This is a truly amazing story of fixing a nearly 50 years old computer
https://www.theguardian.com/science/2024/apr/23/voyager-1-transmitting-data-again-after-nasa-remotely-fixes-46-year-old-probe
Unusual tube matched output pair in one glass container. I would think virtualy unobtainable. I have considerable experence of 7591 tubes in a Fisher 500C which sound great. Subject to the russian war the valves are still being made.
But more 829B on ebay than I would have expected
Get an HP Microserver 4 bay cheap as chips on ebay. Mine has been going over 10 years.
https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p4432023.m570.l1313&_nkw=hp+microserver&_sacat=0
What is especially horrifying about this is the way it was done. "You are the only one with problems". Then the auditor comes in declares you at fault locks you out of the system and takes away to all access to any paperwork. So you have no way to investigate or establish what has happened...
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