Antique radios, Old Time Radios
3B/850A
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Country:
Great Britain (UK)
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| Identical to |
3B/850A
= 4242A
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| Similar
Tubes |
Normally replaceable-slightly different:
242A
; M-4242A
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| Base |
Jumbo 4-pin bayonet (1918)
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| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 10 Volts / If 3.25 Ampere / Direct |
| Description |
STC proprietary code for 4242A transmitting triode. Thoriated-tungsten filament, 85 W plate power dissipation, 6 MHz full ratings.
Equivalent to 242A.
|
Dimensions (WHD)
incl. pins / tip |
x 204 x 59 mm / x 8.03 x 2.32 inch |
| Weight |
160 g / 5.64 oz |
| Information source |
- - Manufacturers Literature STC 1947 catalog, 1945 data sheet
Babani, International Radio Tube Encyclopaedia p-.172 & 173
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
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3B/850A: Fin Stewart
Fin Stewart
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Just Qvigstad
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3B/850A: My schematic collection.
Pier Antonio Aluffi
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