Antique radios, Old Time Radios
1635
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Country:
United States of America (USA)
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| Identical to |
1635
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| Similar
Tubes |
Other characteristic (electr. data):
6Y7G
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| First Source
(s) |
1942 : Tube Lore (I)
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| Base |
Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ud)
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| Filament |
Vf 6.3 Volts / If 0.6 Ampere / Indirect / Specified voltage AC/DC |
| Description |
Duotriode, low-distortion high-µ Class B type, low-heater-current, T9 bulb on octal base; heater 6.3V @ 600 mA, µ 65, 3.3 W (RCA, W). Dev. for government use; "particularly used for underwater sound" (sonar?}. Announced by RCA 1942; sales limited to existing inventory 1971. [Information by L. Sibley]
Since this tube is operated without negative bias, it requires a high-µ characteristic to keep the plate current low. This is achieved by using two separate control grids connected in parallel inside the bulb.
Text in other
languages (may
differ)
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| Tube prices |
1 Tube prices (visible for members
only)
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| Information source |
Essential Characteristics, GE 1973
Taschenbuch zum Röhren-Codex 1948/49
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1635: RCA Manual
Jacob Roschy
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1635: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
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Just Qvigstad
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1635: Manufacturer paper
Tomasz Szczesniak
More ...
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