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DK91 Country:  Europe      Brand:  Common type Europe    Tube type:  HEPTODE   Frequency converter  Tube ID = 433 previous  |  next Identical to DK91 = 1R5 = VT-171 = 1a1p = X17 = 1C1_Heptode = 1A2_1R5 Similar Tubes Other characteristic (electr. data):  8022 Heater different:  1H33 First Series   Dec.1948 Tube leaflet collection E.Erb Analysis by original leaflets [RM4805, Ph.Arch.9.4 First Source (s) Mar.1948 : Funkschau (FS) # 3 Base Miniatur-7-Pin-Base B7G, USA 1940 Was used by Radio/TV-reception etc. Filament Vf 1.4 Volts / If: 0.05 Ampere / -: Direct / -: Battery = / Description Heptode; Mischröhre, Valvo ab 1950  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 - - Manufacturers Literature    Taschenbuch zum Röhren-Codex 1948/49        Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus

Röhrensammlung Wolfgang Bauer   Variants Mullard Valve+Service Manual 1951 Trev Levick   Ratheiser RTH,3.Aufl.,1964 Egon Penker

Usage in Models (calculation each 25th of the month)   1= 1946? ; 5= 1947 ; 2= 1948?? ; 1= 1948? ; 6= 1948 ; 1= 1949?? ; 1= 1949? ; 23= 1949 ; 2= 1950?? ; 3= 1950? ; 30= 1950 ; 1= 1951?? ; 34= 1951 ; 1= 1952?? ; 1= 1952? ; 15= 1952 ; 1= 1953? ; 2= 1953 ; 1= 1954?? ; 1= 1954? ; 1= 1954 ; 1= 1955?? ; 3= 1955 ; 1= 1956 ; 1= 1957? ; 1= 1958 ; Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   140

Variants
	DK91*Telestar Made by Telefunken and sold in Finland under the Telestar label. See:- http://www.radiomuseum.org/forum/another_telefunken.html 18.Mar.2007 Roy Johnson

No further Information for DK91

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