Tim Shoppa wrote:
On Apr 11, 7:10 am, "N_Cook" wrote:
Another old piece of kit this week. Steel case with a bakelite closure that
was a devil to separate. Metal not rusted and I'm assuming steel does not
shrink over decades.

I have found that many of the pot metal castings used for metal parts
on old radios, turntables, etc. have expanded over time.

I was astonished to learn that metal can do that in a timescale
measured in decades.

Oh, yeah. I've got an old Philips bakelite radio that has one of those
schemes where the tuning and volume are on the same shaft. The metal
used in the construction of this gizmo has expanded enough that the
tuning only moves as far as the volume control, and turning either one
makes both of them move. I can't even extract the chassis to try to fix
this because the knob is literally fused to the shaft from the
expansion. I haven't figured out how I'm going to deal with that yet, so
the set is a shelf queen.

-Scott