Antique radios, Old Time Radios

KL1_4pin

Country:	Europe	Brand:	Common type Europe tube
		Developer:	Telefunken Deutschland (TFK)
		Tube type:	Vacuum Pentode Power/Output

Tube ID = 747

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Identical to	KL1_4pin = KL71705 = P210 = TKL1_5pin
Similar Tubes	Other base: KL1_p8
First year	1934 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)	Apr.1934 : Funk, Die Zeitschrift des Funkwesens # 14
Successor Tubes	KL4

Base	Europe 5-Pin (O5A, B5) (Codex=F)
Was used by	Radio/TV-reception etc.
Filament	Vf 2 Volts / If: 0.15 Ampere / -: Direct / -: Battery = /
Tube prices	5 Tube prices (visible for members only)
Literature	Taschenbuch zum Röhren-Codex 1948/49


	KL1_4pin: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus †

KL1_4pin: Courtesy by FJH
Jacob Roschy

KL1_4pin: Telefunken Werkstattbuch
Wolfgang Bauer

KL1_4pin: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Usage in Models	2= 1934? ; 34= 1934 ; 14= 1935 ; 8= 1936 ; 1= 1937? ; 2= 1937 ; 2= 1938? ; 12= 1938 ; 1= 1939? ; 41= 1939 ; 1= 1940 ; 1= 1941 ; 1= 1947? ; 1= 1947 ; 1= 1948? ; 2= 1948
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 124

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