Type CV1936 (commercially the 6J7) is a contemporary of the 'Magic Three'.Originally designed as a detector its linear characteristic and good internal shielding (cf. 6Q7GT) made it a natural choice for audio. It was for two decades the international standard valve for small signal audio amplifier stages.
The reverse is protective paint over the steel envelope.The thin metal tube envelope is 25 mm in diameter, and excluding the IO base pins, is 63 mm tall.References: Data-sheet, 1040 & 1043. |
