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Old 6th June 2013, 07:15 PM   #21
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it is rather simple :
FX-R
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Old 6th June 2013, 07:17 PM   #22
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when you want a bend arm and a removable head shell here is the EMT " Banana" :
http://www.emt-studiotechnik.de/Tonearm.htm
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Old 6th June 2013, 07:33 PM   #23
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Quote:
Originally Posted by Joachim Gerhard View Post
Be Yamamura made an arm like that a long time ago
That arm is the same as the RS Lab or 47 Lab arm. But I must point out just because it has a pivoting headshell it does NOT mean it is for adjusting for tangency. I read the designer's paper and it is purely for lessening skating force. But many people mistaken it as a tangential arm. The Thales or the Garrard Zero 100 are true to the tangential pivoting genre.

Sorry for the distraction and being off topic.
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Old 6th June 2013, 07:45 PM   #24
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No, this is ok. We are still searching for ideas.
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Old 6th June 2013, 07:48 PM   #25
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here is some information about tracking error :
http://www.helices.org/auDio/turnTable/stevenson.pdf
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Old 6th June 2013, 07:51 PM   #26
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The round black thin is a golf ball indeed. The arm is a DIY clone of the "Well Tempered" Tonearm by William Firebaugh. The arm is hangig on a nylon string. To avoid it from dangling, the golf ball is damped with silicone oil. I'm currently working on an improved version. Curryman and me are also thinkig about providing 3D models of the main parts to make it 3D printable for the DIY enthusiuast who does not own a lathe and a mill.
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Old 7th June 2013, 09:46 AM   #27
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by Joachim Gerhard View Post
when you want a bend arm and a removable head shell here is the EMT " Banana" :
http://www.emt-studiotechnik.de/Tonearm.htm
This one uses a Thorens bearing
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Old 7th June 2013, 09:49 AM   #28
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by MiiB View Post
Nothing beats an oil film for noise performance, if you aim for Mag-lev, then please consider that the Neo magnet are far from homogenous, and if you use repelling magnets you are bound to get wobbling forces on your bearing.

sorry, no free lunch..
Maybe you could use two platters, the lower one has the bearing, the upper one sits on the lower one using mag lev. Both platters turn simultaneously, drive is applied on the lower platter.
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Old 7th June 2013, 02:35 PM   #29
AVWERK is offline AVWERK  United States
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The funk firm way of stopping bending modes can be done with a thin wall titanium tube and pounding a square piece of balsa wood down into the tube to create a similiar strong arm tube that stops its high Q resonance. And thats just the beginning..

You want the headshell platform as rigid as possible to transmit stylus micro details that get quenched with any designs that loose this tight connection.
These designs with pivoting headshells for tangency and such are going in the opposite direction of a solid platform needed for the best cartridges. Creating one cure shouldn't result in another disease.

Regards
David
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Old 7th June 2013, 02:51 PM   #30
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Quote:
Originally Posted by Doppelkopf View Post
PTFE/PE Bearings seem to be a bad idea .
I'm using PTFE bushing and SS bearings in the gimbal for my DIY tonearm.

Was thinking about the charts I've seen on tone-arm mass/cartridge compliance and the multiple resonances, peaky resonances. If the "Q" of the impedance peak is sufficiently low, should it matter?
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