SDS question

That's quite a bit of a jump in hz, considering it was dead on before.

As James suggests, it may be a Lube issue? When was the last time you Lubed the bearing? If you're using VPI Grease, maybe a drop of Mobil 1 to cut it ever so slightly?

Or it might be Belt slippage? When was the last time you replaced the Belt? At least try cleaning the Belt, and edge of Platter (Windex), and see what happens?

There was a recent thread about the SDS slightly wandering, but very doubtful you're wandering as much as .18hz

Let us know if you find anything? Mark

are you plugging the sds into the wall or a power conditioner? House power can vary +/- 10 volts at times. I realize the sds is suppose to handle that but I find using my PS audio 300 power plant eliminates this prolem

Its been a while since I was up to date on TT technology. What kind of motor is used? A synchronous motor, common decades ago, would assure that the rpm was exact ("dead nuts" is the technical term). Bearing lubrication, temperature or phase of the moon would have no effect. Only a change in line frequency would affect speed.

Start with the lube and proceed to the belt. I think keeping the bearing lubed may be the most overlooked "tweak" or maintenance procedure. Throwing a few drops of factory-approved oil in the bearing made my near-new Technics SL12x0 spin much nicer and a little quieter.

Belt wear and slippage is a continuous process and usually doesn't get addressed until it's obviously audible. By then it makes the turntable sound like it's seriously broken. But one would think intuitively that a belt could wear and slip the equivalent of .18Hz over time, and one wouldn't notice unless strobing it.

Just following up on Starcons' comments, I was at 60.54 before hooking up my PS Audio PPP. Now the SDS is at 60.00 and my turntable sound is noticeably improved.