The method suggested by the Acoustic Sounds turntable tech using a 1kHz test tone and a DMM is a very accurate way to calibrate the speed of your turntable. If you have a test LP with a 1kHz tone track and a DMM, you have everything you need. Laying out the money for a strobe won't buy you greater accuracy, but you might find the strobe to be a bit more convenient to use.
Measure My Turntable Speed
I've been told that a very accurate way to measure the speed of a turntable is by using a test meter set to khz, placing the positive terminal into one of the outputs of the phono stage (or tape output), the other to the ground and then play a 1000hz test track of our a good quality test record... If the table speed is good, the reading should be very close to 1khz...
Ever tried this one?
Ever tried this one?