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Sensibly equivalent to:
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Tuning Indicators
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The 3184 is a most unusual neon tuning indicator. Within the thin glass tube is a wire rod and a pair of circular electrodes. To function as a tuning indicator it produced a column of glowing plasma that changed length by virtue of a changing control potential.
See also the 3180 from Cossor.
The thin glass tube envelope is 12 mm in diameter and, excluding the base pins, is 91 mm tall.
References: Data-sheet & 4010. Type 3184 was first introduced in 1934.


Absolute Maximum Operating Conditions
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated September 04, 2013.
shape:thin.glass.tube construction:pinch type:tuning.indicator age:1930.1940 base: pin:
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