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


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.


GA4 Spark Gap Tube
GA4 spark gap tube.

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