Smognote, runout is the very small distance between moving parts such as collars and bearings. Without runout the two pieces would be press fit together and they wouldn't spin. Bearings are naturally susceptible to chatter and the transmission of environmental vibration.
The spindle in the Well Tempered is immersed in lubricating fluid and constantly in contact with four nylon/plastic points. The platter belt preloads the spindle into these points constantly. The Well Tempered cleverly and economically addressed many turntable issues years ago.
There are decent turntables that use this old metal collar bearing technology with good success. I'm so tainted by the simplicity of the Well Tempered that when I see these exotic and expensive methods to correct these old problems I'm humored. Todays somewhat expensive magnetic suspension is taking the spinning platter to yet another level of performance
Another take on a bearing with runout is the DPS turntable that Ayre Acoustics markets. From what little I've read the bearing is under constant friction. The motor that drives the platter is very robust to be able to turn this very tight bearing. The reviews on Ayre's unassuming DPS turntable are very good.
The spindle in the Well Tempered is immersed in lubricating fluid and constantly in contact with four nylon/plastic points. The platter belt preloads the spindle into these points constantly. The Well Tempered cleverly and economically addressed many turntable issues years ago.
There are decent turntables that use this old metal collar bearing technology with good success. I'm so tainted by the simplicity of the Well Tempered that when I see these exotic and expensive methods to correct these old problems I'm humored. Todays somewhat expensive magnetic suspension is taking the spinning platter to yet another level of performance
Another take on a bearing with runout is the DPS turntable that Ayre Acoustics markets. From what little I've read the bearing is under constant friction. The motor that drives the platter is very robust to be able to turn this very tight bearing. The reviews on Ayre's unassuming DPS turntable are very good.