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VT-221

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ID = 11822
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Vacuum Pentode   Power/Output 
Identical to VT-221 = 3Q5 = 3Q5GT
Similar Tubes
Other shape (e.g. bulb type):
  3Q5G ; DL33 ; Z8191

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uzb)
Filament Vf 2.8 Volts / If 0.05 Ampere / Direct / Battery =
Description Heater also 1.4V / 0.1A 
Text in other languages (may differ)
Information source Taschenbuch zum Röhren-Codex 1948/49   

s_310_g.gif VT-221: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20

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Just Qvigstad
Usage in Models 1= 1942?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of

 
vt221.jpg

VT-221
 

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