Best protractor is no protractor. Get a parallel tracker.
Parallel tracking arms also require alignment. Azimuth, VTA/SRA, overhang.
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- 33 posts total
No overhang on a linear tracker. My Eminent Technology "protractor" is clealy more accurate than for any pivoted arm I have seen - you align the stylus to a very fine scribed line. The ET protractor aligns to the bearing housing ensuring that the stylus is at precisely the correct position for accurate tangential tracking. For pivoted arms I use the Dennesen ( metal ) - the Feickert is easy but the size of the dot on which you place the stylus is far too big compared to the Dennesen and not anywhere near as precise as the ET. In fact a traditional accurate cardboard protractor with a pin prick for the stylus to drop into is probably more accurate than most - I have the old Garrott Bros protractors and they are very very accurate.
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As I said I have an Eminent Technology set up jig ( protractor ) that locks to the turntable spindle and bearing housing on the arm. It has a scribed line to set the stylus tip to. It is very accurate. http://www.eminent-tech.com/techsuppt.htm page 23 of manual
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Now for a somewhat different opinion. The horizontal tracking angle (HTA) that you are setting with a protractor is the least important setting of all to get with absolute precision. It is incorrect most of the time as there can be at most two places where it is correct, that is, stylus tangent to the groove. Moreover there are several solutions about how to set HTA, each of which has its partisans. So this is not a setting to obsess over. More important is SRA and especially azimuth. That being said, the $20 protractor sold by turntablebasics.com, used with care, will set HTA to the most popular setting as accurately as anything out there. Moreover it can be use with an arm of any length. The idea of spending big bucks for an HTA adjustment protractor seems unwise IMO. |
- 33 posts total