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Identical to 78 = 78E = UZ-78 = UZ78 = A678 = VT-78 = AG78 = CV2544 = G78 Similar valves Other shape (e.g. bulb type): M78 Replaced normally - small diff.: 38078 ; T78 Other class quality (otherwise equal): 1604 Heater different: 24/78 ; 337A ; 88S Other base: 6K7G ; 78_Coronet First series 1933 The AWA Journal Vol. 7, 1992 First information Mar.1933 : -- Collector info (Sammler) Replaces models 58 Evolutions 6K7G 6K7 6K7GT 6K7MG
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Socket 6-Pin-Base U6A, old, USA (Codex=Kf) Top contact with a cap. Used for Radio/TV-reception etc. Filament Vf 6.3 Volt / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC Description Remote cutoff RF/IF amplifier. * RMA/JEDEC register record available by courtesy of TCA* - This tube was already listed by several manufacturers when RMA started its standardization in 1934. In order to characterize popular receiving types, manufacturers were asked to supply average characteristics as measured on production lots. Here are the filled answer forms supplied by Radio Valve Co., Raytheon, Sparton, Triad, Tung Sol, Ken Rad, Hytron and Arcturus. Full record is downloadable here. Dimensions (WxHxD) incl.pins/tip x 118 x 34 mm / x 4.65 x 1.34 inch Weight 38 g / 1.34 oz Bibliography Essential Characteristics, GE 1973 Tube Lore (II) p. 28 -- Collector info (Sammler) Taschenbuch zum Röhren-Codex 1948/49
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Identical to 78 = 78E = UZ-78 = UZ78 = A678 = VT-78 = AG78 = CV2544 = G78 Similar valves Other shape (e.g. bulb type): M78 Replaced normally - small diff.: 38078 ; T78 Other class quality (otherwise equal): 1604 Heater different: 24/78 ; 337A ; 88S Other base: 6K7G ; 78_Coronet First series 1933 The AWA Journal Vol. 7, 1992 First information Mar.1933 : -- Collector info (Sammler) Replaces models 58 Evolutions 6K7G 6K7 6K7GT 6K7MG
