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615_Marathon

Information - Aide 
ID = 30812
       
Pays:
Etats-Unis
Fabricant: Marathon (tubes), Northern Manufacturing Co.; Newark, NJ
Concepteur: Marathon (tubes), Northern Manufacturing Co.; Newark, NJ 
Type:  Triode, vacuum 
Identique à 615_Marathon

Culot UX-Base (4 Pins (2 thick, USA 1924) 2 connexions latérales.
Utilisé par Radio/TV-reception etc.
Chauffage Vf 5.5 Volt / If 1 Ampère / Indirect
Description

Early AC tubes for conversion of battery radios. The filament was connected to side terminals on the tube base. Usually sold with a Marathon AC kit, consisting of a cable with the necessary clips to connect the heaters. This tube has an amplification factor of 12, anode impedance of 19000 Ohms and mutual conductance of 635 micromhos.

 
Bibliographie Saga of the Vacuum Tube, Tyne   Page 345

marathon_ac_ux_base~~1.png 615_Marathon: Fin Stewart
Fin Stewart


Just Qvigstad
 

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