Antique radios, Old Time Radios
AL3
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Country:
Netherlands
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| Identical to |
AL3
= TL3
= TAL3
= TL34
= VAL3
= UAL3
|
| Similar
Tubes |
Heater different:
AL4
Heater and shape different:
EL3
Other base and data slightly different:
PenA4
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| First year |
1935
Tube leaflet collection E.Erb Analysis by original leaflets = 1936
|
| First Source
(s) |
10.Mar.1935 : Histoire de la lampe de radio
|
| Predecessor Tubes |
E443H
|
|
Successor Tubes
|
1936
EL3
EL3N
AL4
|
| Base |
Europe side contact P8A (Au P, 8SC) (Codex=Sfo)
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 1.85 Ampere / Indirect / Specified voltage AC/DC |
| Description |
After high-gm output penthodes were launched in the UK as early as 1933, this new genre of tubes came to continental Europe in 1935, as the AL3 appeared by Philips, with a round (cylindrical) cathode and a gm of 9 compared to 2,5 mA/V of earlier types as a new standard in Europe which remained until the end.
As in 1936 Telefunken launched the almost identical AL4 with an improved profiled cathode, Philips, Tungsram and other companies then renamed their existing AL3 also into AL4 and continued producing it unchanged. The type AL3 was withdrawn and replaced by the AL4. [J.R. Jan. 5, 2017]
Text in other
languages (may
differ)
|
| Information source |
Histoire de la lampe de radio (adv.
Taschenbuch zum Röhren-Codex 1948/49 Design = Philips
|
AL3: Röhrenkartei Drenkelfort
Peter Hoddow
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AL3: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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AL3: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):86
Collection of
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