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Finally! Automatic Speed Control...
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Posted on January 12, 2017 at 21:03:21 | ||
Posts: 23900
Location: Central Kentucky Joined: December 20, 2000 Contributor Since: January 29, 2004 |
I replaced the stepper motor in my Sota Millennia Vacuum turntable with a 3-phase motor and controller made by Phoenix Engineering. It's a prototype that never went into production, but Bill Carlin was nice enough to sell it to me so I could have automatic speed control for my Sota. I didn't expect to hear any difference, but I truly believe this new system produces greater clarity and tighter bass than before. It also might improve dynamic range a bit, too. Anyway, I'm very happy with the results and I will be playing more vinyl as a result. After buying the Phoenix Engineering RoadRunner tachometer a couple of years ago, I noticed that my turntable had a very long warm-up cycle. Of course, the Sota motor had fine speed adjustment so I could adjust it for accuracy but I had to keep adjusting it for nearly two hours before it finally stabilized. In fact, if I just turned it on and let it run it would start at about 33.100-rpm and gradually increase in speed for nearly two hours before stabilizing at 33.333. Because of this, I would generally let it warm up for two hours before doing any vinyl recording. Now, I can turn it on and within seconds the platter speed stabilizes at 33.333 +/-0.003-rpm. It's like having a quartz locked platter. Of course, all you inmates with Eagles and RoadRunners know how nice they are but I've been living with the RoadRunner only for the past two years. This new system is absolutely fantastic. Best regards, John Elison |
RE: 33.1 to 33.3 Audible?, posted on January 13, 2017 at 04:47:02 | |
Posts: 5666
Location: Louisville, KY Joined: January 7, 2012 |
It might be. Too slow is more detrimental than a little fast. -Wendell |
RE: Finally! Automatic Speed Control..., posted on January 13, 2017 at 07:32:07 | |
Posts: 762
Location: Kansas Joined: February 7, 2010 |
Very nice John |
RE: Finally! Automatic Speed Control..., posted on January 13, 2017 at 11:26:55 | |
I really would like to know how that 3 phase controller would work with a Pabst motor? And how it got so small. |
RE: Finally! Automatic Speed Control..., posted on January 13, 2017 at 15:52:32 | |
Posts: 124
Location: Tacoma Joined: January 6, 2008 |
Bill should have sold that business to someone!!!!! |
Thanks, Mel. /nt\, posted on January 13, 2017 at 19:18:49 | |
Posts: 23900
Location: Central Kentucky Joined: December 20, 2000 Contributor Since: January 29, 2004 |