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A442R

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ID = 12504
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to A442R

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Er) Top contact screw type.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.06 Ampere / Direct
Information source Taschenbuch zum Röhren-Codex 1948/49   
L'ABCDaire des lampes de TSF des jeunes années   p. 24

3_2.png A442R: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
a442r_spec.png
A442R: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Usage in Models 1= 1928?? ; 1= 1928

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
 

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