I have a few where the thin metal strip connecting the Anode pin, with the thin glass tube surrounding it, having been blown off, only the welded portions are left on the pin and the Anode cage, everything else is gone!
I guess someone has tried to blow a short open and instead blew this thin metal strip like a fuse - bought the B-7971's from an eBay seller, who ofcourse didn't know anything, but eBay/Paypal refunded me in full. The same seller later sold fully working B-7971's he claimee but I steered clear of those auctions. /Martin On Sunday, 20 July 2025 at 12:03:22 UTC+2 Adam Piórko wrote: > I once tested a B7971 tube that seemed dead. After cleaning the pins with > a fiberglass brush, it started working. > > Adam > > sobota, 19 lipca 2025 o 16:23:15 UTC+2 Robert napisał(a): > >> I assume this one has failed near one of the pins >> >> >> Rob >> >> On 19 Jul 2025, at 15:15, gregebert <[email protected]> wrote: >> >> Sometimes it's possible. I have 2 totally dead 7971's. One has a >> slightly visible crack at the base of a pin, so the gas is contaminated. >> The other one has no visible damage, and holding near a plasma globe has no >> effect, either. >> >> >> >> On Saturday, July 19, 2025 at 6:54:47 AM UTC-7 Robert wrote: >> >>> Is that possible. Looking through some B7971’s and found a completely >>> dead one, don’t remember buying a dead one, anyway visually looks okay, no >>> broken stem or cracks. >>> >>> Thanks >>> Rob >> >> -- >> 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 [email protected]. >> To view this discussion, visit >> https://groups.google.com/d/msgid/neonixie-l/b8d7e889-d1e3-4987-89f9-c7279e3cb9d8n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/neonixie-l/b8d7e889-d1e3-4987-89f9-c7279e3cb9d8n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> -- 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 [email protected]. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/000c4b5c-3727-45cc-8fbf-76d70f34faben%40googlegroups.com.
