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VT-133

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ID = 15014
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to VT-133 = 12SR7 = CV700
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vk)
Filament Vf 12.6 Volts / If 0.15 Ampere / Indirect / Parallel / series AC/DC
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
t831b_01_12sr7_vt133.jpg
VT-133: Own collection
Valery Gromov

 
s_358_g_3.gif
VT-133: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe

 

Usage in Models 1= 1939?

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


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