2. analog
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Timeline Calculator

I just made a calculator in Excel for the Sutherland Timeline. You enter the distance to the wall and the laser deviation per revolution and it gives you the circumference of the virtual circle that the laser travels, the speed error of your platter in percent, the RPM your platter is off by, and the actual RPM of your platter. It can also tell you how many Hz a given frequency is off by.

Let me know if you would like to try it out!
ketchup
dickson
30 posts
 
Hi Ketchup,

I would appreciate if you could send one to me.
dickson@netfront.net

Thank you kindly.
frank_sm
113 posts
 
Anyone using the platterspeed app.?
Using any testrecord with a 3150 Hz track you can record and adjust with your iPhone (or iPad, or iPod Touch) from the loudspeaker in an endless loop.
ketchup OP
700 posts
 
Dickson,

I just emailed you the calculator.
ketchup OP
700 posts
 
Frank_sm,

That sounds interesting, but do you know how accurate it is?
garybx
9 posts
 
Frank_sm,

I am using the PlatterSpeed iPhone app in conjunction with the Analogue Productions test LP. It works great. I have a Rega P25 which is notoriously fast as are most Rega turntables. As I try different tweaks, I can quickly measure whether it makes the speed more accurate.
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