Antique radios, Old Time Radios

DF91

Country:	Europe	Brand:	Common type Europe
		Developer:	Philips; - Eindhoven; Netherlands
		Tube type:	Vacuum Pentode RF/IF-Stage Controlling (mu)

Tube ID = 434


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Identical to	DF91 = 1T4 = W17 = 1K2 = 1F3
First Series	Dec.1948 Tube leaflet collection E.Erb Analysis by original leaflets [RM4805]
First Source (s)	Mar.1948 : Funkschau (FS) # 3

Base	Miniatur-7-Pin-Base B7G, USA 1940 (Codex=Zoo)
Was used by	Radio/TV-reception etc.
Filament	Vf 1.4 Volts / If: 0.05 Ampere / -: Direct / -: Battery = /
Description	HF-Regelpentode, ab 1950 in Deutschland. Text in other languages (may differ)
Dimensions (WHD)	19 x 54 x mm / 0.75 x 2.13 x inch
Weight	10 g / 0.35 oz
Tube prices	0 Tube prices (visible for members only)
Literature	Taschenbuch zum Röhren-Codex 1948/49


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

M.M.
Michael Mischke

Telefunken Handb. d. Rundfunkröhren
Peter Hoddow

Ratheiser RTH,3.Aufl.,1964
Egon Penker

Usage in Models (calculation each 25th of the month)

1= 1946? ; 5= 1947 ; 2= 1948?? ; 1= 1948? ; 9= 1948 ; 1= 1949?? ; 2= 1949? ; 29= 1949 ; 4= 1950?? ; 10= 1950? ; 39= 1950 ; 2= 1951?? ; 4= 1951? ; 48= 1951 ; 13= 1952?? ; 6= 1952? ; 64= 1952 ; 1= 1953?? ; 12= 1953? ; 70= 1953 ; 6= 1954?? ; 3= 1954? ; 23= 1954 ; 2= 1955?? ; 1= 1955? ; 14= 1955 ; 2= 1956?? ; 1= 1956? ; 13= 1956 ; 1= 1957?? ; 1= 1957? ; 4= 1957 ; 2= 1958?? ; 1= 1958? ; 5= 1958 ; 1= 1959? ;

Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 403

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DF91

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