Antique radios, Old Time Radios

DF91

ID = 434

Country:

Europe

Brand:	Common type Europe tube/semicond.
Developer:	Philips; Eindhoven (tubes international!); Miniwatt
Tube type:	Vacuum Pentode RF/IF-Stage Controlling (mu)

Identical to

DF91 = 1T4 = W17 = 1K2 = 1F3

First year

Jun.1947 Trader Service Sheet (suppl. of Wireless & El. Trader, etc.) December 13th 1947

First Source (s)

Mar.1948 : Funkschau # 3

Base	Miniatur-7-Pin-Base B7G, USA 1940 (Codex=Zoo)
Filament	Vf 1.4 Volts / If 0.05 Ampere / Direct / Battery =
Description	HF-Regelpentode, ab 1950 in Deutschland.
Dimensions (WHD) incl. pins / tip	19 x 54 x mm / 0.75 x 2.13 x inch
Weight	10 g / 0.35 oz
Tube prices	6 Tube prices (visible for members only)
Information source	Taschenbuch zum Röhren-Codex 1948/49


	DF91: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus †

DF91: scc
Christian Schaufelberger

DF91: Telefunken Handb. d. Rundfunkröhren
Peter Hoddow

DF91: Ratheiser RTH,3.Aufl.,1964
Egon Penker

from Just Qvigstad

Usage in Models

8= 1947 ; 2= 1948?? ; 4= 1948? ; 10= 1948 ; 3= 1949? ; 36= 1949 ; 6= 1950?? ; 14= 1950? ; 47= 1950 ; 6= 1951?? ; 4= 1951? ; 58= 1951 ; 14= 1952?? ; 30= 1952? ; 82= 1952 ; 3= 1953?? ; 25= 1953? ; 78= 1953 ; 6= 1954?? ; 6= 1954? ; 33= 1954 ; 9= 1955?? ; 5= 1955? ; 21= 1955 ; 4= 1956?? ; 2= 1956? ; 16= 1956 ; 2= 1957?? ; 5= 1957 ; 2= 1958?? ; 1= 1958? ; 5= 1958 ; 2= 1959? ; 1= 1962?? ; 2= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):552

Literature "Telefunken-Röhrenmitteilungen Nr. 531 112"

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