Re: [time-nuts] PLL performance?

Yes, this is not a spring powered clock with gears. The pendulum will be impulsed every N swings by a small weight. (Not yet sure what N will be.) Scott On Thursday, March 23, 2017 11:34:44 AM EDT paul swed wrote: > Hello to the group quite late to the discussion. Pretty interesting. > But I

[time-nuts] HP5061B Ion Current

https://www.febo.com/pipermail/time-nuts/2017-March/104374.html The patent that I posted at http://gonascent.com/papers/hp/US3323008.pdf has many interesting facts about the cesium beam tube. It says that the temperature of the cesium oven is 65° C. I researched the vapor pressure of cesium at

Re: [time-nuts] PLL performance?

Hello to the group quite late to the discussion. Pretty interesting. But I assume the drive for the pendulum is some impulse. Not the old mechanical clock with a spring for power. Regards Paul WB8TSL On Wed, Mar 22, 2017 at 7:48 PM, David Scott Coburn wrote: > I will not

Re: [time-nuts] WTB: GPSDO

On Thu, March 23, 2017 9:36 am, Nick Sayer via time-nuts wrote: > The splitters I’m using do have a 200Ω load on them. I know this > because PA6H modules recognize an external antenna and use it. I may have been thinking of a different receiver, according to the Thunderbolt manual I just

[time-nuts] HP5061B Ion Current

Things to be careful about! "I think the final vacuum improvement can be achieved more quickly if the cesium oven is on." The outgassing in a tube that has been off for an extended time is almost all from the oven filaments and the ionizer filament. The metal surfaces are virtual "sponges" and

Re: [time-nuts] PLL Digital Loop Filter

This has been a great conversation as I have tinkered with classical filters forever. But the fact is with micros so cheap the flexibility they add to the loop filtering is quite nice. Essentially droop-less filters with silly time constants and then other math on the data. That may or may-not

Re: [time-nuts] Time Dilation tinkering

Not mentioning that the clock traveled in a passenger seat (even with the seat belt fastened). The vision of a big box with cables and a good sized clock ticking (it was a Patek Philippe movement in early HP Cesiums) frightened some passengers and the person accompanying the clock had to

[time-nuts] live online phase-noise class; general interest articles

For anyone interested in an introductory class on phase noise, I'm teaching an online class with live instruction (with video recordings in case you miss a class) titled "Phase Noise Fundamentals." https://www.jitterlabs.com/support/training Register with the coupon code TIMENUTS1704 to receive

Re: [time-nuts] WTB: GPSDO

The splitters I’m using do have a 200Ω load on them. I know this because PA6H modules recognize an external antenna and use it. > On Mar 22, 2017, at 3:20 PM, Chris Caudle wrote: > > On Wed, March 22, 2017 3:52 pm, Nick Sayer via time-nuts wrote: >> My thunderbolt

Re: [time-nuts] DCF77 Analyzer/Clock

They may be missing out on coding efficiency but they sure are not missing out on a really nice looking project. My projects never look like that. I don't have a clue to that quality of workmanship. Though today I think its much easier then it used to be. Regards Paul WB8TSL On Thu, Mar 23, 2017

Re: [time-nuts] Time Dilation tinkering

Hi Back before GPS and similar systems, hauling Cs standards on commercial aircraft was a bit more common than it is today. One of the critical tricks of the trade was knowing where each power outlet was on a specific plane and how close it was to this or that seat. The next trick was knowing

Re: [time-nuts] DCF77 Analyzer/Clock

In message <20170323041013.ga4...@panix.com>, Ron Bean writes: >http://hackaday.com/2017/03/22/well-engineered-radio-clock-aces-form-and-function/ > >https://create.arduino.cc/projecthub/edr1924/dcf77-analyzer-clock-v2-0-c25404 He/They are missing out on a very big S/N improvement for

Re: [time-nuts] WTB: GPSDO

Hi, On Wed, Mar 22, 2017 at 05:20:31PM -0500, Chris Caudle wrote: > On Wed, March 22, 2017 3:52 pm, Nick Sayer via time-nuts wrote: > > My thunderbolt *insists* on being on the DC Pass port. If you put it on a > > DC Block port (yes, something *else* is on the DC pass port and supplying > > DC

[time-nuts] DCF77 Analyzer/Clock

http://hackaday.com/2017/03/22/well-engineered-radio-clock-aces-form-and-function/ https://create.arduino.cc/projecthub/edr1924/dcf77-analyzer-clock-v2-0-c25404 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to