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ID = 71141
Tube type:  Luminous Quartz Resonator   Indication 
Identical to Ra10459_Leuchtquarz

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Technology / Measurement

Luminous Quartz Resonator

Due to the field produced by the piezo-electric charge, a very distinct glow appears on the surface of the quartz bar when its resonant frequency 3530.2 kHz is applied.

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Just Qvigstad

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