radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

503A

Information - Help 
ID = 28855
       
Country:
United States of America (USA)
Brand: DeForest-Tubes
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to 503A = UV203A = C303

Base Jumbo 4-pin bayonet (1918)
Was used by Transmittertube (Radio)
Filament Vf 10 Volts / If 3.25 Ampere / Direct
Description

50W Transmitting tube. Oscillator, RF amplifierand Class "B" modulator. Normal plate voltage 1250 at 125mA current..

 
Dimensions (WHD)
incl. pins / tip
x 220 x 64 mm / x 8.66 x 2.52 inch
Information source Vintage Radio 1887-1929, Greenwood's Classic Pictorial Album   
- - Manufacturers Literature   1933 Lafayette radio catalog.

203_a_503_a_sch.png
503A: RCA de forest
Günter Kudicke

503a_so.png 503A: ARRL Handbook 1972
Anonymous 10 Collector


Just Qvigstad
deforest_503a.png
503A: DeForest DataSheet
Franz Scharner

More ...
 
rca_503a.jpg

503A
 

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]
  

Data Compliance More Information