Antique radios, Old Time Radios

KL4

Country:	Europe		Brand:	Common type Europe tube
			Tube type:	Vacuum Pentode Power/Output

Tube ID = 1777

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Identical to	KL4 = 3P2 = BLP61 = TKL4
Similar Tubes	Normally replaceable-slightly different: P226_p8 Other base: KL4G; L227D; PP2; PP2101; PP215; PP230 Other base and data slightly different: P226; RES212; TL230
First year	Feb.1936 Tube leaflet collection E.Erb Nr. 34 Philips-Hefte
First Source (s)	Feb.1936 : Philips Bulletin # D34 May.1936 : Philips Bulletin # F30
Predecessor Tubes	KL1_4pin
Successor Tubes	1939 KL5 DL21

Base	Europe side contact base P (P8A) (Codex=Soo)
Filament	Vf 2 Volts / If: 0.14 Ampere / -: Direct / -: Battery = /
Tube prices	1 Tube prices (visible for members only)
Literature	Taschenbuch zum Röhren-Codex 1948/49


	KL4: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus †

KL4: JR
Jacob Roschy

KL4: Telefunken Werkstattbuch
Wolfgang Bauer

KL4: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Usage in Models	2= 1936?? ; 6= 1936? ; 35= 1936 ; 5= 1937? ; 53= 1937 ; 1= 1938?? ; 7= 1938? ; 44= 1938 ; 2= 1939? ; 45= 1939 ; 1= 1940?? ; 7= 1940 ; 1= 1941 ; 1= 1942? ; 1= 1942 ; 1= 1944 ; 1= 1946? ; 1= 1946 ; 1= 1947?
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 215

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