Antique radios, Old Time Radios
B443_4pin
| Base |
Europe 4-Pin B4 + side contact
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 0.15 Ampere / Direct / Specified voltage AC/DC |
| Description |
First output pentode, on market Sept. 1927
Equivalent types: RES174d (Telefunken), L415D (Valvo), PP415 (Tungsram)
Successors: B443S, L416D, RES164
The B443 is the first produced output pentode of the world, introduced by Philips in September 1927. It's amplification and its power output was much higher as with an output triode of equal size. The B443 has established the replacement of output triodes by multiple-grid output tubes. The equivalent Telefunken type RES174d appeared in 1931.
[Jacob Roschÿ, 2003-Jan-14]
Text in other
languages (may
differ)
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Dimensions (WHD)
incl. pins / tip |
x 103 x 50 mm / x 4.06 x 1.97 inch |
| Tube prices |
1 Tube prices (visible for members
only)
|
| Information source |
Universal Vade-Mecum, Electron Valves and Semiconductor Devices Section 204, p. 403
Taschenbuch zum Röhren-Codex 1948/49
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B443_4pin: RPG Funke
Wolfgang Holtmann
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Just Qvigstad
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B443_4pin: own collection
Peter den Boer
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):11
Collection of
Collection of a member from FIN Collection of a member from D |
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