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OH4

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ID = 19818
       
Country:
Argentina
Brand: Philips Argentina, FAPESA, Miniwatt tubes; Buenos Aires
Tube type:  Pentagrid-Converter (Heptode)   Pentagrid (old)   Controlling (mu) 
Identical to OH4
Similar Tubes
Other shape (e.g. bulb type):
  12A8GT

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap
Was used by Radio/TV-reception etc.
Filament Vf 12.6 Volts / If 0.15 Ampere / Indirect / Parallel / series AC/DC
Description

Siehe auch: Mysterious P-, O- and U- tube-series

 
Literature
 
oh4.jpg
OH4: Belongs to a Philips AL742H
Jorge Mochkovsky

 
s_352_g.gif
OH4: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe

 

Usage in Models 2= 1943 ; 2= 1947?? ; 1= 1950??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5


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