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GFT21

Information - Help 
ID = 34340
       
Country:
Germany
Brand: TeKaDe (TKD), Süddeutsche Telefon-Apparate- Kabel- und Drahtwerke; Nürnberg
Tube type:  Transistor   Audio Frequency 
Identical to GFT21
Similar Tubes
Normally replaceable-slightly different:
  AM52 ; OX7004 ; OX7005 ; SFT153
Other class quality (otherwise equal):
  7003_Mira
Different maximum ratings:
  OC71
First Source (s)
Mar.1957 : -- Collector info (Sammler)

Base Wires
Was used by Radio/TV-reception etc.
Filament Solid State
Description PNP germanium junction transistor intended as AF amplifier 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
6 x 9 x mm / 0.24 x 0.35 x inch
Weight 1 g / 0.04 oz
Information source -- Collector info (Sammler)   KTT 1979/80
  gft_21.png
  GFT21: Funkschau 20/66 S.635
Egon Strampe
 
gft21.jpg
GFT21: Eigene Sammlung
Siegfried Neumann

 
to_1_alt.png
GFT21: G.S.
Günther Stabe † 19.8.20

 
gft21.png
GFT21: TKD_Datenblatt im Original
Hans M. Knoll


Usage in Models 2= 1957 ; 4= 1958? ; 11= 1958 ; 2= 1959?? ; 11= 1959 ; 1= 1960? ; 4= 1960 ; 1= 1962?? ; 1= 1962? ; 1= 1962 ; 3= 1963 ; 1= 1965

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):42


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