Again, cartridges which work with that arm are also rare, antique. The changer is not an easy one to repair, as it's complex compared to average. Again, got to hunt eBay. Big issue is crystal cartridges and many older ceramics are getting scarce from that era, and also there's high risk of dead ones. You might want to go cruise Antique Radio Forums for help, because this is not a normal AudioKarma type turntable, being that this is an antique changer. It's outside most AK expertise. If you don't own repair manuals, I'd cruise eBay as the Sams has been listed, you need that manual.