Which cart works with Ortofon AS309S 12inch arm

I suggest not going with the AT33PTG for the AS309 arm as the arm is relatively high mass (>20 grams) and the AT33PTG is high compliance cartridge (40X10-6cm/dyne) giving you a resonance frequency of <6 Hz.
I know there's a few guys here with the same arm on their Ravens so hopefully they can chime in.

Dear Fld: Any of the one you have in " line up " can work fine. Due to a removable headshell design that tonearm is " cartridge friendly ".

Btw, Jaspert that compliance figure/spec you take it is the static compliance not the cartridge dynamic compliance that is the one you need to make those calculations.

In the other side, IMHO those frequency resonance calculations can't say it which quality performance level can/could have any cartridge/tonearm combination. So it is almost useless.

Here you can read facts on that subject:

http://forums.audiogon.com/cgi-bin/fr.pl?eanlg&1265063971&openflup&6&4

and if you need other than me experience then here coming from an Audio magazine review on the Ortofon MC-2000 mated with the Technics EPA-A250:

http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1200430667&openflup&1612&4#1612

regards and enjoy the music,
Raul.

The 309S can hold up to 25grams (cart + headshell weight) otherwise, you need a heavier counter weight which is also available from them. Need to check the headshell weight. Ortofon has 13.5-16.8 grams to match with your carts.