Adjusting SRA using macro lens vs microscope

I have used a magnifying glass, and a comparison to an index card that has a vertical line and 92 degree line on it.

You have to "squint" for a hour, and have a micromiter head
height adjustment(like some VPI arms). But you can get close!

This gives a good starting point. Then follow through with very, very, small incremental adjustments, and a good "Ear".

You can hit the exact SRA in an afternoon.

A macro lens should work better!

Read this article for setting SRA!

http://www.audioasylum.com/audio/vinyl/messages/1240.html

@Dougdeacon

The cutter head is consistently set at 92 degrees on almost ever record cut. The proper SRA will yield excellent play back on 80% of all records. Best results only will be obtained with an MC cartridge on Panels (Magnepan) or electrostatic speakers IMHO.