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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 radioheadokplayer

radioheadokplayer OP
181 posts
 
I emailed VPI based on that good suggestion here.

VPI responded:

Check the capacitor on your motor, if it is less than .68 microfarads you need to change it for a .68.  Less than that value and the SDS looks at it like it is a short.

MY Question now is how easy is it to change capacitors on a turntable motor?

Thanks

Mike
radioheadokplayer OP
181 posts
 
I have never heard of needing to open the motor of the turntable and replace a part to be able to use an external motor controller. I am going to contact Townshend regarding the ease and viability of doing so?
radioheadokplayer OP
181 posts
 
Mees,

thanks for the suggestion. Once the SDS began to drive it, did you find that SDS maintained accurate speed for the TT at both 33 and 45rpm?

Mike
radioheadokplayer OP
181 posts
 
I had no luck with the "gentle shove" method with a 45rpm record. My turntable dealer is checking with the manufacturer if the capacitor can be readily changed on the motor to .68 as suggested by VPI
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