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4688

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ID = 10877
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Vacuum Pentode   Power/Output 
Identical to 4688 = AL5/375
Similar Tubes
Different maximum ratings:
  AL5
Heater different:
  4689
First year 1938 Tube leaflet collection E.Erb Analysis by original leaflets
Successor Tubes EL61  

Base Europe side contact base P (P8A) (Codex=Seo)
Filament Vf 4 Volts / If 2 Ampere / Indirect
Literature Taschenbuch zum Röhren-Codex 1948/49   
  4688.png
  4688: Internet
Miguel Angel Trujillo-Rodriguez
 
4688_a.jpg
4688: scc
Christian Schaufelberger

 
4688_sock.png
4688: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

 
4688_spec.png
4688: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 2= 1946

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


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