Help VPI SDS Issue

Interesting question Tfkaudio-

I've always just left the motor switch 'on', and turned the tt on with the sds.

However, *for the sake of experimentaion*, I tried it as you described-motor switch off, turn on SDS-and the SDS almost *immediately* jumps from 115v to the 'run' voltage. Whereas, with the motor switch on, turn on the SDS, it takes about 5 seconds for the voltage to drop.

The sds was apparently designed to have the motor switch on at all times.

*Now we know!* (-:

Hmm, This sort of sounds odd, that VPI's own Table isn't compatible with thier own SDS, then one has to rip into the Turntable, to swap a Cap? Shouldn;t be I say, but if that's what it needs, then that would be the route I would go.

My HW-19 uses a 600rpm Motor, and never had an issue with the SDS, as far as start up.

Yes, the SDS drops to a lower running voltage, but upon start up, the SDS supposed to provide a full 115VAC for a few seconds, then ramp down the voltage to what one selects, or if that has yet to be done, the default voltage that was set by the factory.

This is to give the motor time to come to speed.
If 72V is too low, then yes, try the next higher up, or even two higher up. If you still have issues, definitely contact VPI, I'm sure they'll have some answers. Mark

How do you change the voltage on the SDS?

Call VPI

Even easier. Click this and there is a downloadable manual as well as the calibration information about half way dow the page. The calibration info tell you how to adjust the steps in the voltage.
http://www.vpiindustries.com/manuals.htm