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Country:Europe Manufacturer: Common type Europe tube/semicond. Designer: Philips; Eindhoven (tubes international!); Miniwatt Type: OTTODO Frequency converter Control (mu) Same as AK1 = A4GDR = TK1 = MO465 = WE21 = VAK1 = RAK1 = ACMO4 = L465 = 4A12_Ultron Similar tubes Normally replaced - small diff.: NMO46 ; O407 Other class quality (otherwise equal): TM-C6G Heater different: BK1 Other base: AK1_US-7pin ; AK2 ; FC4 Multiple differences or of other kind: G5 First series Mar.1934 Tube leaflet collection E.Erb Telefunken Fertigungsliste = 1934. First information Mar.1934 : Philips Bulletin #D13 Feb.1934 : All radio # 1 Replaces models RENS1224 E448 X4122 AK2 evolutions
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Europa Socket 7-Pin C7A (Hx C, C7, C) 1933 (Codex=Leo) Top contact with cap. Used via radio/TV reception etc. Filament Vf 4 Volt / If 0.65 Ampere / Indirect / Specified voltage AC/DC Description According to Telefunken's production list, the first production of the AK1 and AK2 took place in Berlin in 1934. Only one number for AK1 and AK2 together. By 1945 the factory had built 59,255 units. In 1945/46 there were another 11 and the following year one, for a total of 59,267. For first models in the original configuration, the first delivery factor for experimental configurations, including specific circuit suggestions from the manufacturer or developer Reöhern, has a different meaning depending on the time of year, which we do not know: Finished series devices in the same or following year. Weight 55 g / 1.94 ounces Citations 5 Citations (visible only to members) Bibliography Babani, International Radiotube Encyclopedia p. 48 and 49 Paperback for tube code 1948/49 Design = Philips Universal Vademecum, electronic valves and semiconductor devices
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Country:Europe Manufacturer: Common type Europe tube/semicond. Designer: Philips; Eindhoven (tubes international!); Miniwatt Type: OTTODO Frequency converter Control (mu) Same as AK1 = A4GDR = TK1 = MO465 = WE21 = VAK1 = RAK1 = ACMO4 = L465 = 4A12_Ultron Similar tubes Normally replaced - small diff.: NMO46 ; O407 Other class quality (otherwise equal): TM-C6G Heater different: BK1 Other base: AK1_US-7pin ; AK2 ; FC4 Multiple differences or of other kind: G5 First series Mar.1934 Tube leaflet collection E.Erb Telefunken Fertigungsliste = 1934. First information Mar.1934 : Philips Bulletin #D13 Feb.1934 : All radio # 1 Replaces models RENS1224 E448 X4122 AK2 evolutions
