GA4 (Unknown Mfr.) Spark Gap Tube  
Written by AnubisTTP on 2010-01-19  

Description

The GA4 is a large spark gap tube of unknown specification. The two electrodes on either side of the envelope are designed to be removed, and are held in place by a pair of Allen screws. This tube illuminates purple when subjected to an electrostatic field, which suggests it is filled with either hydrogen or water vapor, depending on its original purpose.

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GA4 Spark Gap Tube
GA4 spark gap tube.

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