2. analog
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TT speed

When I use a protractor to align the stylus I do the alignment at the inside, and then rotate the platter maybe 20 degree when I move the arm to the outside of the LP, or protractor.

On a linear tracking “arm” it would not need to rotate at all.

At 33-1/3, then 15 minutes would be about 500 rotations. And that 20 degrees would be a delay of 18th of a rotation.

So a 1 kHz tone would be about 0.11 Hz below 1000.
It is not much, but seems kind of interesting... maybe?

128x128holmz

Showing 1 response by wolfie62

wolfie62
352 posts
 

Use an arc protractor.

Align stylus tip to arc for full sweep. Make parallel to only 1 grid, inside or outside, your choice. DONE. No guessing. No trial and error, no back and forth. The 2-point protractor is archaic and very inaccurate. 
 

I have 123 cartridges, so doing alignments is common. Takes about 5 minutes. I use Lofgren B DIN mostly. Sometimes Stevenson DIN. The Arc protractor is deadly accurate and quick. I use it for conical, elliptical, HE, LC, MR tips. I get no IGD. Haven’t heard that in years. 
 

For printing your free arc protractor, you need your pivot to spindle distance; it’s a spec for your turntable or you can measure it. Choose your alignment (Lofgren A/Baerwald, Stevenson, Lofgren B) EIC/DIN/RIAA null points, and print. Easy peasy!

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