What's your SDS setting?

When VPI manufactures or sources components from their suppliers, they are spec’d to an acceptable tolerance. Variations in motor, pulley, belt and platter tolerance will result in slight speed variations.

For 2 tables to have the exact same speed without a SDS, both will need to have identical motor rotation, identical pulley diameter, identical belt tolerance with no stretch, and identical platter diameter without any deviations between the 2 samples.

If there is any deviation in tolerances between the 2 tables, they will have different speeds. It is simple physics. The SDS is designed to fine tune a table and to factor out the fact that each table will not have the exact same manufactured tolerances and be feed with a stable 60 Hz power.

If you believe that a lower frequency sounds better, then put on a motor pulley designed for a 11 ½ inch VPI platter and adjust your SDS to the low 50 HZ.

Wntrmute2
Oddly enough 58.79 Hz gives me perfect speed with a KAB
strobe on my TNT. Weird huh?

My old TNT was very close to this setting as well. And
around 64.50 if I remember with silk thread, dental floss
and fishing line. FWIW - if bypassing the belts, Mike at VPI
had a preference for fishing line when I talked to him a
while back. He said look for the Spider braided version.

Actusreus
but it seems to me that since all VPI tables are fully
functional and quite accurate without the SDS

Actusreus, the TNT was designed to work with a speed
controller. Otherwise it runs way to fast. So as a caution
anyone looking to purchase one used should ensure it is
being sold with a functional SDS. Otherwise budget an extra
$900 – 1000 into the purchase. I would not touch the old
PLC controller. Unless you like to rip out your hair.

Cheers

43°0′40″N
78°38′5″W

Bill,
Is the top one for 33 and the bottom one for 45?