Antique radios, Old Time Radios
3B/504B
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Country:
Great Britain (UK)
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| Identical to |
3B/504B
= 4304CB
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
2 Top contacts.
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| Was used by |
Radar |
| Filament |
Vf 7.5 Volts / If 3.25 Ampere / Direct / Specified voltage AC/DC |
| Description |
Pa <50W at Va <1250V.
Improved version of 4304BB, with graphite or carbonised anode.
4304CB was used in the early productions of AI and ASV airborne radar sets at 200 MHz.
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Dimensions (WHD)
incl. pins / tip |
60 x 165 x mm / 2.36 x 6.50 x inch |
| Weight |
72 g / 2.54 oz |
| Information source |
Babani, International Radio Tube Encyclopaedia p. 172 & 173
Universal Vade-Mecum, Electron Valves and Semiconductor Devices Section 352, p. 821
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