Vinyl and Turntables
Vinylengine.com has to be the single best resource on the Web for all things vinyl. It’s a community forum that help out with issues and contains a plethora resources such as service manuals. Registrations are typically closed/limited so do check back often.
This page links free turntable cartridge algnment protractors and strobe discs (I use the Technics 1200). There’s also advice and explanations for various other aspects of maintaing a turntable and vinyl collection.
https://www.audioappraisal.com/free-cartridge-alignment-protractors-and-strobe-discs