Antique radios, Old Time Radios
G442
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Country:
Netherlands
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Brand:
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Longlife, the Hague |
| Tube type: |
Screen-grid Tetrode RF/IF-Stage |
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Ca. 1925 up to 1945 rare. |
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| Identical to |
G442
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| Similar
Tubes |
Normally replaceable-slightly different:
B442
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| Production stop |
Feb.1938 |
| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Er)
Top contact screw type.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 0.1 Ampere / Direct / Battery = |
| Description |
The Röhren-Codex (Germany) lists this tube as Thermion brand, but actually it's Longlife.
Used for HF amplification.
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| Information source |
Taschenbuch zum Röhren-Codex 1948/49
- - Manufacturers Literature 1-2-1935
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G442: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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