G.L.A. 20750 Spark Gap Tube  
Written by AnubisTTP on 2006-10-11  

Description

The 20750 is a small spark gap tube in a cylindrical glass envelope. We can find no information on this device, but we suspect it was most likely used as an overvoltage protection system in some high power transmitter. The tube does not appear to be gas filled, and has no discharge when subjected to an RF field.

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GLA 20750 Spark Gap Tube
GLA 20750 spark gap tube.

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