The clock I posted keeps perfect time. Just the transformer runs way to hot. I haven’t changed all the rectifier diodes yet though
On Mon, Nov 18, 2019 at 09:23 alb.001 alb.001 <[email protected]> wrote: > one runs correctly, the 24 hour version runs fast > > thanks for the insights > > Phil B. > > ---------- Original Message ---------- > From: "'[email protected]' via neonixie-l" <[email protected]> > Date: November 18, 2019 at 9:57 AM > > Do they both run fast? Designs that simply count the mains are susceptible > to noise pulses adding to the total, and most early designs were prone to > this defect. If this is the case, I would try filtering out the noise > spikes: ferrites on the primary side, and a low-pass on the rectified line > frequency reference. (One exception was the CT-700x which could be made to > run little slow or fast, depending on the setting of the MUX rate.) > > On Sunday, November 17, 2019 at 3:53:02 PM UTC-8, philthepill wrote: > > I bought two different models of Heath Kit clocks with flat planar neon > displays. They were both plugged into two outlets on the same AC extension > cord and then the extension cord was plugged into a wall receptacle. One > runs as 24 hour clock, other one is a 12 hour clock After a few days they > are not at the same time and the longer they run the further apart they > get. I thought that they both used AC line frequency for timekeeping. Any > ideas, I'm stumped by this. > > Thanks Phil B. > > > > > -- > 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 on the web, visit > https://groups.google.com/d/msgid/neonixie-l/4381ac08-ade7-48d9-8c1a-6f530d7b3ff8%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/4381ac08-ade7-48d9-8c1a-6f530d7b3ff8%40googlegroups.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 [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/671611913.11791477.1574097823029.JavaMail.open-xchange%40mtlgui09 > <https://groups.google.com/d/msgid/neonixie-l/671611913.11791477.1574097823029.JavaMail.open-xchange%40mtlgui09?utm_medium=email&utm_source=footer> > . > -- [email protected] -- 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 on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAKYv7NSnCyW0SBjzeFhc-WqDeqLLf%2BhbjqBqL4Pep1aYfQy9Gg%40mail.gmail.com.
