Hallicrafters T-506 scored

[Sam Cogley]

Originally Posted by bandersen

Yep, they made TVs from 1948-1958

http://www.tvhistory.tv/1946-49-HALLICRAFTERS.htm
http://www.tvhistory.tv/1950-59-HALLICRAFTERS.htm

Thanks for the tip about cleaning the knobs.
Bob

Even with that stuff, it's going to take a lot of elbow grease to get rid of it, and it will probably come back a time or two, though in lesser concentration. I got to the point where rubbing the crud down with the cleaner, then attacking it with a bristle brush in my Dremel was the only way I could cope with it.

[Phil Nelson]

Maybe that is one of the dreaded soy plastics that seem to keep breaking down, more or less, no matter what's done.

A couple of days ago, I heard an ocean scientist talking about modern plastic and how water creatures get sick from eating it. He noted that we have known how to make more degradable soy-based plastic since the 1930s.

"Damn straight," I said, "and I've got the rotting radio knobs in my workshop to prove it!"

Your knobs still have the original shape. As a last resort, if they continue to deteriorate, you could use one to make a model and then cast acrylic repros.

Phil