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 = W17 = 1K2 = 1F3 = 1T4

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: Telefunken Handb. d. Rundfunkröhren Peter Hoddow More ...	Just Qvigstad	DF91: Ratheiser RTH,3.Aufl.,1964 Egon Penker More ...

Usage in Models

8= 1947 ; 2= 1948?? ; 5= 1948? ; 12= 1948 ; 1= 1949?? ; 3= 1949? ; 35= 1949 ; 10= 1950?? ; 14= 1950? ; 46= 1950 ; 6= 1951?? ; 5= 1951? ; 58= 1951 ; 17= 1952?? ; 33= 1952? ; 82= 1952 ; 3= 1953?? ; 27= 1953? ; 79= 1953 ; 7= 1954?? ; 7= 1954? ; 34= 1954 ; 9= 1955?? ; 6= 1955? ; 21= 1955 ; 5= 1956?? ; 4= 1956? ; 18= 1956 ; 2= 1957?? ; 5= 1957 ; 2= 1958?? ; 5= 1958 ; 2= 1959? ; 1= 1962?? ; 2= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):576

Literature "Telefunken-Röhrenmitteilungen Nr. 531 112"

Collection of

DF91

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