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The 6AF7G is a dual shadow magic eye tuning indicator very similar to the popular EM34.

The triode voltage amplifier sits below the display bowl.The pinch and pinch stem occupy about a third of the total length.

The Visseaux name on the base cap and the IO base pins.

Thanks to Mark Mallison for sending the images.

The wide glass envelope is  mm in diameter and, excluding the IO base pins is  mm tall.

Reference: Data-sheet & Data. Type 6AF7G was first introduced in 1939. See also 1939 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.