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EFP20

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ID = 12717
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Secondary Emission Tetrode 
Identical to EFP20
First year 1947 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Mar.1948 : Funkschau # 3

Filament Vf 6 Volts / If 0.42 Ampere
Information source Taschenbuch zum Röhren-Codex 1948/49   

efp20_so.png EFP20: rtt
Anonymous 10 Collector

efp20_babani_book2_p7.png
EFP20: Babani 1949-1951 Book2 page 7
Patrice Zeissloff

 

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