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DK91

Information - Help 
ID = 433
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Tube type:  HEPTODE   Frequency converter 
Identical to DK91 = 1R5 = VT-171 = 1А1П = X17 = 1C1 = 1A2_1R5
Similar Tubes
Other characteristic (electr. data):
  8022
Heater different:
  1H33
First year Jun.1947 Trader Service Sheet (suppl. of Wireless & El. Trader, etc.) December 13th 1947 for model June 1947
First Source (s)
Mar.1948 : Funkschau # 3

Base Miniatur-7-Pin-Base B7G, USA 1940
Filament Vf 1.4 Volts / If 0.05 Ampere / Direct / Battery =
Description Heptode; Mischröhre, Valvo ab 1950 
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 4 Tube prices (visible for members only)
Literature - - Manufacturers Literature   
Taschenbuch zum Röhren-Codex 1948/49   
  dk91.png
  DK91: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
dk91_3.jpg
DK91: FC
Frank Cuffe

 
dk91_so.png
DK91: rtt
Michael Schlör

 
dk91_kennlinie.png
DK91: Ratheiser RTH,3.Aufl.,1964
Egon Penker


Usage in Models 8= 1947 ; 2= 1948?? ; 4= 1948? ; 6= 1948 ; 2= 1949? ; 30= 1949 ; 8= 1950?? ; 8= 1950? ; 35= 1950 ; 3= 1951?? ; 37= 1951 ; 1= 1952?? ; 6= 1952? ; 19= 1952 ; 1= 1953? ; 2= 1953 ; 1= 1954?? ; 2= 1954? ; 1= 1954 ; 4= 1955?? ; 1= 1955? ; 3= 1955 ; 1= 1956 ; 1= 1957? ; 1= 2013 ; 2= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):189


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