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3C21

Information - Help 
ID = 15177
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Amperex; New York 
Tube type:  Transmitting Triode, air cooled   Universal 
Identical to 3C21 = 38220 = ZB120

Base Jumbo 4-pin bayonet (1918) (Codex=Byy)
Was used by Transmittertube (Radio)
Filament Vf 10 Volts / If 2 Ampere / Direct / Specified voltage AND current AC/DC
Description

This tube was designed by Amperex and is listed as a low distortion zero bias Class B Amplifier and Modulator and as a high frequency multiplying power amplifier and conventional power amplifier. It has an amplification factor of 90 and DC plate voltage of 750 - 1000.

 
Dimensions (WHD)
incl. pins / tip
x 172 x 54 mm / x 6.77 x 2.13 inch
Information source Tube Lore (II)   p. 85
Tube Lore (I)   
Taschenbuch zum Röhren-Codex 1948/49
Babani, International Radio Tube Encyclopaedia

3c21_so.png 3C21
Anonymous 10 Collector


Just Qvigstad
3c21a~~2.png
3C21: Manufacturer's Literature
Emilio Ciardiello

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