Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 18476
United States of America (USA)
Brand: General Electric Co. (GE); Bridgeport CT, Syracuse NY
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to UV204_spherical = C304
Similar Tubes
Other shape (e.g. bulb type):
First year 1921 Vintage Radio 1887-1929, Greenwood's Classic Pictorial Album
First Source (s)
Apr.1921 : Saga of the Vacuumtube, Tyne p.325
01.Sep.1921 : RCA Catalog

Base Pin-and-blade jumbo Top contact with a cap
Was used by Transmittertube (Radio)
Filament Vf 11 Volts / If 14.75 Ampere / Direct / Parallel, (AC/DC)
Description This tube was developed at the G E laboratories in the spring of 1920 and the type number was assigned to it in November 1920. It was announced to the public in march 1921. Plate: 2000 V, 250 mA. Output 250 Watts. Amplification constant = 25.
Price in 1922: $ 110.-.
Middle part of the bulb is spherical, dia.5". later 204s have cylindrical glass.
Base-Special End Mountings: UT-501 and UT-502.
Error in Tyne, p.327: Fig.16-23 shows a single ended tube, not a UV204! 
Dimensions (WHD)
incl. pins / tip
127 x 361 x 127 mm / 5.00 x 14.21 x 5.00 inch
Weight 567 g / 20.00 oz
Literature Taschenbuch zum Röhren-Codex 1948/49   
-- Original-techn. papers.
UV204_spherical: KoBi
Konrad Birkner † 12.08.2014

UV204_spherical: Fin Stewart
Fin Stewart

UV204_spherical: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

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]