Re: [time-nuts] "When you google word ..."

I actually had the privilege of hearing David Allan present his theories in the yearly NIST conference in Boulder. Interesting fellow. One thing that was pretty cool is that NIST developed a fountain clock that is so accurate it is influenced by altitude. They had to raise the clock once to i

Re: [time-nuts] Frequency Counter Choice

Hi, I second this. You can read the calibration data out of the counter and save. I've done some experiments with that, but nothing conclusive, but I blame my lack of patience and not a proper setup. Do replace the battery, it is cheap and relatively easy to do. Would you loose this calibration,

[time-nuts] "When you google word ..."

Also when you google "alien deviation" you get: About 11,800,000 results (0.50 seconds) Cheers! :>) Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com a

Re: [time-nuts] HP 5345A Noise Floor

Hi According to page 1-3 in https://bama.edebris.com/download/hp/5345a/5345a_6.pdf The 5345 is a 2 ns counter. Roughly speaking, that normally gets you around 2x10^-9 at 1 second. That would suggest there is something a bit off in your

Re: [time-nuts] ES100 Atomic Clock Receiver Back in Stock

Just to be clear, is the ES-100 the receiver used in the Ultratomic clocks made by Lacrosse? Dana On Thu, Oct 29, 2020 at 7:38 AM Ben Hall wrote: > Good morning all, > > Universal Solder is showing the ES-100 WWVB BPSK clock kits back in > stock. Just put me one on order. :) > > < > https://

[time-nuts] HP 5345A Noise Floor

Hi All. While I’m waiting for a 5370B to come ( find it cheap and beautiful from France ) I’ve put my old 5345A on a trial, connecting both the Inputs to the 10 mhz out from an Oscilloquartz 3200 Cesium Oscillator. Those are the results. Please advise 😊 Regards, Giorgio. [cid:image001.gif@01D6A

Re: [time-nuts] ES100 Atomic Clock Receiver Back in Stock

Hi Just to be complete: They also have the “modules” as well. You can buy the full up Arduino device with display or (for less money) just the little board with the chip and a few vital parts on it. They claim to be testing 3,000 of them ….. Bob > On Oct 29, 2020, at 7:56 AM, Ben Hall wrote:

Re: [time-nuts] Frequency Counter Choice

For those who have the PM6681 (aka CNT81): check the 3V memory backup cell and replace it before the dreaded calibration lost (CAL LOST) will appear on the LCD. Replace the coin cell with great care (with the counter powered up), see the service manual for the procedure.

Re: [time-nuts] power supply for Z3801

On 10/28/2020 5:32 PM, jimlux wrote: > The 48-ish volt power supply for my Z3801 gave up the ghost.. > > What's the latest in off-the-shelf power supplies (external is fine, > uncased is fine)? > > There were plenty of suggestions on the list a few years back, and I > can pick one of those up, but

[time-nuts] ES100 Atomic Clock Receiver Back in Stock

Good morning all, Universal Solder is showing the ES-100 WWVB BPSK clock kits back in stock. Just put me one on order. :) Thanks much and 73, ben, k

Re: [time-nuts] power supply for Z3801

Hi I think you will find that most of this gear came in two voltage ranges. One version ran from about 20V to about 34V The other version ran from about 36V to about 56V. The first one gets called 24 or 28V. The second one gets called 48V. Both *should* be able to run off a pretty basic supply.