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How do YOU find the hole?

I need to drill two armboards for arms that aren't commercially popular. What method / tools have you folks used to find the proper location to drill the hole to mount the arm in the armboard? Obviously, i'm looking for the most accurate method that is the simplest and costs the least : ) Sean
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PS... I'm only kidding. I'd rather spend the money to do it right than to hodge-podge together something that will chew up records and spit them out :(
sean
lugnut
1,190 posts
 
If you could post the arm part number then maybe someone has the spindle to arm pillar required dimension.
jameswei
883 posts
 
Sorry I'm so late to this thread. I had to go back and look up my Graham arm instructions from 1996. I recall reading about two positions. The Seagrave/Baerwald position optimizes performance near the outer edge and inner grooves. The Loefgren position optimizes in the mid grooves. (I couldn't find these on Google. Maybe the Graham site used to post a white paper that he would be willing to email?) Most people choose the former. The actual difference in position between the two is so small (1/8"?) that I personally wouldn't attempt any of this without a template. Good luck.
sean OP
6,231 posts
 
I was able to find the info that i needed on one arm, but not on the other ( so far ). Since it is an OEM Pioneer arm off of a vintage table, i don't know if i'll ever be able to find it. I do appreciate the responses and suggestions though. Sean
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johnnantais
621 posts
 
You are welcome, Sean, and good luck on the other arm. Which Pioneer 'table is it? I may have one, providing it is a PL12D, and will simply measure the tonearm-to-pivot distance from the 'table itself.
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