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U1

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ID = 27387
       
Country:
Czechoslovakia
Brand: Mars (tubes), Radioelektra; Praha
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
  Ca. 1925 up to 1945 rare.
Identical to U1

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Filament Vf 4.5 Volts / If 1.8 Ampere / Direct
Description Gewicht und Masse gemäss Röhre mit Metallsockel und Aufschrift 4.5 - 5 Volt (seitlich). Die Anodenspannung ist nicht angeschrieben. Oben bildet der Schriftzug Radioelektra CSR einen Kreis und darin steht Praha für Prag. Alles in Grossbuchstaben. 
Dimensions (WHD)
incl. pins / tip
56 x 120 x 56 mm / 2.20 x 4.72 x 2.20 inch
Weight 55 g / 1.94 oz
Tube prices 1 Tube prices (visible for members only)
Literature -- Collector info (Sammler)   
 
u1_radioelektra_csr.jpg
U1: Sammlung EE
Ernst Erb

 

Usage in Models 1= 1927

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of a member from D

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