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 Post subject: Radiola 33 metal case
PostPosted: Feb Fri 09, 2018 2:32 pm 

Joined: Apr Thu 13, 2017 11:22 pm
Posts: 42
Location: Cleveland, Ohio 44102
I have a Radiola 33 with a slightly warped pot metal rim on the lid. i am considering heating it with a heat gun, on a flat surface, and trying to gently push the warp out of it.
If the heat gun does not work, I'm thinking a plumbers torch. I do know pot metal can turn into molten metal when it gets too hot. The lid is too big for my oven.
Anybody been in this territory before?

 Post subject: Re: Radiola 33 metal case
PostPosted: Feb Fri 09, 2018 4:49 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 11785
Location: S. Dartmouth MA 02748-1225 USA
Do not do anything to the pot metal...

The structure of the metal has changed over the years. There is trapped moisture as well as expansion, heating can result in the casting, if not popping pieces violently or simply crumbling. It cannot be bent, it is as brittle as pottery. Cannot be conventionally drilled or tapped.

The only recourse I have had with the material is to find an example that has not bent or distorted over the years.

Radiola 33 trim, since it does not have to have superior structural properties is a good candidate for 3D modeling. Using a light gray (pewter color) plastic as the base the engravings filled with Van Dyke brown toner and the exterior sanded smooth. The peened bits that secure the pieces can be plastic bosses that can be melted over to secure...



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