Problem resolved. Wall wart failure. Interesting case. Tiny "1 amp" 12v wall wart. I believe it to be the one delivered with the clock. So after many years of operation, something failed and the voltage output drops under load. With no IN-18's installed, the output stayed at 12v. Adding even 1 tube load to the clock, the output drops to about 5v. With a full complement of tubes, the voltage output drops low enough to cause the logic to continually reboot.
Found a 12v 450ma older style supply with the right connector. Seems to work, but I am noticing some loss of GPS lock. I should take the clock apart again and measure system voltages, but if you know these clocks, you'd agree that dismantling and re-assembling them is no picnic. Guess I'll be on the lookout for a 12v 1a rated supply. On Wednesday, May 7, 2025 at 6:06:24 PM UTC-5 Terry S wrote: > Got it, thanks to those who messaged me. > > On Tuesday, May 6, 2025 at 9:50:57 PM UTC-5 Terry S wrote: > >> My Nixichron has developed what appears to be a power supply problem. >> Anyone have the schematic? I did have it but can no longer find it. >> >> Thanks. >> Terry >> > -- 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/9df694c4-7ba3-4d05-a026-03baf82b04bbn%40googlegroups.com.
