strobe light question


I have a Oracle Delphi MK II
It has 2 screws in the back for 33rpm and 45 rpm.
Is the 33 rpm actually 33 1/3 rpm?
I want to check the speed to make sure its dead on.
Is there a commercial product strobe light like auto mechanics use that would work?
It seems it may be cheaper to buy one of these.I dont want to spend alot to check the speed once.
david99

Showing 1 response by tireguy