He can fill in the details of the cartridge and we settled on a 1:20 step-up and a 15 ohms source feedign a 60 ohm load. as sent they will have about 500mhy's of inductance with a 9X9 stacking. This is on the bigger 80% nickel core that the c3 guys preferred. The frequency plot is attached below. Loading this with 22K to net the desired 60 ohm load did little to the frequency response so i didn't bother plotting it since i have presents to wrap
dave