It looks like there is a metal-ish shroud behind the cathodes, and maybe that is the anode. You can confirm by applying reverse-polarity and see what glows; that's the anode.
Without the anode screen, do these tubes appear 'clearer' , and possibly brighter, when lit ? -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/6b59cab1-8805-4189-9464-b0a5760c635d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
