Using the VPI SDS with non-VPI turntables


The SDS makes a profound improvement in the sound of my early-model VPI TNT and is also great for changing the speed from 33 to 45 rpm. Now I'd like to try the SDS with another of my turntables, a modified Lenco L78, but want a little reassurance beforehand.

According to the SDS manual: "Remember, you can use the SDS for better sound on any turntable, but you can adjust the speed ONLY on turntables which have AC synchronous or induction motors and which have no electronic circuitry of their own." I have no idea what kind of motor is in the Lenco, but there's no electronic circuitry. One issue is that with the TNT at least, the SDS automatically reduces its operating voltage to 72 vac when set for 33 1/3 rpm.

Is anyone using the SDS with other (non-VPI) turntables? I'm mighty curious about whether the SDS would improve the Lenco, but I sure don't want to damage either one. Any thoughts? TIA, Dave
dopogue

Showing 5 responses by dopogue

I still don't understand. There are various cheap strobe discs available and (I think) one you can download, and the lever on the Lenco to adjust the speed is there precisely for that purpose. Why do you hate to use it? A VPI SDS will allow you to change the speed too, but without a strobe disc you're back where you started. I tried an SDS unit (the one I use with my VPI TNT) on the Lenco and prefer the Lenco without it.
Thanks, Rushton. I also found out that it's an AC Induction motor. I'll mate them up tomorrow and see (hear) what happens. Dave
Okay, I just took the plunge and plugged the Lenco into the SDS. After listening to tracks from about 6 LPs, all I can say is that I wish I had tried this about 6 months ago. I've used the SDS for a couple of years with the VPI TNT, but I'm afraid that the Lenco REALLY leaves the TNT in the dust after running it into the TNT. "Black hole" silence, explosive transients, and removal of the last little bit of edge and glare that I hadn't even known was there. Just amazing. If any of you has done the "Lenco thing" via the huge Agon thread started 1400 posts ago by Johnnantais, I hope you can give it a try. Dave
Not clear to me what you're asking, but the Lenco is indeed an idler drive turntable.
The speed of the L78 is infinitely adjustable from 16 rpm to beyond 78 rpm. I don't see how it could be running at anything other than the correct speed (assuming you have a speed measuring device) after adjusting the lever on the left of the turntable. Can you clarify?