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where to install a tonearm

Hi, Until today I always thought that all that I need to set up a tonearm is to use a protractor to find the "pivot to splidle" distance and that's it. If I want I can draw an arc with this information and I can install it anywhere in that arc.
I have a Lustre GST-801 to install and in the manual found that besides showing you the correct distances, they include 2 more measurements: they draw a line that goes from the center pivot up to the point when it connects with the extension of the horizontal line of the spindle (basically where both lines meet in a 90 degrees angle). in the Lustre, those distances 199mm (horizontal) and 105mm (vertical). If I take this into consideration the arm will be too close to the platter (my TT has a peripherial ring) and that's not practical for me.
knowing that a platter is round I always though that we can install the arm anywhere in the arc line that I mentioned before ... am I correct?, am I wrong?, please help me with this, Im really confused.
jorsan

Showing 2 responses by john_gordon

john_gordon
116 posts
 
Hi Nikola
Lefthanders can always try switching the arm fingerlift to the other side of the headshell making it easier to use an arm mounted on the right hand side of the deck. (Always assuming the fingerlift is detachable).

John
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john_gordon
116 posts
 
In theory you can install an arm anywhere on the P2S arc and in any orientation as long as it can track the record. The manufacturer's recommended mounting distance for the 801 is 225mm. The figures 199 and 105 are just the sides of a triangle giving 225.

But mounting is turntable dependent.

Some considerations re possible locations might include if the arm will foul some part of the deck when it moves, or if it is awkward to use in a particular orientation, or if the cartridge is affected by approaching the motor, or if any suspension is adversely affected, or if the antiskate mechanism is compromised, or even if it looks a bit weird, or...

Specs on the arm at VE here.

John
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