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What angle should I set the VTA on my VPI turntable?

I can't believe after all these years, I am asking such a basic "analogue 101" question, but here it goes. I own a VPI turntable that has a "VTA on the fly" knob.  I thought the best VTA setting was for the arm to be 100% parallel to the record surface.  

However, based on some research, I am not so sure that is correct way to set the arm to achieve optimal VTA and correlatively, optimal SRA.  Not sure, ... but I think I have to raise the pivot side of the arm.

Any advice would be appreciated. 

Thanks.     
bifwynne
lewm
14,684 posts
 
Dear lutke, I don’t know about your model, but throw it out. Now think that you and a friend are carrying a sofa. On level ground, the burden is equally shared. Now you have to carry the sofa up a staircase. Who is working harder? The guy at the top end or the guy at the bottom end? Raising the pivot point shifts the center of gravity toward the stylus. VTF goes up.
wlutke
757 posts
 
lewm,
Rest the stylus on the platter at 0 grams. Lower the pivot point. I guarantee the pressure will increase. Raise the pivot point and it will loose contact with the platter. VTF is set with the scale at record level because setting above the record height (tail down) will give a false heavy reading up to .25 gm. on some scales.
lewm
14,684 posts
 
Your model is flawed.
wlutke
757 posts
 
I've done the work, taken the measurements.  Nuh-uh is not a rebuttal.  Show me.
slaw's avatar
slaw
26,515 posts
 
OP,

I mentioned my specific cartridge for a reason.

I know the Delos set-up is super sensitive, don't know about Kleos
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