I was "shishlakji" on the old group, it's the same clock. Here is the schematic. The M62354 DAC may need a little explanation. It's a voltage output serial input DAC. The voltage reference is floating - does not need to be ground at one end - this is unusual in DACs. Here the reference is the voltage across diode D7. I jacked it up off ground for proper biasing of the long tail pairs, but I ended up giving them a negative supply, so any old DAC would do now. I have no idea where you could get a M62354 today -I just happened to have some in my junk box.
The 3LO1 tube life is definitely a phosphor problem. The phosphor layer is so thin it's practically transparent and the brightness fades from the center, where the beam traces over it most frequently. Towards the end of life the center doesn't glow and only the tips of the hands are visible. I don't know what such a short life tube could have been used for - perhaps an instrument on a weapon when they expected the next war to be over in 24 hours. -- 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 post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/4cb4fb07-68fa-427c-93fb-4691a75fa97d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
scope clock sch.pdf
Description: Adobe PDF document
