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38220

Information - Help 
ID = 15505
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Amperex; New York 
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to 38220 = 3C21 = ZB120

Base Jumbo 4-pin bayonet (1918) (Codex=Byy)
Was used by Military and/or Government
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 efficiency RF multiplying power amplifier and conventional power amplifier. It has an amplification factor of 90 and DC plate voltage of 750 to 1000. The 38220 was used by the US Navy. the tube is listed in "Tube Lore II as a 120. Probable error

 
Dimensions (WHD)
incl. pins / tip
x 172 x 54 mm / x 6.77 x 2.13 inch
Information source Tube Lore (II)   p. 183
Tube Lore (I)   
Taschenbuch zum Röhren-Codex 1948/49

38220_so.png 38220
Anonymous 10 Collector


Just Qvigstad
3c21a~~1.png
38220: Manufacturer's Literature
Emilio Ciardiello

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