[ohohyodafarted]

Question????? Is there any reason you can see which would prevent someone from using a replica shaft made from either a hard plastic or fiberglass rod?

The reason I ask, is that I also have a SC TV-10 with a broken shaft. I have the ability to machine a replica shaft in my machine shop. I feel that it would be a better route to take than trying to paste the ceramic shaft back together.

But I would like your opinions about alternative materials to the original ceramic material that was used. I cant imaging why they used ceramic; it is so fragile. I realize metal is not suitable as it would most likely interfere with the electrical properties and tuning action, however there were other alternatives to ceramic when these were being manufactured. For the life of me I cant imagine why they would use such a fragile and brittle material when plastics and phenolic were available. Cant be for thermal stability. The bobbins appear to free to float laterally on the shaft.

I does not appear that the tuning bobbins need to slide on the shaft laterally during the tuning action. It appears that the keyway in the ceramic shaft is evidently keyed to the hole in the tuning bobbin. Do the tuning bobbins slide laterally on the ceramic shaft????

And if I was to try and repair the original shaft, I would machine a non-metalic coupling to "splice" the shaft using JB Weld as the bonding agent. Glue alone is not strong enough to make a lasting repair. It also needs a mechanical splice to reinforce the broken area.

Thanks for any input you may have RE: making a replica shaft out of a different material.