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R66

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ID = 51416
       
Country:
Italy
Brand: Zenith; Monza (Italy)
Tube type:  Half-Wave Mercury-Vapor Rectifier   Power-supply 
Identical to R66
Similar Tubes
Multiple differences or of other kind:
  866A

Base UX-Base (4 Pins (2 thick, USA 1924, UX) Top contact with a cap.
Filament Vf 2.5 Volts / If 5 Ampere / Direct
Description Looks very similar to the 866A rectifier. Same filament data etched on the bulb, the code R66 being followed by the suffix s/A. 
Information source -- Collector info (Sammler)   
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zenith_r66sa_25v5a.jpg
R66
Giovanni Carenini

 

from Just Qvigstad


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