Amazon.com: Profesional LP Vinyl Phono Speed Test Disk, LP Vinyl Turntables Record Tachometer Calibration Disc for Record Head Calibration and Rotational Speed Detection : Cell Phones & Accessories
Nobsound Hi-end Mini Portable Turntable Speed Tester Strobe Disc & Light Calibration Tachometer Lamp - Home Theater Amplifiers - AliExpress
Portable Digital Laser Tachymeter Speed Tachometer Tester for LP Vinyl Turntable | eBay
You Can DIY! The TSM-100 - A Turntable Speed Measurement Device | audioXpress
Rega Strobe Kit – designed to evaluate the speed of any turntable
VPI Stroboscope Disc LP Speed Control Strobe Disc (60Hz Only)
DIY LP Turntable tachometer | stockholmviews.com
My turntable's speed sounds kind of off. Assuming this app is correct, what should I be looking for? : r/turntables