3 ms·
What are the cylindrical metal things on the wall panel in the "1940's teletypes" picture? Is it capacitors? I see those often in similar old photos, but nothi
by Aardwolf 11y ago
What are the cylindrical metal things on the wall panel in the "1940's teletypes" picture? Is it capacitors?
I see those often in similar old photos, but nothing in modern electronics looks like that afaik so I wonder :)
- Maakuth 11y agoI have extremely limited knowledge of this subject, but I think they could be transformer coils. For long haul lines one would want to have higher voltage to keep resistance loss at bay.
- david-given 11y agoThey're probably thermionic tubes, a.k.a. valves. You want them accessible so you can replace them, but they're also fragile so you put cases over them so you don't bump them.