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ID = 21690
Tube type:  Oscilloscope CRT, picture tube   Indication 
Identical to D14-131GH
Similar Tubes
Heater different:

Base SPECIAL TUBEBASE in general
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AC/DC
Description Schirm: 100 x 80 mm. 
Dimensions (WHD)
incl. pins / tip
x x 350 mm / x x 13.78 inch
Weight 1000 g / 35.27 oz
Information source - - Manufacturers Literature   Telefunken Taschenbuch 1971
D14-131GH: AH eigene Sammlung
Alexander Hofer

D14-131GH: Telefunken Taschenbuch 1971
Anonymous 15 Collector

D14-131GH: Telefunken Taschenbuch 1971
Anonymous 15 Collector

Usage in Models 1= 1971? ; 1= 1973

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):2

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