David, for almost no cost find an LP with speed bars. The M&K Realtime Direct to Disc and many audio "test" discs have this imprinted on the record label. A small neon night light from Radio Shack works perfectly as a strobe source.
I used this at a friends house recently and when I went back to verify with my KAB, the speed was perfect.
I used this at a friends house recently and when I went back to verify with my KAB, the speed was perfect.