STC GN-5A

The GN-5A (military code CV5351) is a large top-viewing Nixie tube produced by the British manufacturer STC and marketed under the &ldquo;Nodistron&rdquo; brand. It succeeds the GN-1 and GN-2 models, maintaining the same pinout and compatible electrical specifications. A distinguishing feature of the GN-5A is the faint bluish glow emitted by its illuminated digits, indicating the presence of…