Audiophilepure

https://www.stereophile.com/content/analog-corner-269-techdas-air-force-iii-turntable-and-graham-engineering-phantom-iii-tonearm

The Air Force III’s platter is driven by an outboard synchronous AC motor that appears to be the same as the one supplied with the II, and controlled by the same or similar quartz-oscillator DC amplifier. The Air Force III uses one air pump for both the bearing and vacuum system, unlike the AF One, whch uses separate pumps for each. Motor and platter are linked by the same nonstretch belt of polished polyurethane fiber used in all Air Force models. The motor’s power supply and the silent, low-vibration air pump are housed in a plain black box measuring 13.8″ wide by 6.3″ high by 10.6″ deep and weighing 19.8lb.

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