Ideal SRA Calculator
Once you have determined your "Native" Stylus Rake Angle (SRA)*, install the front/back (SRA) WallyReference blade (Indirect Azimuth - Type I or True Azimuth - Type II depending on your tonearm mechanism type) and enter the information in the calculator below. The result is a figure that you should raise or lower your tonearm by - using the WallyReference as the measuring tool - in order to achieve a perfect 92 degree SRA under dynamic (record playing) conditions.
* Native SRA of a cartridge is determined under the following conditions using microscopy:
1. Top surface of the cartridge is perfectly level
2. Nominal VTF is applied
3. Photograph is taken with perfect perpendicularity from the cantilever
See instructions for dynamic SRA measuring process HERE