3 ms·
https://en.wikipedia.org/wiki/Vacuum_tube_battery https://en.wikipedia.org/wiki/Vacuum_tube_battery Up to 120VDC early on
by h2odragon 4y ago
https://en.wikipedia.org/wiki/Vacuum_tube_battery https://en.wikipedia.org/wiki/Vacuum_tube_battery
Up to 120VDC early on