Antique radios, Old Time Radios
B443_UX4pin
| Base |
UX-Base (4 Pins (2 thick, USA 1924, UX)
Sidecontact.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 0.15 Ampere / Direct / Specified voltage AC/DC |
| Description |
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 |
50 x 105 x 35 mm / 1.97 x 4.13 x 1.38 inch |
| Information source |
- - Manufacturers Literature
-- Collector info (Sammler)
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B443_UX4pin
Peter den Boer
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Just Qvigstad
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B443_UX4pin: Philips Röhren Daten 1933
Peter Hoddow
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4
Collection of
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