90 dial drive mechanism repair - Printable Version

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+--- Thread: 90 dial drive mechanism repair (/showthread.php?tid=116)

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90 dial drive mechanism repair - Tim Tress - 12-01-2005

The 90 that I'm working on has a very sloppy dial drive mechanism; the shaft has a little slot worn in it, and the matching hole in its bracket is worn, too. I have some ideas from old posts on the ARF, but I thoght that I would ask here.

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- Tim Tress - 12-05-2005

I fixed it; I found an old hollow tuning shaft (to use as a bushing) in my assorted junk (probably a shaft from one of those late 40s Zenith sets), which had a quarter-inch I.D. I slid it over the tuning shaft, and carefully centered the shaft over the original hole. I used a fine-point Sharpie marker to draw a circle around the new bushing, and reamed/filed the bracket to the diameter of the bushing. I then pressed it into place and soldered it, trimming the new bushing to about one-quarter inch or so. The dial was then reassembled, and the mechanism was oiled. It now works perfectly, and should be good for another 74 years.

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- Chuck Schwark - 12-05-2005

Hey Tim, don't leave us in suspense....

Could you add some pictures please?

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