I just bought a new Rega RB330 tonearm for my Systemdek IIX, replacing the stock Profile II tonearm.
I understand I need 222mm from the center of the tonearm mounting base to the spindle. Inserting the Rega tonearm in the stock tonearm board I am unable to get 222mm.
Do I need to cut a new tonearm board then drill and mount the new arm?
Does the thickness of the tonearm board matter? I would think yes for VTA. The stock board is 3/8”.
What’s the best way to ensure I get the 222mm from the spindle to the center of the tonearm base?
Thanks!
I understand I need 222mm from the center of the tonearm mounting base to the spindle. Inserting the Rega tonearm in the stock tonearm board I am unable to get 222mm.
Do I need to cut a new tonearm board then drill and mount the new arm?
Does the thickness of the tonearm board matter? I would think yes for VTA. The stock board is 3/8”.
What’s the best way to ensure I get the 222mm from the spindle to the center of the tonearm base?
Thanks!
Attachments
Yes, the pivot-bearing distance must be 222mm for proper alignment. Use a steel ruler for best results.
https://www.amazon.com/Mr-Machinist...ruler&qid=1617221951&s=office-products&sr=1-6
If you are lucky the height won't be a problem, but it's possible.
https://www.amazon.com/Mr-Machinist...ruler&qid=1617221951&s=office-products&sr=1-6
If you are lucky the height won't be a problem, but it's possible.
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Would there be some room to compensate for pivot to spindle distance error by moving the cartridge in the headshell mounting slots?
I suppose it depends on the size of the error.
I suppose it depends on the size of the error.
The tracking error across the playing radius will be different than designed, if the distance between
the horizontal pivot and the spindle is not 222mm. (This arm is likely optimized for Baerwald alignment.)
The zero points would be shifted, and the magnitude of the tracking error vs radius would also change.
The original Profile II arm used 210mm mounting distance, rather than 222mm.
the horizontal pivot and the spindle is not 222mm. (This arm is likely optimized for Baerwald alignment.)
The zero points would be shifted, and the magnitude of the tracking error vs radius would also change.
The original Profile II arm used 210mm mounting distance, rather than 222mm.
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That's a big P2S difference sure enough.
P.S. I'm out when it comes to talking about the different cartridge alignment methods! 🙂
P.S. I'm out when it comes to talking about the different cartridge alignment methods! 🙂
So the old tonearm board thickness is 9.55mm, the new board I made is 11.70mm. I am going to have issues with VTA?
Probably thinner is better so I can shim later, can’t really take material off if it’s too thick.
Probably thinner is better so I can shim later, can’t really take material off if it’s too thick.
Depends partly on if there was extra leeway in the old arm base. Bear in mind that, besides the mounting
board thickness, different arms will have different height adjustment ranges, even on the same board.
Think I would modify the existing mounting board so you can try the new arm on it, and see if there is
adequate height range available. Then you will have an idea of a suitable thickness for the new board.
board thickness, different arms will have different height adjustment ranges, even on the same board.
Think I would modify the existing mounting board so you can try the new arm on it, and see if there is
adequate height range available. Then you will have an idea of a suitable thickness for the new board.
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Sorry I don’t think I follow
As far as I know the old arm, the Profile II did not have an vertical adjustment. It was designed for the Systemdek IIX so it’s hight matched the table.
I don’t believe the Rega RB330 has an vertical adjustment abilities.
As far as I know the old arm, the Profile II did not have an vertical adjustment. It was designed for the Systemdek IIX so it’s hight matched the table.
I don’t believe the Rega RB330 has an vertical adjustment abilities.
Take a look at this, and the link in the article.
How to Use a USB Digital Microscope to set 92 Degree Stylus Rake Angle (SRA) | Analog Planet
How to Use a USB Digital Microscope to set 92 Degree Stylus Rake Angle (SRA) | Analog Planet
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