Antique radios, Old Time Radios
221A
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Country:
United States of America (USA)
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| Identical to |
221A
= NN
= ML-371
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| Base |
Jumbo 4-pin bayonet (1918)
Top contact with a cap.
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| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 5 Volts / If 10 Ampere / Direct |
| Description |
According to Tube Lore II, this tube was made with a 2 volt filament and limited production of 50 tubes.
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Dimensions (WHD)
incl. pins / tip |
70 x 238 x mm / 2.76 x 9.37 x inch |
| Information source |
Tube Lore (II) p. 235
Taschenbuch zum Röhren-Codex 1948/49
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221A: AH eigene Sammlung
Alexander Hofer
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Just Qvigstad
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Collection of
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