Antique radios, Old Time Radios

B442

Country:	Netherlands		Brand:	Philips; - Eindhoven; Netherlands
			Tube type:	Screen-grid Tetrode

Tube ID = 1668


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Identical to	B442 = R81 = DZ2 = B442/A = TB42
Similar Tubes	Normally replaceable-slightly different: 4AC; 4GAF; A4GAE; DS1_Thermion; S100; S409; S410 Heater different: B442_SERIE_100 Other base: B442/O; B442M
First Series	1927 Tube leaflet collection E.Erb Analysis by original leaflets

Base	Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Er)
Was used by	Radio/TV-reception etc.
Filament	Vf 4 Volts / If: 0.1 Ampere / -: Direct / -: Battery = /
Literature	Taschenbuch zum Röhren-Codex 1948/49

CA
Christian ADAM

Telefunken Werkstattbuch
Wolfgang Bauer

RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Usage in Models (calculation each 25th of the month)	1= 1927?? ; 1= 1927? ; 3= 1927 ; 2= 1928 ; 1= 1929 ; 1= 1930?? ; 1= 1930? ; 10= 1930 ; 11= 1931 ; 5= 1932 ; 1= 1933 ; 1= 1935 ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 38

No further Information for

B442

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