2. analog
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VTF measurments with a unipivot

I understand the VTF changes depending on the vertical position of a unipivot tonearm, and which way (up or down) in turn depends on the type of the unipivot (center of gravity in relation to the pivot point).

Can anyone clarify how the VTF changes in the VPI tonearms, specifically the Classic tonearm, i.e., whether the VTF increases or decreases as the tonearm is lowered? Thank you.
actusreus

Showing 2 responses by rauliruegas

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rauliruegas
12,779 posts
 
Dear Actusreus : Cartridge set up always is important and critical to have a good quality performance level from the cartridge.

Now, IMHO it's almost useless to ask for the penultimate VTF set up in a cartridge/tonearm set up due that that " perfect " VTF set up never works ( not only because there are different thickness in the LPs. ) because each single LP is not perfectly flat so almost at each " groove " VTF changes " like it or not ".

Good that you are interested in " perfect " VTF but this does not works during playback and that's why cartridge manufacturers give us a VTF cartridge range. Normally I made my cartridge VTF set up at the middle of that range or a little over it.

regards and enjoy the music,
R.
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rauliruegas
12,779 posts
 
Dear Actusreus: Normaly the cartridge manufacturer/designer as J.Carr makes the advise on VTF where the cartridge coils are centered and is a good trend try to be there. As I posted I try to make the set up at the middle of the cartridge VTF range after the other cartridge set up parameters.

As you said we can't stay changing the VTF every single LP and not only because " boring " but everytime we change VTF we have to adjust VTA/SRA and sometimes azymuth too.

We have to find out an average cartridge set up, IMHO these are the kind of trade-offs that we have to accept with an imperfect medium as analog.

regards and enjoy the music,
R.
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