Antique radios, Old Time Radios
615_Marathon
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Country:
United States of America (USA)
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| Identical to |
615_Marathon
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| Base |
UX-Base (4 Pins (2 thick, USA 1924, UX)
2 Sidecontacts.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 5.5 Volts / If 1 Ampere / 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.
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| Information source |
Saga of the Vacuum Tube, Tyne Page 345
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615_Marathon: Fin Stewart
Fin Stewart
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Just Qvigstad
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| Data Compliance |
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