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72

Information - Help 
ID = 7403
       
Country:
United States of America (USA)
Brand:
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to 72
Similar Tubes
Normally replaceable-slightly different:
  CV709 ; RKR-72 ; RX235

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Br) Top contact with a cap
Filament Vf 2.5 Volts / If 3 Ampere / Direct
Dimensions (WHD)
incl. pins / tip
38 x 120 x mm / 1.50 x 4.72 x inch
Weight 55 g / 1.94 oz
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  72.png
  72: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Michael Schlör
 
pkr_72_raytheon_rmf.jpg
72: My Collection
Bruce Morgenstern

 
72_so.png
72: ARRL Handbook 1972
Michael Schlör

 

Usage in Models 1= 1934? ; 1= 1938

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2


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