Antique radios, Old Time Radios
ARP9
| Base |
British-7-Pin, old (M7A) (Codex=Ndo)
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| Was used by |
Military and/or Government |
| Filament |
Vf 13 Volts / If 0.4 Ampere / Indirect |
| Information source |
Babani, International Radio Tube Encyclopaedia p. 50 & 51
Universal Vade-Mecum, Electron Valves and Semiconductor Devices p. 26
Taschenbuch zum Röhren-Codex 1948/49
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ARP9: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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ARP9: Manufacturer's Literature
Emilio Ciardiello
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