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Can't set rake angle right even lowest VTA (digital microscope checked)

Following Michael Fremer's instruction (makes sense) to set up stylus rake angle with digital microscope (https://www.youtube.com/watch?v=otysEyET6yE) and found that with lowest VTA setting, my angle is 96 degrees (from starting point of 102 degrees! when arm is parallel to the record with the target of 92 +/-1 degree). Cartridge is Ortofon Kontrapunkt C (recommended VTA 20 degrees, now at 23 degrees), VPI 10.5" arm. It definitely sounds a whole lot better esp mid range and high but arm/stylus almost had no clearance to the record. This is weird and I shouldn't need to set the height at the bottom of the tonearm tower. Tracking weight is 2.6 gm within recommended range.
Thoughts are appreciated.
goldeneardoc
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rauliruegas
13,052 posts
 
Dear @goldeneardoc : VPI tonearms has a especial kind of alignment that's not Barwald or Löfgren and that kind of alignment cause a overhang of deviation of 2mm. against the other alignments y could be the reason of the trouble you have about.

I think that what you have to do is to put in contact with VPI to look for its advice because what @jperry posted is rigth.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.
chakster's avatar
chakster
6,144 posts
 
Everyone should look at this picture to understand how to meassure correct SRA with the most compliacated diamonds like Fritz Gyger 80 or Ortofon Repliacant 100. If someone is trying to make the whole diamond perpendicular to the record surface by lowering the arm then it is incorrect when it comes to FG or Replicant 100 shape. It is not a tonearm problem, but just the way a person meassure SRA with digital microscope.
goldeneardoc OP
19 posts
 
Indeed it's a user's lack of knowledge....the easiest and cheapest fix is to come too those who can help clarify things so thank you.
ninetynine's avatar
ninetynine
135 posts
 
You have to work with the position of the lightning to see the edge of the diamond cut.

With bad light you cannot adjust the correct SRA.

http://orangeaudio.de/temp/mimc2.jpg
Here with a flashlight that i have moved so long until i could see the edge.
http://orangeaudio.de/temp/mimc_sra.jpg
vtglife
8 posts
 
That is not 92 degrees to the last picture above me. Not trying to be rude but even with that cut, that line is wrong. That's like 95 easily 
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