2. analog
  3. 1309722499

Graham Phantom II 12" - dimensions and overhang

Hello guys,

I come from Europe and recently purchased Graham Phantom II tonearm with 12" armwand.I was missing specs for 12" armwand (in manual are specs for 9" and 10"),so I emailed to Bob Graham and asked him for specs for 12" version. The answer was,that 12" version should be adjusted same as SME V 12". Bob sent me document with SME dimensions as well.

So regarding this document specs are Leff 308,8, overhang 13,2, mounting distance ( Pivot-Spindle) 295,6.
To adjust mounting distance is easy using any quality protractor. I used Acoustic Solid.

http://www.acoustic-solid.de/html/schablone.html

So with mounting distance adjusted to 295,6,here comes the thing.
I should set overhang to 13,2 regarding to specs for SME V 12",but simply
elko

Showing 2 responses by elko

elko OP
3 posts
 
I wrote it to thread 12 inch Graham Phantom
elko OP
3 posts
 
But that is the thing,that these specs,which Bob sent me,does not work with me.
When I adjust mounting distance to 295,6mm,I simply cant make overhang 13,2mm. 13,2mm overhang is for Baerwald scheme.

I am getting around 16mm and than screw,which is holding cartridge in headshell hits the inner edge of headshell and I cant move cartridge anymore.
It seems to me,that Leff is bigger than 308,8. I made some calculation for Baerwald scheme and what can work with me is this:

Leff 313
Mounting distance 300
Overhang 13
Offset angle 17,37

With these numbers,I will be able to adjust cartridge in headshell correctlly.
More to discover