update still waiting on the plating shop, so in the mean while, here are some photos of the tuning clutch getting a new rubber pad for this task i used part of an inner tube, sanded it smooth then glued it to the assembly with contact cement, you can't use rubber cement for this task (i tried), rubber cement only seems to work when it's rubber to rubber, it peels off the aluminum very clean and easy contact cement seems to hold more like original
the clutch serves two purposes in the tuning assembly, one is to allow the tuning knob to slip if you try to turn it past the end of the mechanism limits, the knob is worm gear driven so you would have insufficient feedback before things got a lot of forces applied the second purpose is that it has a dis-engagement lever used when any of the tuning buttons are depressed, the first part of travel of a button opens the clutch before the final travel meets with two parallel rods to swing the tuning core guide bar.
for interest sake i included a photo of three button assemblies side by side with with different parts of the AM band programmed into them this is where the "memory" of a tuned station is stored in the radio these buttons have both ends and the center of the AM band stored via the half round disk that can swing to any angle. when a button is pulled out, that tiny disk can float free, as you push it back in, it hugs the two parallel tuning bars that rotate around a mid point the disk rotates to match the position of the two parallel bars perfectly as you press the button back in for programming, then on final travel of the programming action a lever pinches this half disk to clamp it firmly into position to remember the station.
