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EE50

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ID = 12715
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Secondary Emission Tetrode   RF/IF-Stage 
Identical to EE50
First year 1939 Tube leaflet collection E.Erb Philips-Book [178]
First Source (s)
25.Aug.1938 : The Wireless World, London (WW, 79) p181

Base Loctal-9-Pin (B9G) (Codex=Y)
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel, (AC/DC)
Description Secondary Emission. 20mA/V.
Developed by Philips/Mullard for broad-band TV use in 1938 using an intermediate cathode for secondary emission to achieve high gain from a single tube. The B9G base and the all-glass construction with aluminium shield was developed for this tube to achieve short electrical paths and low capacitance.
It was quickly superceded by the EF50 - a standard pentode - of similar mechanical construction which has a lower noise figure. 
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
  ee50.gif
  EE50: ficha de valvulas
Getulio Jimenez-Gomez
 
ee50_1.jpg
EE50: K.H.Fischer
Karlheinz Fischer

 
lo33.png
EE50: RTT 1974 (Franzis) 13. Auflage
Martin Renz

 
ee50_data.png
EE50: rtt
Michael Schlör


Usage in Models 1= 1939?? ; 1= 1940?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2


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