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ID = 51748
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Half-Wave Mercury-Vapor Rectifier   Power-supply 
Identical to 2XM600A = P600_Mazda = 866A
Similar Tubes
Normally replaceable-slightly different:

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 / Specified voltage AC/DC
Dimensions (WHD)
incl. pins / tip
61 x 188 x 61 mm / 2.40 x 7.40 x 2.40 inch
Information source - - Manufacturers Literature   Catalogue Mazda 1960
Babani, International Radio Tube Encyclopaedia   P. 248 & 249
Universal Vade-Mecum, Electron Valves and Semiconductor Devices

2xm600a866aculotcataloguemazda1960doc.png 2XM600A: Catalogue Mazda
Patrice Zeissloff

Just Qvigstad
2XM600A: Catalogue Mazda 1960
Patrice Zeissloff

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