NL-5557/FG-17/5557 Thyratron tube heavy duty dual getter US seller
5557 FG17 tube NL-5557/ 5557/FG17 tube (1) pc copy of the original GE thyratron rectifier tube, unique dual getter design for greater stability, heavy duty used in heat sealing and other industrial applications.
5AR4/GZ34 Psvane rectifier tube tested new black base
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