Antique radios, Old Time Radios
203H
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Country:
United States of America (USA)
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| Identical to |
203H
= HF125
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| Similar
Tubes |
Differences not known by us:
303C
; 303U
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| Base |
Jumbo 4-pin bayonet (1918) (Codex=By)
Top contact with a cap.
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| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 10 Volts / If 3.2 Ampere / Direct / Specified voltage AND current AC/DC |
| Description |
Similar to UV203A, with plate to top cap. Jumbo 4-pin bayonet base.
Proposed for RF heating.
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Dimensions (WHD)
incl. pins / tip |
x 237 x 64 mm / x 9.33 x 2.52 inch |
| Information source |
Universal Vade-Mecum, Electron Valves and Semiconductor Devices Section 365, p. 838
Tube Lore (I)
Taschenbuch zum Röhren-Codex 1948/49
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203H: ARRL Handbook 1972
Anonymous 10 Collector
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Just Qvigstad
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203H: Amperex Electronic Tubes 1953
Achim Dassow
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