Thom, I agree with you about using a tuning fork if the test record has a 440 hz tone band on it. Like Stringreen, I am a violinist and as you know we tune the violin to A 440hz. I have a Stereo test record that must be 25 years old and it has a 440hz test band and I play that and adjust the speed until it matches the tuning fork. I have found that it works great.
Carter
Carter