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ID = 7285
Brand: Common type Worldwide tube/semicond.
Developer: Triad Television & Mfg. Co.; Pawtucket, RI 
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to 5Z4MG
Similar Tubes
Other shape (e.g. bulb type):
  5Z4 ; 5Z4GT
Differences not known by us:
First Source (s)
08.Jul.1935 : Electron Tube Registration List 34

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vn)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 2 Ampere / Half indirect
Description Glass bulb inside a metal envelope. 
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
5Z4MG: W.E.
Wolfgang Eckardt

5Z4MG: Telefunken Werkstattbuch
Wolfgang Bauer


from Just Qvigstad

Usage in Models 8= 1935 ; 1= 1936?? ; 1= 1936? ; 42= 1936 ; 1= 1937?? ; 2= 1937? ; 3= 1937 ; 1= 1942??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):59

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