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VPI Scout - slow speed , help ?

Hi

I've recently purchased a KAB speed strobe which has indicated that my Scout is running very slow (notches moving counter clockwise); over 100 notches in 60 seconds.

I have the newer black belt with unknown time on it; I've cleaned the belt, motor grooves and platter grooves. I get power from a dedicated 15amp plug, through an Audience AR-6 conditioner and stock power cord to the motor. I've tried using different notches on the upgraded 300 rpm motor pulley, with little effect.

I suppose the cheapest experiment is to buy a new belt, and lube the spindle bearing (for which I'll have to purchase oil) and see if that changes things. Short of buying the VPI SDS, are there any other actions which may help here for little money? Perhaps a used Variac would essentially do what the SDS does?

Your constructive feedback is appreciated.

Regards,

Bryn
bshapperd
Post removed 
mofimadness's avatar
mofimadness
5,310 posts
 
I agree with Liz. Below is a link to print out a basic, manual strobe disc. Try this first and see if you are off any.

http://www.vinylengine.com/strobe-discs.shtml
mofimadness's avatar
mofimadness
5,310 posts
 
Sorry, this link is clickable:

http://www.vinylengine.com/strobe-discs.shtml
jazzgene
145 posts
 
That is way off. Do you have the motor positioned properly?

Do you have a test record with say a 3khz tone? Use a frequency counter and check.

If music is in tune, the strobe is defective. I have the KAB and they are usually dead on, though.
bshapperd OP
84 posts
 
Well, I think I've just discovered some major power fluctuations in my 'hood!

With the motor positioned correctly, I tried Elizabeth's trick; I counted 103 1/3rd rotations in 3 minutes. I tried the KAB again and it was reading fast (????)!

My assumption now would be that the power to my home fluctuates greatly throughout the day? We have a new 200 amp panel, new wiring and a dedicated line to the TT. How do I check voltage from the wall socket; can I do this with a multimeter?

B
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