Dumb VTA Question


Sorry ... I have a dumb question about setting VTA. I own a VPI Classic TT which has "VTA on-the-fly" capability. My cartridge is the Lyra Kleos. When I mount the Kleos, the last adjustment is VTA. I start by setting VTA so that the tonearm appears horizontal. Then while I'm playing a record, I raise the tonearm and then lower it until I like what I hear.

Ok ... that's what I do. But here's the dumb question. Some vinyl buffs talk about setting VTA at 91.5 degrees, or 92.5 degrees, and the like. How the heck can someone know the degree of VTA adjustment with such precision?? Is there a tool or special protractor that permits such close adjustments?

Thanks for the education.

BIF
bifwynne

Showing 3 responses by bifwynne

Thanks guys, esepcially for the terminology lesson. I always thought that VTA and SRA are flip sides of the same adjustment. That is, VTA and SRA change as a result of raising or lowering the tonearm.

Jonathan, I can visualize that raising the tonearm geometrically changes the effective length of the tomearm. And, the VTF force vector will correlatively change as well. However, I find that these variables change only slightly. Maybe it's because my tonearm is 10.5 inches long.

In my earlier days of vinyl OCD, I actually remeasured alignment, VTF and even azimuth after changing VTA/SRA. The changes were very, very slight. Too much OCD for me now to mess with it. But ... I am able to detect changes in the acoustic presentation when I raise/lower the tonearm.

So, as I mentioned above, I start out by setting the arm to be horizontal/level based on an eyeball look-see. Then I raise/lower the arm until it subjectively sounds best to me.

I'll check out the links provided. Thanks for that information.

That leaves me with a question or two though, perhaps best addressed by Jonathan Carr. Could my methodology damage my "beloved" Kleos cartridge/stylus or my LPs? Relatedly, is my "eyeball" method resulting in degraded sonics, qualitatively speaking? Is it worth investing in a USB digital microspope?

Thanks again guys!!

Bruce

P.S. -- Jonathan, would you kindly repeat your advice about sending my Kleos cartridge back to Lyra for an inspection and adjustment (if needed). I'd like to have it checked to ensure that it is operating within spec.
Folks, I make this post with a smile and a frown. Based on the good advice from Jonathan Carr and a few others, I've made arrangements to send my Kleos back to Lyra for a check up. The smile is that I am taking the advice of people who know what they're talking about. This way I'll know that my Kleos is in tip-top working order when it comes back in 6 to 8 weeks.

And that's why I am sad. :( I won't be able to use my Kleos for 6 to 8 weeks.

IMHO, this is one super-duper cartridge. I still have my S-S VPI Zephyr, but the Kleos is in another league.

What else can I say? :( I suppose, if this is the worst thing that ever happens to me, thank G-d.

Bruce