Antique radios, Old Time Radios
BW5_7pin
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Country:
France
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| Identical to |
BW5_7pin
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| Similar
Tubes |
Other base:
BW5
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| Base |
French Bigrille 7 pin (Q, B5+2)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2.5 Volts / If 1.75 Ampere / Indirect / Specified voltage AC/DC |
| Description |
The manufacturer datasheet indicates:
"This tube can be delivered either with a standard 4 pins base with a normal arrangement and two connection placed laterally on the base for feeding the heating filament, the two normal filament pins being short-circuited and joined to the cathode, or with a base 6 pins bas, the two filament supply pins have a larger section.
The first base allows the use of the "B.W.5" tube on sets already fitted without modifying the connections. »
This seems not correct, as all BW5 tubes we know of to date have either a 5 pins Bigrille base with 2 side connections, or a 7 pins Bigrille base with five thin and 2 thicker pins.
Text in other
languages (may
differ)
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| Information source |
- - Manufacturers Literature Datasheet Mars 1929
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BW5_7pin: W.H.
Wolfgang Holtmann
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Just Qvigstad
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BW5_7pin: own collection
Peter den Boer
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