The dial on the right sets the resistance in Megaohm as far as I can read. If I see that correctly its the printing plate for manual for an old X-Ray machine. Only those kathode tubes (at the bottom) would akquire such high voltage (200V)
“What is this thing I inherited from my grandparents? What I know is that it’s Scandinavian, over 40 years old, made of glass, spoon-shaped, hollow, and about 1m tall.”
“It was used to heat portions of food in the olden days.”
The dial on the right sets the resistance in Megaohm as far as I can read. If I see that correctly its the printing plate for manual for an old X-Ray machine. Only those kathode tubes (at the bottom) would akquire such high voltage (200V)
Not so much as a stamp, as a printing plate. Before ink jet printers, they would ink these up, and press paper against them.
The dial on the right sets the resistance in Megaohm as far as I can read. If I see that correctly its the printing plate for manual for an old X-Ray machine. Only those kathode tubes (at the bottom) would akquire such high voltage (200V)