VTA tower very high; should I be adjusting something else?

VTA tower very high; should I be adjusting something else?

Postby BillK » Wed Aug 08, 2018 7:40 am

I just noticed that with my VTA tower set for the best sound with my SSM, Lyra Atlas and 10" 3D the VTA tower is so high the set screw on the rod right behind the tonearm rest completely clears the top of the rod!

I notice no other ill effects, I am just wondering if that's just wrong somehow or maybe I got something wrong way back when I had to install the new assembly for the 10" arm.

Stylus VTA is right at the almighty 92°.
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Re: VTA tower very high; should I be adjusting something els

Postby Brf » Wed Aug 08, 2018 8:08 am

BillK wrote:I just noticed that with my VTA tower set for the best sound with my SSM, Lyra Atlas and 10" 3D the VTA tower is so high the set screw on the rod right behind the tonearm rear completely clears the rod!

I notice no other ill effects, I am just wondering if that's just wrong somehow or maybe I got something wrong way back when I had to install the new assembly for the 10" arm.

Stylus VTA is right at the almighty 92°.


Does your table have the square arm board with the corner post cut out? By your description, it sounds like your arm board is not thick enough for the 2" platter height.
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Re: VTA tower very high; should I be adjusting something els

Postby BillK » Wed Aug 08, 2018 8:29 am

94C4A035-48BB-472A-A24A-6EEA931E5B57.jpeg
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There are three stacked L shaped rectangular aluminum plates of about 1/8” each atop the plinth with the VTA tower mounted atop the plates. I’m not sure if that is the square arm board you referenced or not but it is definitely cut out around the corner cap.

This was what was supplied in the upgrade kit to move from the 9” to 10” arm on the SSM.

The plates are L shaped to go around the cap for the right rear foot.
Last edited by BillK on Wed Aug 08, 2018 8:57 am, edited 1 time in total.
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Re: VTA tower very high; should I be adjusting something els

Postby BillK » Wed Aug 08, 2018 8:33 am

22D419DD-0952-4AD8-B6C7-6970A98E3535.jpeg
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Another view.
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Re: VTA tower very high; should I be adjusting something els

Postby Brf » Wed Aug 08, 2018 9:08 am

Your vta tower is at the very end of its travel.

I also noticed that your tonearm is riding too high up on the pivot spike. Please refer to this thread on how to adjust the pivot spike interface http://vpiforum.com/viewtopic.php?f=12&t=8069&hilit=pivot+spike+height

Once the tonearm is lowered onto the pivot spike, you can lower the vta tower.
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Re: VTA tower very high; should I be adjusting something els

Postby BillK » Wed Aug 08, 2018 9:20 am

9AE78EC6-128A-49F3-B31C-CCAE53D43CE8.jpeg
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Wait, if the tonearm is riding too high on the spike that’s good, as the VTA tower is cranked to get the rear of the tonearm as high as possible, or am I misunderstanding your instructions?

At present there is a 1/4” gap between the bottom of the tonearm azimuth ring and the top of the dogleg.
Last edited by BillK on Wed Aug 08, 2018 9:28 am, edited 1 time in total.
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Re: VTA tower very high; should I be adjusting something els

Postby Brf » Wed Aug 08, 2018 9:26 am

Opps, sorry you are 100% correct, my suggestion will make your vta tower issue worse. If your vta gap is 1/4 inch, you are good to go. Your only other option is to increase the tonearm board height. Perhaps VPI has additional spacers.

One last suggestion, when you remove the platter, is the inverted bearing support flange sitting directly on top of the plinth or does it sit on a spacer? If one a spacer, remove it to lower the platter.
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Re: VTA tower very high; should I be adjusting something els

Postby BillK » Wed Aug 08, 2018 9:32 am

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It’s hard to tell as far as the platter goes.

I dropped a line to info@vpiindustries.com to see if they have any suggestions.
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Re: VTA tower very high; should I be adjusting something els

Postby Golear » Wed Aug 08, 2018 10:32 pm

I just noticed that the bell housing that holds the cup for the unipivot seems to be different from my tonearm. On your arm, the bell housing seems to be quite tall, much taller than on mine. This would require you to raise the VTA adjustment in order to get the arm parallel to the platter.

Brf has already suggested adding more plates under the arm. If this base was higher, then the arm can be lowered by the same amount. As you've noted, it needs to be lowered enough for the set screw to contact the post. I'd add 4 or 5 more plates.
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Re: VTA tower very high; should I be adjusting something els

Postby BillK » Thu Aug 09, 2018 3:57 am

0592B8FC-8036-4E63-B3D7-E1079A5575C4.jpeg
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Those were supplied by VPI as part of the 10” arm upgrade kit for the SSM; I’ve no idea if they have any others and haven’t yet received a response to my email query, and I don’t know if there is a limit to how high the “stack” can get without sacrificing stability.
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