Measuring TT Speed


In measuring my tt speed I am seeing the lines on the strobe bounce back and forth, not holding steady. This is a belt tt with a dc motor setup with a closed loop controller, and ideas on what can cause this? I am thinking the belt may be to tight, it is a new belt BTW...
jsman

Showing 1 response by bukanona

In my phone LG v30+ RPM metter shows 32.83 instead of 33.33
Both my turntables has strobe's and one of the even has custom built. And if I do measure friends machines I am getting the same error always so for me it's usable but it's not measurement tool. It's phone with gyroscope which is not calibrated.