Re: [time-nuts] Quiet clocks, noisy clocks

2019-01-05 Thread MLewis
And somewhere out on the net, instead of "novelty" or "alternate timebase" clocks, for a "normal" clock someone was putting a DS1302 or a D1307 into the mini quartz movement. I'd love to see a DS3231 dropped in for that task. DS1307 ~5 minutes per month DS3231 ~few minutes per year, +/-2 ppm,

[time-nuts] Atomic Clocks: It is important that they keep good time, Part 1

2019-01-05 Thread Mark Sims
Lady Heather does have an audible "tick" clock mode. It ticks on the second and beeps on the minute. The ticks and beeps are fairly well synchronized to true time. You can also set the clock name displayed on the analog clock display... Mine is usually set to Patek-Philippe.

Re: [time-nuts] Quiet clocks, noisy clocks

2019-01-05 Thread paul swed
That is interesting. Thank you On Sat, Jan 5, 2019 at 4:59 PM Ron Bean wrote: > paul swed writes: > > >Not sure who it would be but the reason to want to use a 1 pps step is its > >easy to clock. > > As a side note: There's a replacement driver board on Tindie that uses > an Arduino clone to

Re: [time-nuts] Quiet clocks, noisy clocks

2019-01-05 Thread paul swed
Ron Not sure who it would be but the reason to want to use a 1 pps step is its easy to clock. Though the fact that its 2 phase like you have in the pulse makes it tougher. The tick is the second. On a multi-step clock how do you phase the second hand. Visually but complicated through a slew

[time-nuts] Quiet clocks, noisy clocks

2019-01-05 Thread Ron Bean
A recent thread talked about noisy clocks (1 tick per second). Some of you may have noticed that it's now possible to buy cheap quartz clock movements that have a continuous-sweep second hand, and don't tick once per second. For example, klockit.com sells two different brands (Seiko and

Re: [time-nuts] VHF-UHF Frequency Calibrator

2019-01-05 Thread Gary Woods
On Fri, 4 Jan 2019 14:49:39 -0800, you wrote: >The 12AT7 dual triode tube used as the oscillator has the crystal connected >between the two cathodes, a configuration I >haven't seen before. Sounds like a Butler oscillator; very popular with Navy avionics back in the day of those glass NPN