Is VTA and SRA the same thing?


Hi Audiogoners.
I understand ther refer to Vertical Tracking Angle and Stylus Raking Angle.
What I would like to know is are they the same thing? I mean, every time we change the VTA, let say 1degree, then the SRA will change the same 1 degree?
Thanks,
Calvin
dangcaonguyen
No. VTA is the angle of the cantilever relative when the cartridge is horizontal relative to the record. This is set by the cartridge manufacturer (it's usually 20 degrees). SRA is the angle of the stylus relative to the record surface. The text-book correct angle is 92 degrees. Ideally, you adjust the arm parametres VTF, overhang, azimuth), you then adjust SRA to 91-92 degrees by lifting or lowering the arm, then, if you're still there, readjust overhang, re-check SRA, and play music. Final fine-tuning by ear. Good luck!


dangcaonguyen
So the VTA cannot be adjusted by the end user?
The VTA can be adjusted by raising or lowering the pickup arm, but the optimum VTA is determined by the phono cartridge manufacturer and - to an extent - the VTA of the actual cutting stylus.