Antique radios, Old Time Radios
2B4
|
Country:
United States of America (USA)
|
|
| Identical to |
2B4
|
| Similar
Tubes |
Normally replaceable-slightly different:
885
Other base and other heater:
6Q5G
|
| First Source
(s) |
02.Jan.1943 : Electron Tube Registration List rec. 315
|
| Base |
UY-Base, 5 Pins (USA, April 1927)
|
| Was used by |
Technology / Measurement |
| Filament |
Vf 2.5 Volts / If 1.4 Ampere / Indirect |
| Description |
Thyratron designed to operate as sawtooth generator in the timebase of oscilloscope instruments.
Similar to 885, registered to RCA about two years later.
|
| Information source |
- - Manufacturers Literature
|
|
|
 |
|
2B4: Tabu Röhren-Codex, 1948
Anonymous 15 Collector
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| |
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2B4: Manufacturer's Literature
Emilio Ciardiello
|
from Just Qvigstad
|
|
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1
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