Antique radios, Old Time Radios
4-250A
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Country:
United States of America (USA)
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Brand:
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| Tube type: |
Transmitting Tetrode, air cooled VHF |
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| Identical to |
4-250A
= QB3,5/750GA
= 5D22
= PL-5D22
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| Similar
Tubes |
Normally replaceable-slightly different:
6156
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| First Source
(s) |
15.Nov.1948 : - - Manufacturers Literature
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| Base |
Giant 5 pin metal shield (B5E)
Top contact with a cap.
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| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 5 Volts / If 14.5 Ampere / Direct / Specified voltage AC/DC |
Dimensions (WHD)
incl. pins / tip |
90 x 156 x mm / 3.54 x 6.14 x inch |
| Weight |
185 g / 6.53 oz |
| Tube prices |
2 Tube prices (visible for members
only)
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| Information source |
Tube Lore (II) p. 203
Universal Vade-Mecum, Electron Valves and Semiconductor Devices Section 456, p. 996
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
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4-250A: ARRL The Radio Amateur's Handbook 1950
Götz Linss † 27.06.21
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4-250A: Tabu Röhren-Codex, 1948
Anonymous 15 Collector
More ...
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Just Qvigstad
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4-250A: Valvo,Senderöhren, 1983
Anonymous 15 Collector
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4
Collection of
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