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In Reply to: RE: Pocket Microscope for SRA and stylus examination. posted by MLKIII on April 15, 2017 at 08:36:33
what do you use for your visual reference?
I'm not questioning that it can't be done. I'm just not sure how this allows a "snap into focus" set up other than by chance.
"The piano ain't got no wrong notes." Thelonious Monk
I confess to eyballing 92 degrees based on looking at that angle printed on a piece of paper and counting on the memory. When I started, the diamond looked to be at 90. Using the ET, it was easy to raise the arm a few mm and see the effect. I may be at 91 or 93, but given varying thicknesses of LP's, that's OK.
For a 9"/230mm tonearm to get the SRA from 90 degrees to 92 requires an 8mm rise at the pillar.
For a 12 inch it's close to half an inch!
Pillar to stylus distance on an ET II is just a little over 8". It's also one of the few arms where you can adjust VTA/SRA without changing overhang. My guess is my adjustment was around 5mm.
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