This is also another project I am working on but currently have too many things, and have to complete the GL-75, but this was just a test run. It will have to be completely rebuilt:
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These are some specs:
Description
The G99 is an update of the original g88 turntable and features infinitely adjustable speed between 30/86 rpm and 15/18 rpm via a conical spindle.
The unit is styled in the modern idiom by a famous industrial designer.
Specifications
AC mains 200-250V 50Hz
Mains switch fully click suppressed
4-pole constant velocity motor
Continuously variable speed control
Adjustable click in positions for 16, 33.33, 45 and 78rpm
8lb non-magnetic platter
Neon lit stroboscope
Centre spindle is of lapped, hardened steel in a sintered bronze bearing
Wow and flutter less than 0.2%
Rumble and hum negligible
Less than 1% speed variation
Fully positive drive and accurate control through precision conical shaft and vertical idler wheel
Automatic disengagement of idler wheel
Also some useful links:
http://theartofsound.net/forum/showthread.php?7952-Goldring-G99-Any-good