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R66

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ID = 51416
       
Country:
Italy
Brand: Zenith; Monza (Italy)
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
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.
Was used by Industrial
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.

 
Dimensions (WHD)
incl. pins / tip
x 147 x 48 mm / x 5.79 x 1.89 inch
Information source -- Collector info (Sammler)   
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 60, p. 81

866a_so~~3.png R66: Fin Stewart
Fin Stewart


Just Qvigstad
Usage in Models 1= 1938

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

Collection of

 
zenith_r66sa_25v5a.jpg

R66
 

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