NW-Bound
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
- Joined
- Jul 3, 2008
- Messages
- 35,712
In olden days there were battery operated valve, tube radios.
They used "A" and "B" batteries. A for filament, B for plate voltages.
There you have it, I scraped rust off of some brain cells.
The battery-operated vacuum-tube radios were before my time.
However, I recall seeing portable military radios that ran off battery packs. Lots of zinc-carbon cells to run these radios.