My 1980's Tangential Tone Arm and my 2010 improvement - Page 2 - diyAudio
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Old 8th December 2010, 06:10 AM   #11
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Default @ Shaun

Thank you Shaun,

I am quite excited about my 2010 version of this arm. In the next few days I'll post what I have sofar.

Ralf
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Old 8th December 2010, 06:13 AM   #12
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Default @ Shaun

Hello Shaun,

I'll do that tomorrow when I have daylight available.

Ralf
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Old 8th December 2010, 07:53 AM   #13
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Default @ Straight Tracker

You really did learn them skilz didn't you?

WOW

Gonna get some metal work fabrication training from an engineer over the next few weeks. Doubt I'll get to where you're at though
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Old 8th December 2010, 07:56 AM   #14
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3x Nice!

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Old 10th December 2010, 12:57 AM   #15
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I'm replying as a way of keeping track of this thread......
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Old 10th December 2010, 02:13 AM   #16
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Default Hello theophile

I'll try to keep it interesting.

Sincerely,

Ralf
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Old 10th December 2010, 02:16 AM   #17
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Quote:
Originally Posted by Straight Tracker View Post
I'll try to keep it interesting.

Sincerely,

Ralf
I promise you,I skip right-over the 'fluff'.

This was interesting from the initial post.Bullseye!
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Old 10th December 2010, 02:25 AM   #18
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Default Hello Shaun

As you requested, here is a comparison picture of the original prototype and what I call the intermediate version.
The large teardrop shaped base of the original prototype is not really part of the tonearm, rather it is an adapter so that I can mount the tone arm on my oversized Micro Seiki BL91L turntable. As you can see, the overhead track housing is the same on both tone arms. Except that the intermediate version has a transparent cover, so that the special cams and the cam follower can be seen.

Sincerely,

Ralf
Attached Images
File Type: jpg COMPARISON_ORIGINAL_INTERMEDIATE.jpg (621.7 KB, 833 views)
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Old 10th December 2010, 03:16 AM   #19
Shaun is offline Shaun  South Africa
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Thanks, Ralf. I'm sure this is the most exciting development in vinyl playback systems in recent times.
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Old 10th December 2010, 06:06 AM   #20
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Default Hello All,

Now, that I’ve laid the ground work, I am going to post on the new 2010 version of my Tone Arm.
Things are going to progress more slowly from now on because I am building the Tone Arm as we speak, in Real Time, you might say. Of course I would have been done years ago if I hadn’t allowed the appearance of CDs to discourage me.
Over the years I have established certain features that I wanted to be in my Tone Arm:

1) The Tone Arm shall be of the Tangential type that freely pivots on a carriage that is designed to travel in a straight line, which runs through the center line of the platter of the turn table.
2) The pivot for vertical motion shall be level with the top of the LP.
3) This pivot shall not move up or down when VTA/VRA is adjusted.
4) The azimuth adjustment shall be as close to the Tone Arm pivot as possible.
5) The Tone Arm shall not have an offset head shell. ( No skating )
6) The Tone Arm shall freely pivot, to guarantee low horizontal and vertical mass.
7) If possible, the servo mechanism shall be mechanical rather than electronic.
8) At least, the pivots for vertical motion shall consist of “Free Flex Pivots”. http://www.flexpivots.com/swf/single.html

I have used the pivots in item 8) with success in my first prototype. They have no friction, no free play and require no lubrication, Ever. In addition, because these pivots are essentially rotary springs for limited angular rotation they can be used to apply the tracking force to the Tone Arm.
I am attaching three PDF files that show the 2010 version of my Tone Arm in the Rest, Start of play and End of play position. The tracks and the control mechanism have been hidden in the base.
Sincerely,
Ralf
Attached Files
File Type: pdf MICRO_SEIKI_REST_ASSY.pdf (29.5 KB, 254 views)
File Type: pdf MICRO_SEIKI_START_PLAY_ASSY.pdf (30.8 KB, 217 views)
File Type: pdf MICRO_SEIKI_END_OF_PLAY_ASSY.pdf (31.1 KB, 200 views)

Last edited by Straight Tracker; 10th December 2010 at 06:09 AM. Reason: formatting
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