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MR1

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ID = 7076
       
Country:
Great Britain (UK)
Brand: Hivac Ltd.; Harrow-on-the-Hill
Tube type:  Half-Wave Mercury-Vapor Rectifier   Power-supply 
  Ca. 1925 up to 1945 very rare. ***
Identical to MR1

Base Edison medium E14 = 14 mm, mignon (Codex=Edison 14 mm)
Was used by Industrial
Filament Vf 5 Volts / If 10 Ampere / Direct / Specified voltage AND current AC/DC
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   Advertisement Nov 1936
Babani, International Radio Tube Encyclopaedia
Universal Vade-Mecum, Electron Valves and Semiconductor Devices


Just Qvigstad
mr1a.png
MR1: GEC's catalogue supplement
Anonymous 413 Collector

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Usage in Models 1= 1920?? ; 1= 1925?

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

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