I've seen similar partial illumination on other tubes like 8971s. I think that could be more than cathode poisoning, possibly outgassing. Hard to tell unless you try reviving the tube with higher than normal current.
For over $3K USD it ought to be flawless. On Sat, May 15, 2021, 6:00 AM Robert <robnorman...@gmail.com> wrote: > Not mine and suffering from cathode poisoning on some digits > > https://www.ebay.co.uk/itm/194127286995 > > > 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 neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/EA61E374-FF7D-4925-95DA-9E34785FEFB2%40gmail.com > <https://groups.google.com/d/msgid/neonixie-l/EA61E374-FF7D-4925-95DA-9E34785FEFB2%40gmail.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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CALcVLKJWc9eW2wUbVXNtfa33dsGw_2w0mnOYT7gMtydtdDae5g%40mail.gmail.com.
