Antique radios, Old Time Radios

MHL4

Country:	Great Britain (UK)		Brand:	Marconi-Osram - (Valves/Tubes); GB
			Tube type:	TRIODE (Detail uncertain)

Tube ID = 2775

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Identical to	MHL4 = CV1038
Similar Tubes	Normally replaceable-slightly different: 244V; 41MHL; 4HLAC; S415N_Fotos; TE244 Other class quality (otherwise equal): CV3547

Base	Europe 5-Pin (O5A, B5) (Codex=F)
Filament	Vf 4 Volts / If: 1 Ampere /
Literature	Taschenbuch zum Röhren-Codex 1948/49

MHL4: Gecovalve UK
Jose Vigil

MHL4: Telefunken Werkstattbuch
Wolfgang Bauer

MHL4: osram wireless guide 1931
Giuseppe Antonio Tusini

Usage in Models	1= 1929 ; 1= 1930 ; 1= 1931? ; 10= 1931 ; 1= 1932? ; 8= 1932 ; 1= 1933? ; 1= 1933 ; 1= 1934 ; 1= 1935 ; 1= 1937 ; 1= 1945?
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 28

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