[EdKozk2]

I came across this old thread, which I never read until after I repaired a broken ceramic shaft inductuner. I picked up a Crosley 9-407 at the 2018 ETF auction. The tuner was missing the three coil ceramic shaft. I just happened to have a stripped down Dumont RA-103 chassis Tom Carlson gave me in 2017. Luckily the broken coil shaft and parts were still in the tuner.
I used a solid 0.312 fiberglass rod. I cut it from a driveway reflector,that I bought at the local hardware store. Just under 6 inches is all that was needed.
If anyone wants to replace a broken ceramic shaft in an inductuner , pay close attention to the direction and placement of the coils. The front two coils go one direction, and the rear RF coil is going/ wound opposite. I also had to drill a pin hole where the fiberglass shaft slides into tuner shaft. The old broken ceramic shaft had to be drilled out using a masonary bit. I assembled all the coils and shaft with the tuning control turned fully CW to the end of its' rotation. After I got everything back in place I glued the coils to the shaft. If you do use glue make sure to keep it off the metal contact rings/ washers at the end of the coils. I didn't have to make any adjustments to the tuner when I was done. The FM and TV signals came in fine.
Ed