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2504

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ID = 7523
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to 2504
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
1927 : -- Schematic

Base Swan-Bajonett B22=22 mm (Codex=Eo)
Filament Vf 1 Volts / If 0.08 Ampere / Direct
Description This tubes is only to be used to supply negative grid bias. Specially designed for use in the Philips 2501 using the SBC lampbase with the anode connected to the brass shell. 
Text in other languages (may differ)
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
n_2504.jpg
2504: Philips 2504
John Koster

 

Usage in Models 3= 1927 ; 1= 1928 ; 1= 1929

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


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