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The 'Magic Three' Valves
collections G8LSD Valve Collection |
This valve is badged as a Navy receiving valve, an NR83. Unlike most valves supplied for government service this exhibit is also clearly labelled with the commercial Type 6J7G.
The 6J7G is a contemporary of the Magic Three and almost as ubiquitous. Although originally designed as a detector its linear characteristic and good internal shielding (cf. 6Q7G) made it a natural choice for audio.
It was for two decades the international standard valve for audio amplifier input stages and audio systems generally.
A close look under the outer screening fails to reveal any detail.
The classic envelope is 38 mm in diameter and, excluding the IO base pins, is 95 mm tall.
Pin Connections
The 6J7G is a contemporary of the Magic Three and almost as ubiquitous. Although originally designed as a detector its linear characteristic and good internal shielding (cf. 6Q7G) made it a natural choice for audio.
It was for two decades the international standard valve for audio amplifier input stages and audio systems generally.
A close look under the outer screening fails to reveal any detail.
The classic envelope is 38 mm in diameter and, excluding the IO base pins, is 95 mm tall.
Pin Connections
It was for two decades the international standard valve for audio amplifier input stages and audio systems generally.
A close look under the outer screening fails to reveal any detail.
The classic envelope is 38 mm in diameter and, excluding the IO base pins, is 95 mm tall.
Pin Connections
