2. analog
  3. 1274318732

Ortofon A90 with Graham Phantom

Looking at the top of this cartridge there are 3 little tabs. One at the front and 2 at the back. The top of the cartridge does not make contact with the headshell on its entire surface. Also, with the Graham, the cartridge is further back in the slots for correct alignment making one of the tabs at the back not make contact at all with the headshell.

After aligning it with my Mint LP and securing the screws, viewing the cartridge from the front, i can see a small gap between the top of the cartridge and the headshell and the cartridge is "tilted" ever so slightly to one side because only 2 of the tabs are making contact with the headshell.

Are you experiencing the same?
Thanks
smoffatt

Showing 2 responses by tuboo

tuboo
93 posts
 
The solution is easy.
use a 2.5 mm square spacer which supports the three tabs at the A90. ofcourse the VTA needs to compensate for the 2.5 mm thickness.
you may use aluminum, brass, or ebony.
the downside is one of those materials will sound best in your situation so you have yet another parameter to tune.
the three tabs on the A90 just fit fine with the Airline, but not much space left here either.

very tempting to comment on the dremel tool 'advise'..
tuboo
93 posts
 
Downunder,
there are several screw lenghts supplied with the A90 package, but seeing the Phantom headshell thickness the 2.5mm extra spacer could be too large indeed.
the screws are metric 2.5 millimeter or M2.5 although they are easily obtainable in EU that might not be the case in USA.
but for sure you will find a supplier of metric nuts&bolts online who could send out those screws to you.
i can give you dimensions on the spacer to fabricate one yourself. the 2.5mm thickness is a suggestion, that could be 2mm but no less due to resonance. be sure to use non magnetic screws like rustfree steel, aluminium or brass.
More to discover