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3A8

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ID = 10547
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Diode-Triode-Pentode 
Identical to 3A8 = 3A8GT

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uw)
Filament Vf 2.8 Volts / If 0.1 Ampere / Direct / Battery =
Description Glass octal type used as combined detector, af amplifier, and rf amplifier. The 3A8GT is used for battery-operated receivers with either 1.4 (parallel) or 2.8 (series) volt dc filament supplies. Typical operation of triode unit as class A amplifier. Some schematics name it in short 3A8. Therefore we have to list the 3A8 too. 
Information source Taschenbuch zum Röhren-Codex 1948/49   

3a8.png
3A8: Schematic from my documents.
Pier Antonio Aluffi

399.png 3A8: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
3a8.png
3A8: elektron taschenbuch 1952
Heinz Höger

Usage in Models 1= 1940?

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

Collection of

 
3a8g_bbbs8302597.jpg

 

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