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ID = 71232
Brand: Fivre - tubes; Milano (MI)
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 1853GT
Similar Tubes
Different connections:
Other base and data slightly different:

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Filament Vf 6.3 Volts / If 0.45 Ampere / Indirect / Parallel, (AC/DC)
Unlike the American 1853/6AB7 the Fivre documentation indicates that the tube has a 
top cap connected to the control grid and same bulb as Fivres 1851GT
Source : page 19 & 22 "valvole riceventi data tecnici" (publishing date unknown)

Dimensions (WHD)
incl. pins / tip
x 90 x 33 mm / x 3.54 x 1.30 inch
Information source - - Manufacturers Literature   
1853GT: Catalogue Fivre
Patrice Zeissloff

1853GT: catalogo FIVRE
Tonino Giagnacovo

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