VPI SDS help


I bought a VPI SDS here on Audiogon for my townshend rock 7 turntable. According to my research The rock 7 is ac motor 110 volt.

I installed the SDS with the TT but the TT motor is spinning very slowly at the 33rpm setting. I changed the default sds voltage from 72 to 115 but it's still slow and increasing the frequency from 60 to 65 did not get it working right either.

Am I doing something wrong or does the SDS not work with this TT
radioheadokplayer

Showing 4 responses by stanwal

Call or email VPI and see if they have had experience with this combination. I am currently using an SDS on a non VPI table; a look at members systems will show that some others are also. But each table has its own characteristics.
I should have thought of that, the Classic has to have a capacitor changed to prevent a loud pop or to use the SDS. On the Classic it was very easy, I have never has a Townsend so don't know. I suspect it is not too hard. On the Classic the cap is in the AC line attached with wire nuts [ wire nuts ARE NOT those members given to buying $2000 ICs and $3500 PCs, but I digress]. Try to take the bottom cover [if it has one] off and see if you can see a cap. Unplugged of course.
You have to do this in order to use the Classic with the SDS, a really stunning design failure on the part of VPI in my opinion. It is not in the motor itself but wired into the AC line. The Classic is also prone to making a loud pop when turned on requiring the same capacitor to be changed. They did not inform the dealers of this problem, I had to email them to find out about it.
My SDS will work with my Basis 2001 at 33 but the table will not rotate at all when I switch to 45. I get the correct speed by switching the belt. Speed is accurate at both 33 and 45.