[time-nuts] Timelab file needed

Does anyone have a timelab file for a KS-24361?  My KS has a much worse 1s ADEV (and on down the line) than I would have expected, and I'd like to see what others are getting. Bob AE6RV.com GFS GPSDO list:

Re: [time-nuts] Line Frequeny Stablity

Hi, Ok, quick intro to the frequency steering. There still remains rules that say that network frequency should be on average 60 Hz on the US grid. (Yes, there is proposals to remove it, but it is still effective.) Since the generation (let's talk traditional here not to make things more

Re: [time-nuts] TAPR TICC boxed (input protection)

David wrote: So collector-base junctions make good low leakage high voltage diodes although they are slow I guess it depends on what one means by "slow" and "fast." The B-C junction of an MPSH10/MMBTH10 or 2N/PN/MMBT5179 switches on in <1nS and off in <2nS, which is comparable with Schottky

Re: [time-nuts] Sinlge ADC multi-band receiver

Hi Galileo E5 is a bit of a strange case. It’s really E5a and E5b. You can either grab it all as one giant signal or as two separate signals. You may (or may not) care about the data on E5a or b depending on what you are trying to do. Getting the entire very wide signal likely has some

Re: [time-nuts] Line Frequeny Stablity

Hi Well ok, the rest of the story …. The process of watching the line voltage slip lead me to buy my first “frequency counter”. It was a 1950’s vintage tube based Beckman “EPUT Meter”. I doubt it cost me over $40 at the time. It was well used but still functional It clocked away on a

Re: [time-nuts] Line Frequeny Stablity

A fun way to monitor the state of the grid is to watch the web site of the Power Information Technology Laboratory at the University of Tennessee , Their site lists in both tabular and graphical (map) form the frequency of the grid. Most of it is

Re: [time-nuts] Line Frequeny Stablity

There is a pretty nice "How it Works" video on steam turbines. As Pete mentions they use valving to control the speed of the turbines, interesting how they reheat the steam for the high/medium/low stages. https://youtu.be/SPg7hOxFItI -=Bryan=- From:

Re: [time-nuts] Spirent STR4500 GPS simulator

Hi Just to clarify a bit: These gizmos fall into two broad categories: 1) The single sat simulators like the GSS6100 that show up cheap. 2) The full constellation simulators that show up for a bit more money. The single sat stuff is simple to run from a serial port and limited in function.

Re: [time-nuts] Line Frequeny Stablity

On 4/4/17 2:28 PM, Thomas D. Erb wrote: Thanks for the info. So that tells me how data is recorded - but not how the frequency is kept stable ? Is the line frequency now directly tied to GPS clock - with no drift ? The line frequency is adjusted, for the most part, by adjusting the prime

Re: [time-nuts] The ultraAtomic clock for home

Will say that is pretty interesting that it takes either 2 or 4 c cells. It appears they parallel the C cells for more time. In eco mode 2 batteries 3 years or 4 batteries 6 years. Run time will vary depending on the batteries leaking in 3.5 years. At least it seems that way today. (Not to trigger

Re: [time-nuts] The ultraAtomic clock for home

On Wed, Apr 5, 2017 at 7:30 AM, Bob kb8tq wrote: > I’m still a bit unclear on how many people will set up a wall of clocks > running > on a dozen or so time zones. Obviously the people making clocks are > very much in favor of doing that > It's probably for flashy newsrooms,

Re: [time-nuts] The ultraAtomic clock for home

Why? oh why? is this only available as an analog clock?? I am wondering if Lacrosse only has the rights to an analog version and that a higher priced digital version will show up in some "professional" line from another vendor. This is at least a plausible theory because this is a well known

Re: [time-nuts] Spirent STR4500 GPS simulator

Phil Welcome to the group. Funny you mention the Spirent. I see many available for semi reasonable pricing though for Ham/Time-nuts a bit pricey still at $295 for a tinkerer. And they do not come with the disk. But as was pointed out to me by a fellow time-nut you don't need it. You can directly

[time-nuts] Line Frequeny Stablity

I actually have a 1930's unit in my clock collection - and in the 1980's we used to make an AC power clock in a panel next to a quartz clock for small island frequency control. This is a link to my master clock http://electricclock.omeka.net/items/show/6 I'm just wondering how is it set now ?

Re: [time-nuts] Line Frequeny Stablity

I would guess the tightest control loop is on the generator stator field windings, with mechanical control being secondary. Definitely a lot of poles and zeros to worry about. On Wed, Apr 5, 2017 at 9:01 AM, jimlux wrote: > On 4/4/17 2:28 PM, Thomas D. Erb wrote: > >>

Re: [time-nuts] Line Frequeny Stablity

The response time in a large plant is very slow. Large steam plants running at steady state are running with their steam valves wide open. A partially closed valve is an energy loss and is only used when changes occur. The power control for a plant running at a steady load is the amount of

Re: [time-nuts] Line Frequeny Stablity

I have seen some proposals to require VAR capability in photoelectric installations but how feasible is that? I cannot imagine utility customers being pleased with having to pay extra for such a nebulous to them capability. I could see the utility companies pushing it as a requirement in lieu of

Re: [time-nuts] Sinlge ADC multi-band receiver

Hi, There are many things to be done before attempting the full E5 approach anyway, so I would not have make it a make or break for a first design. Cheers, Magnus On 04/05/2017 02:27 PM, Bob kb8tq wrote: Hi Galileo E5 is a bit of a strange case. It’s really E5a and E5b. You can either

Re: [time-nuts] Line Frequeny Stablity

The rotary generators in a system of connected generators are synchronous machines. There is no frequency difference between them, only phase angle, and not much of that - if the system is stable. The ocean liner analogy is correct, as there is only one captain directing the ship's course. If

Re: [time-nuts] TAPR TICC boxed (input protection)

On Wed, 5 Apr 2017 02:40:13 -0400, you wrote: >David wrote: > >> So collector-base junctions make good low leakage high voltage diodes >> although they are slow > >I guess it depends on what one means by "slow" and "fast." I was referring to within the same transistor; emitter-base junctions are

Re: [time-nuts] Spirent STR4500 GPS simulator

Hi Phil, I just wanted to chime in an make a note that the STR4500 seems to have USB connection rather than serial. The manual mentions installing a driver. I wonder if the USB port is nothing but a glorified serial port. When you hook it up, what does your computer report? You should be able

Re: [time-nuts] Spirent STR4500 GPS simulator

Hi To the extent that the device runs like a 4100 or a 6100, it does not need any software to support it. The same may be true of the 6300. They all run from a drop dead simple serial command set. On the 6100 you fire up a terminal program at 38.4 K baud 8N1 and type away. All of the features

Re: [time-nuts] Line Frequeny Stablity

Think of it as an ocean liner trying to keep a dead straight course to it's destination. It weighs many tons and wind and waves may drive it off it's path but the captain can correct for this. It eventually arrives at it's destination and is only a few feet from the dock. The total rotating

Re: [time-nuts] The ultraAtomic clock for home

In the office where I work, they have 5 clocks on the wall showing local time here at HQ and at 4 other company sites. It is embarrassing that the clocks are always a few minutes off from each other. I can see where these would make sense. Rick N6RK On 4/5/2017 4:30 AM, Bob kb8tq wrote: HI

Re: [time-nuts] The ultraAtomic clock for home

kb...@n1k.org said: > UTC I understand. I’ve used that feature on “atomic” clocks in the past. > I’m still a bit unclear on how many people will set up a wall of clocks > running on a dozen or so time zones. Obviously the people making clocks are > very much in favor of doing that :) I

Re: [time-nuts] The ultraAtomic clock for home

Hi > On Apr 5, 2017, at 9:00 AM, Jim Harman wrote: > > On Wed, Apr 5, 2017 at 7:30 AM, Bob kb8tq wrote: > >> I’m still a bit unclear on how many people will set up a wall of clocks >> running >> on a dozen or so time zones. Obviously the people making

Re: [time-nuts] The ultraAtomic clock for home

Hi The Lacrosse wall clocks I’m using now are hybrid analog / digital displays. You get the time analog and the date off the digital display. For whatever reason, that model is now history. Bob > On Apr 5, 2017, at 11:30 AM, Richard (Rick) Karlquist > wrote: > >

Re: [time-nuts] USB protocol for digital logic events, measurement

Hi George, On 6/4/17 09:47, George McCollister wrote: Can anyone recommend a self describing, device/vendor independent USB protocol standard for transferring digital logic events timestamped relative to 1pps as well as voltage and current measurements and digital output controls (latched or

Re: [time-nuts] Spirent STR4500 GPS simulator

Hi > On Apr 5, 2017, at 1:36 PM, Magnus Danielson > wrote: > > Hi Phil, > > I just wanted to chime in an make a note that the STR4500 seems to have USB > connection rather than serial. The manual mentions installing a driver. I > wonder if the USB port is

[time-nuts] Spirent STR4500 GPS simulator

This is my first post after lurking for quite a while reading & trying to get to grips with the technology. I just purchased a Spirent STR4500 GPS simulator along with a pile of other kit. Unfortunately the CD was missing (no great surprise) & Spirent are not interested in selling me a

Re: [time-nuts] Sinlge ADC multi-band receiver

On 04/05/2017 01:21 AM, Attila Kinali wrote: On Tue, 4 Apr 2017 06:55:24 -0700 jimlux wrote: So those folks were trying to use 1 ADC for all three bands, so they had to choose a sampling rate that lets them separate the signals later in software. But that ADC is a

Re: [time-nuts] The ultraAtomic clock for home

HI UTC I understand. I’ve used that feature on “atomic” clocks in the past. I’m still a bit unclear on how many people will set up a wall of clocks running on a dozen or so time zones. Obviously the people making clocks are very much in favor of doing that :) Bob > On Apr 4, 2017, at 7:56 PM,

Re: [time-nuts] TAPR TICC boxed

The gold standard is a random pulse source. Using something like a SPAD as the source of random pulses is popular as the average rate can be easily adjusted by changing the light level. It also avoids using radioactive sources. Bruce > On 03 April 2017 at 15:05 Bruce Griffiths

Re: [time-nuts] The ultraAtomic clock for home

Yes its quite common. The clocks are always off by sometime and generally never account for winter and summer time. Lastly ooops the ole batteries dead or corroded. In Broadcast facilities all of the clocks are actually driven by synchronized time codes. Either LTC or IRIG. The clocks can be

Re: [time-nuts] Line Frequeny Stablity

Hi Back in high school, one of the radio club members figured out that the “clock adjustment” took place locally between 4:30 and 5:00 PM. Needless to say, pretty much everybody spent the next week listening to WWV and watching the clock’s second hand go out of sync with the beeps. This was

Re: [time-nuts] Line Frequeny Stablity

On 4/5/17 11:13 AM, Bill Hawkins wrote: The rotary generators in a system of connected generators are synchronous machines. There is no frequency difference between them, only phase angle, and not much of that - if the system is stable. Yes.. basically a bunch of coupled oscillators, and

Re: [time-nuts] Line Frequeny Stablity

preilley_...@comcast.net said: > When I installed power plants in the 1970's they has a special "clock" that > showed the cumulative error in terms of clock time. How big were the grids back then? What was the typical range of error over a day or month? > If the generator ran a little too

[time-nuts] Hot Wire Ionizers

https://www.febo.com/pipermail/time-nuts/2017-April/104600.html I posted this patent assigned to Frequency Control Corporation on hot wire ionizers at http://gonascent.com/papers/hp/hp5061/US3433944.pdf . They must have been an HP competitor in the 1960s. It discusses the physics of cesium

Re: [time-nuts] Line Frequeny Stablity

In college we had a Vax 11/730 that would freak out and reboot the same time every day. Turns out the culprit was the sync pulses put on the AC for synchronizing the classroom clocks...But it took DEC a few weeks to find the culprit. > On Apr 5, 2017, at 17:12, Bob kb8tq

[time-nuts] USB protocol for digital logic events, measurement

Can anyone recommend a self describing, device/vendor independent USB protocol standard for transferring digital logic events timestamped relative to 1pps as well as voltage and current measurements and digital output controls (latched or pulse)? So far SCPI over USBTMC seems to be the closest