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VPI VTA Base question

Does anyone know how to tell the difference between VPI's current JMW VTA base, and the 12" Unipivot Base?  Something visual? Or measurements? 

I can't achieve the proper alignment with my 10" Fatboy arm and want to make sure I got the correct base.

 

markpao
wlutke
727 posts
 

I see you replaced an “original” jmw 10” arm. If you are using the vpi jig for that arm it’s for a p2s of 250 mm and a true 10” arm. The fatboy 10” is actually 10.5”. Could that explain your situation?

markpao OP
519 posts
 

My alignment results are from a brand new VPI 10" jig I just ordered along with my new arm and base. 

testpilot
949 posts
 

What cartridge are you using?  Some long body cartridges can be problematic. 

markpao OP
519 posts
 

Dynavector XX2 mkII

Supposed to be a popular match with the Fatboy

boothroyd
365 posts
 

@markpao , excellent cartridge 👍

Sorry to be redundant but the best way to know if you have the correct base is to measure/confirm the actual Pivot of the tonearm (not it’s offset mount) is 258mm from center of platter Spindle.

Since you’ve measured/confirmed 258 P2S then you either have 1.) the wrong protractor or 2.) a too long out of spec armtube.

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