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4H2

Information - Help 
ID = 1253
       
Country:
Germany
Brand: Loewe-(Opta); Deutschland
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 4H2 = AF3
First year 1936 Tube leaflet collection E.Erb Analysis by original leaflets

Base Europe side contact base P (P8A) (Codex=Sf)
Filament Vf 4 Volts / If 0.65 Ampere / Indirect / Parallel, (AC/DC)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  typische_schautung_des_4m2_4h2_4v1_4e1_140ng_von_loewe_opta_638w~~2.png
  4H2: Loewe Schautung
Anonymous 1038 Collector
 
4h2.jpg
4H2: M.N.
Michael Niermann

 
s_30_g_1.gif
4H2: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe

 
4h2_spec.png
4H2: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 1= 1936 ; 2= 1937 ; 1= 1938

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4


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