Hexagonal spanner for Fidelity Research FR 66S tonearm

Thanks, I have been able to remove armboard so space may not be an issue.

So sorry. I just tried to gauge the size of the hexagonal nut that does fix my FR64S to the armboard, and I can barely see it without dismantling it, which I am loathe to do. The only thing I can say is that it IS hexagonal, as you say, But if you've got your armboard off the TT, then you will have no trouble determining the size of the nut. It's probably metric and seems to be at least 27mm.

you might pass this on to whom you sell it to

"

thuchan

1,009 posts

04-21-2013 at 12:29am 

Pani,
in the case of the FR-66s you may neglect the compliance issue. We made many tests with nearly all available MC carts, MI carts and new as well older MM designs on the FR-66s. No problem at all. It is the most universal arm ever built."

from this discussion of the 66S here

https://forum.audiogon.com/discussions/question-on-fr-66s

I apologize ahead of time for the bald spot you might make scratching your head trying to ascertain what's 'best'.

this one has a heavy weight with two flat spots for a tool to tighten/loosen

this one has a hex nut

someone could have changed it, I had to buy a nut for one of my friends Micro Seiki 505's. 

You have the arm board loose, take it with you to a great hardware store.

this heavy ring has no flat spots, it has two holes, you temporarily put a rod in the hole and tighten it with the rod. Note, you want a washer below the board, above the heavy ring. Scroll up, the top ring with flat spots also has a hole so it can be tightened/loosened by that method also, in case a tool won't fit.

My prior undisputed favorite arm, very unique magnetically controlled Acos Lustre GST-801 (I got with help choosing and finding from members here).

I like my restored JVC Victor UA-7082 equally, and it has the advantage of being 11-1/8" effective length, so it’s my new favorite. Both have removable headshells.