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25W4

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ID = 18653
       
 
   
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to 25W4

Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Radio/TV-reception etc.
Filament Vf 25 Volts / If 0.3 Ampere / Indirect / Specified current AC/DC ~ = (Series working)

25w4.gif
25W4: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †

25w4_so.png 25W4: ARRL Handbook 1972
Anonymous 10 Collector


Just Qvigstad
25w4_dat.png
25W4: elektron taschenbuch 1952
Heinz Höger

Usage in Models 4= 1948? ; 1= 1949 ; 7= 1950? ; 1= 1950 ; 2= 1951? ; 1= 1953 ; 1= 1955??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):17

Collection of

 
25w4_rad_tel_tube_co_img_01_rmf.jpg

25W4
 

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