma Airline tonearm also uses the 20mm New Way bushing.

www.newwaydistributor.com/featuredapp.html - "Audiophiles Use Air Bearings for Sound Improvement"

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Old 3rd June 2010, 07:25 AM   #130
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Ouch!!

thats a lot of $$....

Fran
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