On 14/01/2019 21:20, Fredxx wrote:
On 14/01/2019 20:27, mm0fmf wrote:
On 14/01/2019 07:12, D.M. Procida wrote:
I bought a lightbulb (and a ceramic holder and rotary lightswitch) in a
second-hand shop yesterday. They had many beautiful items taken from an
old electronics teaching laboratory - all brass, steel, ceramic and
wood.

The lightbulb:
https://www.dropbox.com/s/qw0vnqdtvemf0ld/lightbulb.jpg?dl=0.

It's about 10cm tall, and has an Edison screw. The filament loops up and
down the bulb in six lengths. It's made by Osram, but there are o other
readable markings on it.

Any idea what the purpose of a lightbulb like this might be?

I'm tempted to run it at low voltage to see what it looks like
illuminated, but I'd hate to damage the filament.

Daniele


It's a Cathermin tube with an indium complex of +4.

Used in an Interocitor.

One presumes you must be old enough to recall the film "This Island Earth"?

One of best, if not the best, 1950's SF film. It's fun and entertaining
whilst films like The Day The Earth Stood Still are too serious. The
original is excellent and the MST3000 skit is priceless.

Use your intensifier disk on YouTube to enjoy it if you don't have it on
DVD. ;-)