Thanks for all the help everyone. With some help from Gary Stork at
www.thevoiceofmusic.com , we identified the replacement cartridge as the EV88. I will also remove the platter to get a closer look at the grommets and get an order together. Gary did say the cartridge is NOS - but the units he sells have been voltage tested. He does admit that these and ceramics will not last forever. At this point I can live with that for the price - especially since I am sure the needle itself definitely needs replacement in any case.
For the DC dropping resistor in series with a new silicon diode, I was going to use a 100-ohm 5 watt unit. Does that sound OK? Would I still need that wound brown ballast resistor?
Yes on the AC side the 90 volt motor does function as a dropping resistor for the tube filament voltage. IIRC I measured between 25 and 26 VAC on the filament voltage so that looks OK.
I also remember that the motor ran quite hot. I assume that is because it still needs the standard servicing/lube. Does that sound right or is there something else I need to look out for?
Does anyone know anything about the manufacturer? I was not able to find out anything. Is there any sort of "generic" schematic or serivce info for these one tube phonographs? If I can draw up a schematic competently I'll post it.
Jimmy