ok, so it seems the types/variation of the type and size of the arm block center material of AR arm is not significant, so I have another issue.
I have swapped out the stock tube with technics. successful. works great, but am now having to finalize it all.
1 - where to secure the tube (theres about half inch play where I can lock it down),
2nd, I need to choose a spindle to pivot (i'd like to use 222m if possible,) and then
3rd,I need to determine the overhang. Not sure how that is determiend, is it a function of the spindle to pivot? etc
snfrosten wrote:Spindle to pivot on the AR XA arm is 211mm center to center, 15mm overhang. Replacing the Delrin pivot sleeve with sapphire bearings would improve the clarity and definition in the top end plus better vertical tracking ability.
not sure if those figures apply to stock ar arm or the one that is replaced by a technics (as I just did)?
here is a pic of three arms/ from left to right is rather modern AR XB (it does not have the back end bend, the other two have fwiw), and the middle is from an old 2 motor AR XA. The arm on right, in use is technics. I had some liberty (about half inch) as to where I wanted to mount the arm itself in the AR center pivot assembly and looking around the web gives differing ideas as to what a technics arm on AR pivot assembly should be> 212 pivot to spidnle with 15mm overhang seems common.
The arm here is used on an isolated arm pod and on a Lenco and dual. I assume the spindle to pivot is the same regardless of what table it is used on? Still confused about why any certain arm needs to be a certain spindle to pivot. Why can't I just use the common rega/jelco 222m and the same overhang they use?
Which is basically what I am doing, using 222mm with about 15mm overhang. I then just adjust offset by eye/ear//// I then move the armpod around a bit to see what it does to the sound which is interesting, and i do end up liking the 222mm a bit better than what I believe is the concnensus on a technics arm tube on ar arm which should be 210mm. I'ts all confusing, but if I can use the AR arm components, with technics tube - at 222mm spindle to pivot, and whatever overhang is appropriate, that would be great. could anyone validate that usage scenario? disregard the headshell twist, as I have no problem doing that by eye/ear. thanks for any ideas