Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 15177
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 (Codex=Byy)
Was used by Transmittertube (Radio)
Filament Vf 10 Volts / If 2 Ampere / Direct / Parallel / series 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
Literature Taschenbuch zum Röhren-Codex 1948/49   
Tube Lore (I)   
Michael Schlör

3C21: Manufacturer's Literature
Emilio Ciardiello

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]