Rpm's and The Strobe

Hello jsman
If your count of only 30 rpm is accurate, then you're talking about a 10% speed  variation. That would be audible.
I too have the KAB, along with several other stobes and other devices to check speed ( Feickert ), and the KAB is just as accurate as any of them.
Do you have another stobe you can use to verify results.

If not, go to vinyl engine and download one of the stobe patterns and check two ways:
1). With your KAB light source
2). With a standard incandescant bulb.

This should at least tell you if the problem is the strobe or your method of counting.

Cheers,                        Crazy Bill

Hi Bill,
Well I figure it out this morning, I was using the splice on the belt to count (dumb a--) instead of putting tape on the platter. Now I am counting 33 rpms and it matches the strobe...

Glad you worked it out.

Cheers,                      Crazy Bill