On a vaguely related note...
Many moon ago a local radio station moved their AM transmitter site and took the big money option. New antenna, blockhouse, transmitter, took very little from the old site. Friend of mine was the CE at the time. Called me on the phone and told me where the old site was located, back door unlocked, I was invited to haul out anything that tickled my fancy.
Ten kay-dub Western Electric ether heater of 60's vintage with tons of spare tubes from both the TX and studio equipment.
I hauled out something like six or seven car loads of junque and some of the parts were very interesting. Ceramic variable link coupling coils (coil within a coil, looks like a gimbal mount, sometimes called a Goniometer) big, big, big oil filled HV caps, w-i-d-e spaced variable caps and the mother of all HV variable capacitors.... Visualize a 200 pf beastie slightly larger than an R-390 (I kid you not), reduction gear drive, white ceramic tuning shaft about 18" long with doughnut sized ceramic insulators as feet. It was a very impressive piece.
I hauled it down to Dallas for the First Saturday Sale as a "make offer" item and no one bought it. Didn't want to haul it back home so I gave it to a friend that ran a surplus house I'd frequented for years. The deal was that if he could find a good home for it please do, otherwise I'd haul it off next month if he wanted his floor space back. If he could turn a fast buck on it that was very OK 'cuz when I give something away it's no longer mine. It's your beast now, your call, have lunch on me.
Did I mention the capacitor weighed about 60 pounds and was 100% solid cast brass, both rotor and stator?
Never crossed my mind while I had it, but after a few weeks he took it to a metals recycling place. Never did hear how much he got for it but there was no complaint about how things worked out..................