Ask Jeff Thomas. He dissected one and wrote it up. I think it has software bugs.
David Forbes http://www.cathodecorner.com/ On Mar 17, 2012, at 12:55 PM, James <[email protected]> wrote: > A friend just dropped by with a Karlsson clock that he says is losing > about a minute a day. It was the first time I've seen one of these in > person and I'm not familiar with the circuit. I'm impressed by the fit > & finish, but underwhelmed by the performance. The tubes glow dim and > look almost grayish, clearly multiplexed with noticeable flicker when > I scan my eyes past it. Nowhere near as attractive as the bright, > sharp directly driven tubes in all the clocks I've built. > > Anyway has anyone here worked on one of these before? Is the timing > derived from the power line or does it use the CPU clock crystal? I > checked the one electrolytic capacitor and it tests fine for ESR. Did > a visual examination and don't see anything amiss. Figured I'd ask > around before I get out the scope and start poking around. > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To post to this group, send an email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/neonixie-l?hl=en-GB. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
