[time-nuts] Re: What's the best HP OCXO for frequency counter reference?

Related to that .. If you use the ovened oscillator for temporary use away from the home GPSDO, how good will the oscillator be with those interruptions to power / temperature, and will it stabilise during the period you're using it there ? I don't know what the vales are, but I'd suggest the

[time-nuts] Re: Noise down-converter project

It looks identical to my Agilent U1732B, thjough I think the Agilent's spec is poorer. It was replaced by a U1732C which may be closer thjough both are going back a way now. Presumably Agilent badged it and it has continued to improve. I don't know whether there's a corresponding Keysight version.

[time-nuts] Re: Time Signal Transmitter (low power)

Would a loop surrounding the watch (like an induction loop system for hearing aids) help keep the radiation lower ? On Tue, Jan 25, 2022 at 6:14 PM Bob kb8tq wrote: > Hi > > It’s not clear that the regs in Australia would care about > doing this in an area not covered by this or that time

[time-nuts] Re: Where do people get the time?

> > > > How far off does the audio have to be before it doesn't look/sound right? > How > accurately does the typical movie process get things aligned? > > Are people sensitive to the sound being early? > Pretty sensitive, I think. We forgive a lot of poor lipsync on youtube or live TV but we

[time-nuts] Re: Where do people get the time?

Thanks for that, an enjoyable lecture ! Does anyone know more about the question at 1:05:50 - a difference between GMT and 'London time' used by airlines ? The questioner seemed sure it wasn't daylight savings, but I live only half a degree east of the meridian and am not aware of any other

[time-nuts] Re: Clock display on Linux systems?

SD cards used in dashcams also suffer severe rewriting behaviour. I believe there are reviews and comparisons covering various makes in this application. On Wed, Dec 8, 2021 at 9:30 PM Kevin Rowett wrote: > The sandisk extreme sd cards have an excellent wear leveling algorithm. > > KR > > > >

[time-nuts] Re: Clock display on Linux systems?

On Wed, Dec 8, 2021 at 9:41 PM Lux, Jim wrote: > > When last I was looking at this, it turns out there's a bunch of > non-traditional display shapes available for things like "Shelf edge > displays" and such. That is the google-able phrase to turn up stuff. > >

[time-nuts] Re: 10 mhz distribution

I have used some TV baseband distribution amps. The first one I tried wasn't good though, due to it's DC restoration function, based on the sync tips. It resulted in distortion towards the positive end of the 10MHz sin, though it may be possible to find a compromise signal strength that is OK, or

[time-nuts] Re: in-ground clock room

Doesn't that depend on the configuration of the fields ? For instance, a pair of facing like poles will repel and, as you say, make a good spring. But a magnet falling down an aluminium tube will go slowly, because of the generated eddy currents and their subsequent fading due to the lossy

Re: [time-nuts] Old Crystal.

I've got one with a similar shape crystal wafer but packaged in a glass HC6/U package. However most of the glass-packaged crystals I've seen have been in a small vacuum-tube style package with a long, narrow strip of crystal. I think 16kHz is the lowest I've seen. On Mon, Mar 1, 2021 at 12:10 AM

Re: [time-nuts] Mains Frequency

I wouldn't be surprised to find that streetlight clocks use the same old Sangamo or Venner electromechanical timers that they've always used, and are far more of a problem to correct than domestic clocks. Andy, what equipment do you use to monitor the cycle count ? On Fri, Feb 12, 2021 at 2:55

Re: [time-nuts] small multi-timezone display

I saw this multi-zone clock mentioned today : https://www.electronics-lab.com/arduino-nano-33-iot-based-ntp-world-clock/ It's not a ready-to-go product nor is it as simple as 4 COTS clocks. It's possibly also harder to put together than Didier's suggestion, which could run on a raspberyy pi with

Re: [time-nuts] Frequency Counter Choice

On Mon, Nov 9, 2020 at 6:18 PM Rex wrote: > > Then I sent *PUD? > and got > #261 CALIBRATED: 2006-11-07, CALPLS: 4.25 ns, TMP: +22 °C[LF] > where the [LF] at the end is not literal, it represents the line feed > char 0x0a. > > ... > There is one odd thing I see though. The last two of #261 is

Re: [time-nuts] Thunderbolt E failing

I received one of these thunderbolts. It seems to work (currently handicapped by an inadequate antenna) and is labelled P/N 48050-61 D/C 0331 on the outside. The firmware is 3.00 and the OCXO labelled 37265 10.00 MHz B11859-17495 0310. On Sat, Sep 12, 2020 at 10:43 PM Adrian Godwin wrote

Re: [time-nuts] Thunderbolt E failing

But doesn't the compensation help generate a feed-forward term, a way to make the integrator better managed ? On Sun, Sep 13, 2020 at 2:31 PM Bob kb8tq wrote: > Hi > > The point is that there is no need to compensate the part while it is > locked. > It meets all the specs required of it by

Re: [time-nuts] Thunderbolt E failing

( No I don’t know either …. :) ). > > Bob > > > On Sep 12, 2020, at 12:28 PM, Adrian Godwin wrote: > > > > I've been looking for a thunderbolt for a while, mostly because they're > > such a benchmark within this group. I missed the period when they were > more &

Re: [time-nuts] Thunderbolt E failing

I've been looking for a thunderbolt for a while, mostly because they're such a benchmark within this group. I missed the period when they were more commonly available and have mostly found ones that were a lot more expensive, or had a large delivery cost due to being in Australia. Some cheaper

Re: [time-nuts] Spectrum Software Micro-Cap downloads

I think this discussion happened several months ago when MicroCap was released. Probably not worth restarting the argument (yet ?) On Sat, Sep 12, 2020 at 2:17 PM Bob kb8tq wrote: > Hi > > One *might* consider reaching out to those winding down Spectrum and see > if they might be willing to

Re: [time-nuts] Time Interval Counter(?) for high-precision watch measurement

I have seen, many years ago, a watch/clock tester that picked up the 32768 Hz signal with a ferrite coil and displayed beat frequency against its internal standard by rotating a ring of LEDs. It was a cheap handheld device : I can see similar devices online which are more expensive and are

Re: [time-nuts] Raspberry Pi NTP server

On Wed, Jul 15, 2020 at 7:25 PM jimlux wrote: > > I use teensy boards (pjrc.com) for this kind of thing (Arduino sort of, > but much, much more - much faster processor with more resources, and > physically smaller). > > I've used Teensy 3.1s and 3.2s - but a Teensy LC for $12 might do it. >

Re: [time-nuts] Raspberry Pi NTP server

Is there any way for a USB device to synchronise with the CPU clock (perhaps via the USB framing) so that a special-purpose device could timestamp the PPS occurrence with respect to CPU time ? On Mon, Jul 13, 2020 at 9:51 PM Trent Piepho wrote: > On Mon, Jul 13, 2020 at 8:54 AM Petr Titěra

Re: [time-nuts] Vibration isolation of quartz oscillators

Would a mechanical image-stabilisation system work ? https://en.wikipedia.org/wiki/Image_stabilization#Stabilizing_the_camera_body On Sat, Jun 27, 2020 at 7:58 PM Tom Van Baak wrote: > Michael, > > These are really good oscillators so in addition to guessing what sounds > like a good solution

[time-nuts] Teensy 4.1

I just saw an update to the Teensy microcontroller line. Teensys are somewhat like an arduino but generally with faster processors and more memory. The latest one, 4.1, has an ethernet interface with IEEE1588 packet timestamping. https://www.pjrc.com/category/news/ I'm not on pjrc's staff etc,

Re: [time-nuts] New Thunderbolt monitor

There are many injection moulded cases for raspberry pi boards now, but earlier on it was common to make them from slices of laser-cut acrylic like this one : https://learn.pimoroni.com/tutorial/sandyj/pibow-zero-assembly If you don't have access to a laser cutter via a hackspace or similar,

Re: [time-nuts] - LightSquared is back now called Ligado

Some of the history is in the wikipedia article for Ligado. Sounds like someone with money to spend on spectrum wants to break into the market and will push until they manage it. Given that Obama invested in them I'm surprised the present administration isn't running them into the ground, but it

Re: [time-nuts] OCXO and fluctuations after EFC adjustment

On Sun, Apr 12, 2020 at 1:11 AM Richard (Rick) Karlquist < rich...@karlquist.com> wrote: > > By now, few people besides Bob are still reading this. :-) > > > On the contrary :) Personally I'd love to read about the problems seen, debugged and fixed in the manufacture of any generation of high

Re: [time-nuts] Power glitch - Sat morning

On Wed, Apr 1, 2020 at 6:49 PM Arnold Tibus wrote: > > If so would there be any benefit to monitoring the frequency of each > phase ? > > No, because the 3 phases are generated and provided via 3phase > transformers in the village together (fixed 120°)! > > The effect on a large machine if the 3

Re: [time-nuts] Power glitch - Sat morning

Here in UK, no. It's available at extra installation cost and some people with a big lathe or other machinery have it as do farms and industrial locations. But the typical domestic house doesn't : phases are commonly distributed down the street with progressive phases on each property. On Wed,

Re: [time-nuts] Yukon to make Daylight Saving Time permanent after final time change Sunday

Since the borders are political rather than purely geographical, the obvious answer is to put the data in the GPS receiver's map database. It has both the relevant borderlines and the most frequent update strategy. On Fri, Mar 6, 2020 at 6:36 PM Steve Allen wrote: > On Fri

Re: [time-nuts] Yukon to make Daylight Saving Time permanent after final time change Sunday

Sadly, there's a substantial part of the British public that wants us to change to DST and double-DST. So we might end up with Greenwich not being on GMT. On Fri, Mar 6, 2020 at 4:12 PM David Van Horn via time-nuts < time-nuts@lists.febo.com> wrote: > GMT EVERYWHERE!! > > -- > David VanHorn >

Re: [time-nuts] Yukon to make Daylight Saving Time permanent after final time change Sunday

Would it be too pedantic to say they're ending DST but changing their timezone ? On Thu, Mar 5, 2020 at 9:03 PM Peter Vince wrote: > I've just seen a news item on the Ganadian Global News website announcing > that the Yukon will remain on Daylight Saving Time indefinitely after the >

Re: [time-nuts] Odd-order multiplication of CMOS-output OCXO

On Mon, Jan 20, 2020 at 12:49 AM Magnus Danielson wrote: > > I would be very interested to do exactly that. I've actually had issues > getting the Prologix do things exactly as I want, and I blame that on my > inability to focus long enough to read the manual to understand it > properly. The

Re: [time-nuts] PLL suggestions

Even with a smaller device it's possible : you can sometimes repurpose crystal and reset pins to be I/O, do a software SPI, and set registers using write-only methods (MOSI but no MISO connection) to get down to 2 or 3 pins used. On Wed, Jan 1, 2020 at 1:54 PM Graham / KE9H wrote: > On Tue, Dec

Re: [time-nuts] Chinese NTP Time server

Sorry, that should have been '10base2 ethernet card' On Sun, Dec 22, 2019 at 11:16 PM Adrian Godwin wrote: > Voltage converter might be one of these : > > https://www.we-online.com/catalog/datasheet/177920521.pdf > > You can also sometimes find a similar device on an old 1

Re: [time-nuts] Chinese NTP Time server

Voltage converter might be one of these : https://www.we-online.com/catalog/datasheet/177920521.pdf You can also sometimes find a similar device on an old 10baseT ethernet card, where it generates a -9V supply. On Sun, Dec 22, 2019 at 7:04 PM Brian Lloyd wrote: > > > On 11/26/19 09:28,

Re: [time-nuts] Slightly OT: MSF Clock Mechanism connections

I think that might be a picture from ebay. The 4th photo from this item has a better image of the text : https://www.ebay.co.uk/itm/UK-MSF-Time-Atomic-Radio-Controlled-Silent-Clock-Movement-Mechanism-DIY-Kit/153716231623?hash=item23ca338dc7:g:CAoAAOSwTeJdxS7x On Sun, Dec 22, 2019 at 1:24 PM

Re: [time-nuts] measuring currents on USB powered devices

A problem with inline measurement is that a suitable sense resistance for measuring runtime current (perhaps at a few hundred mA) is not sensitive enough for standby current (uA), and if chosen as a useful value for standby current it drops far too much voltage during full power running. An

Re: [time-nuts] WiFi timings

Thanks, that's interesting. Any idea why the PC->Pi and Pi->PC are so asymmetric ? On Wed, Dec 4, 2019 at 2:43 AM Hal Murray wrote: > I have several systems that have been running/testing ntpd for ages. I'm > a > pack rat. Here is some data from the last year. > > The blue/green dot is

Re: [time-nuts] Lowest Power NTP Server

Does it need to be actual NTP, or could it use a custom broadcast protocol for the 'last yards' ? I'm imagining something that broadcasts a packet subject to the usual anticollision strategies, then in the next packet it reports how far off it actually was (like a GPS sawtooth frame). Some other

Re: [time-nuts] Antique pendulum clocks

On Thu, Nov 21, 2019 at 2:01 AM Bill Beam wrote: > Most people interested in this problem have been dead for about 200 years. > > I knew there was a reason why I didn't feel so well lately .. I have an electric pendulum clock by Bulle. A coil swings in a short arc, following a curved magnetic

Re: [time-nuts] Raspberry Pi TCXO Hat

Also - I'm unsure of the benefit of having a TCXO for the ethernet clock unless it runs so hot that ethernet can't sync using the usual uncompensated crystal. Is there some benefit I'm not seeing ? On Sat, Nov 2, 2019 at 12:35 PM Adrian Godwin wrote: > > > On Sat, Nov 2, 2019 at 11:59

Re: [time-nuts] Raspberry Pi TCXO Hat

On Sat, Nov 2, 2019 at 11:59 AM David J Taylor via time-nuts < time-nuts@lists.febo.com> wrote: > > Given that the path to the outside Ethernet world on both of those models > is > via a USB controller, I would expect to see very little improvement with a > TCXO in a constant temperature

Re: [time-nuts] can of worms: time-of-day in a community radio station

On Sat, Oct 19, 2019 at 4:17 AM Hal Murray wrote: > > The crystal is a thermometer. On modern systems, the temperature depends > on > the workload as well as the air conditioning. > > Off-the-wall thought : could you discipline a well-insulated raspberry pi to NTP using heaters or workload to

Re: [time-nuts] Question for my new GPSDO

Jim mentions the LM34 for sensitivity and LM34 or LM35 for cost compared with the DS1620. But also look at the BME280 : it has digital measurement of temperature with 0.01C resolution (50 times better than the DS1620), costs £5 on digikey but less mounted on a breakout from ebay, and also measures

Re: [time-nuts] DC distribution

I used powerpoles on a project and tried to use a crimping tool I had to hand. Amphenol, I think. It appeared to be the right size but ended up bending the terminal badly where it changes from circular to flat. The results were unreliable and I ended up soldering (though adding sleeving, which

Re: [time-nuts] Lucent KS-24361, aka HP/Symmetricom Z3812A

Dan mentions the sawtooth correction as part of one of the oncore messages, but wasn't sure if the ref-0 used it. You also mention it in the python script. Did you determine whether it was used in the ref-0 ? On Sat, Sep 21, 2019 at 8:31 PM Thomas Petig wrote: > On Tue, Sep 17, 2019 at

Re: [time-nuts] Clock accuracy

There are some ideas for long-lived clock mechanisms here : http://longnow.org/clock/ On Fri, Jul 19, 2019 at 5:00 PM Robert LaJeunesse wrote: > You might want to consider an LED digital wall clock. I have a homebrew > LED clock that's going strong after some 46 years of continuous 24/7/365 >

Re: [time-nuts] E1938A source code/ firmware

I would agree that antiwindup is important when you have integrators. They always seem to cause trouble without it, in applications as diverse as car throttle control and time-domain filtering of respiratory data. I would also recommend, sometimes, the use of feed-forward control to provide an

Re: [time-nuts] 60 Hz frequency and phase measurement

I'd normally use an optocoupler. But it doesn't need to be an 8-pin dip with the mains and low-voltage pins 0.3" apart - it can be a neon lamp and a photodiode, or a photodiode near a mains-fed lamp. Even an incandescent has a very strong modulation of the light. You just need to avoid leds that

Re: [time-nuts] BG7TBL 10 MHz OCXO

On Mon, Jun 3, 2019 at 11:01 PM Andy Backus wrote: > 2. interesting observation: turning the unit 90 degrees onto its right > hand side immediately increases the output frequency by 10 mHz > (reversible); turning the unit 90 degrees onto its left end immediately > decreases the output

Re: [time-nuts] BG7TBL 10 MHz OCXO

There might also be some confusion about which bg7tbl equipment is being discussed. Karl mentioned the GPSDO but from comments Andy has made I think he's evaluating a non-disciplined OCXO, like https://www.ebay.co.uk/itm/132729183455 On Mon, Jun 3, 2019 at 11:29 PM Adrian Godwin wrote

Re: [time-nuts] The Clock That Changed the World (BBC History of the World)

I'd been to Greenwich more than once, but it was Dava Sobell's book, Longitude, that allowed me to understand their importance and seek them out. On Mon, Apr 29, 2019 at 1:00 PM Jim Palfreyman wrote: > Thanks Brooke. > > I remember walking into the Greenwich Museum for the first time, NOT >

Re: [time-nuts] Garmin GPS12XL V3.51

Thanks. So the current estimate of 13 is towards the high end and variation is large enough that 40 years with might be sufficiently low that only 1 rollover is assumed. Not likely to overflow the leap second count early either. On Thu, Apr 11, 2019 at 3:01 PM Tony Finch wrote: > Adrian God

Re: [time-nuts] Garmin GPS12XL V3.51

The references I found in those archived postings explain that the problem was that the GPS receiver had been 'fixed' in 2011 but that the fix only worked until 2015. The solution was to replace the receiver. I wasn't able to find any discussion of why the fix lasted such a short time, but it

Re: [time-nuts] WWVB Disciplined Oscillator

Not personally, but in the UK a company called Quarztlock made both MSF (similar to WWVB) and 198kHz (a frequency-standard broadcast station) that were popular frequency standards in labs. They still exist but have replaced those products with Rubidium and GPS based standards.

Re: [time-nuts] HP Stories: An architectural view of the HP 5060/5061 and awkward oscillator adjustments.

: could you pls give me an > indication where to find a possibly failed tant? > Thank you in advance > Ulli > > > Am 24.02.2019 um 15:07 schrieb Adrian Godwin: > > Just to sneak that back on-topic .. the most recent tant failure I had > was > > in a KS-24361. It was

Re: [time-nuts] reply re Harrison's timing method - #13 in Vol 176, Issue 44 digest

On Wed, Mar 27, 2019 at 2:00 AM jimlux wrote: > > > To get 1 second accuracy, you need 360/86400 = 0.004 degree > measurements. That's 0.073 milliradian - 1 cm at 140 meter distance. > > I'm not sure an "edge" is sharp enough (diffraction, etc.), although > your eye is pretty good at

Re: [time-nuts] multimeter

This is volt-nut territory, isn't it ? If we're into choosing on the basis of essential specialist features, as is fitting for time-nuts, I'm going to recommend the HP970A. It's the only meter I know that can be configured to work upside-down. On Sat, Mar 23, 2019 at 5:08 PM Bob Albert via

Re: [time-nuts] HP Stories: An architectural view of the HP 5060/5061 and awkward oscillator adjustments.

or blowing a fuse. It took out the breaker for the whole ring main. Replacing the tant was the only action necessary for the KS-24361 itself. No other internal damage. On Sun, Feb 24, 2019 at 2:02 PM Adrian Godwin wrote: > I think I've had as many shorted-out tants as dried-out electrolytics. >

Re: [time-nuts] HP Stories: An architectural view of the HP 5060/5061 and awkward oscillator adjustments.

I think I've had as many shorted-out tants as dried-out electrolytics. It's just that they appear in 80s gear instead of 60s. Then there was the flood of high-esr electrolytics from when - early 2000s ? On Sun, Feb 24, 2019 at 1:10 PM Rice, Hugh (IPH Writing Systems) < hugh.r...@hp.com> wrote:

Re: [time-nuts] Clock project request from IEEE

This python package appears to do what you want https://github.com/MrMinimal64/timezonefinder So a small linux distribution on a raspberry pi zero (given that that also has the usual TZ database, if it's not all in the timezonebuilder data) would do the job. Maybe Lady Heather could use that to

Re: [time-nuts] HP Stories: Battery Chargers, and a fading idolization of HP

The schematics are so good - easy to read, lots of context. Even some off-board parts shown so you can see where the signal ends up. Notes about the function and adjustment. You can learn a lot from them. Manuals were worth having. So many of today's schematics are little more than a netlist : a

Re: [time-nuts] OCXO PLL gains?

On Fri, Feb 1, 2019 at 8:09 PM Bob kb8tq wrote: > Gardner: > > https://www.amazon.com/Phaselock-Techniques-Floyd-M-Gardner/dp/0471430633 > > > > is an oldie but goodie in this area. > > The current (3rd) edition of this

Re: [time-nuts] PPS clock module

Or you could go the other way and count it down to a pulse-per-minute, then drive a clock intended for a pulsynetic or similar master clock system. They will mostly be large analog clocks but digital clocks also exist. Still intended for display rather than a panel, but a 19" rack panel would fit.

Re: [time-nuts] Misuse of word "decimate" (was Re: Short term 10MHz source)

Truncate, to me at least, means to shorten : ie to remove some precision by rounding off lower bits. I agree that the source of the word 'decimate' is unclear, but I think, within the field of DSP, it has a reasonably precise definition whether or not that corresponds with wider usage or

Re: [time-nuts] Long life products, obsolete components, and code 4 parts. RE: HP Cesium Standards in the International Atomic Time Scale, the legend of Felix Lazarus, and the "top cover

Time-standard based stories are probably on-topic, but for those wanting a wider range of subjects without posting to the list, http://hpmemoryproject.org/ has good stuff. And, of course, the http://www.hpl.hp.com/hpjournal/journal.html Tek produced a book :

Re: [time-nuts] new WWVB BPSK dev board

I understand why a low-volume shipment of what started as a board costing a few pennies costs $50, but does that simply mean that low-cost parts aren't the right answer for this sort of application ? How would an SDR based on a raspberry pi zero, a suitable ADC and a tuned rx circuit compare ?

Re: [time-nuts] Woman Sets Office Clocks by 100-Year-Old Watch

I see her job is put in jeopardy on the very next page : 'Radio May Set Watches'. On Mon, Nov 19, 2018 at 9:15 PM Brooke Clarke wrote: > Hi: > > Page 63 Popular Science October 1929 "Arnold 345" > >

Re: [time-nuts] GPIB interfaces these days

How important is ATN in a typical time-nuts usage ? I can see it being important in a complex ATE setup where some instruments are automatically providing data to a schedule and need to be serviced, but in my understanding the time-nuts case is often capturing a stream of data from a single TIC.

Re: [time-nuts] Fw: Helium and MEMS oscillators don;t mix well

This one definitely sounds more like the large induced voltages you get when the magnetic fields are ramped. Could be the same with the earlier report but that does have a few more features that are plausibly helium - the recovery of the devices particularly. On Thu, Nov 1, 2018 at 9:10 PM David

[time-nuts] MEMS oscillators

How sensitive to atmospheric environment are MEMs oscillators ? https://www.reddit.com/r/sysadmin/comments/9si6r9/postmortem_mri_disables_every_ios_device_in/ It gets closer to time-nuts territory in the earlier discussion - see captaincool's contribution some way down :

Re: [time-nuts] Still looking for a schematic drawing for Oscilloquartz 8600-3 (945.860.011.03 S/N 422)

Those are excellent images. Just needs a shot of the track side of the larger board. On Thu, Oct 25, 2018 at 8:38 PM Azelio Boriani wrote: > Images of the 8600 can be found here: > > A paper on the 8607 BVA with the oven schematic is here: >

Re: [time-nuts] Programmable clock for BFO use....noise

Depending on the cost of those mems devices, a microcontroller can be so trivial that you can just consider it as a smart eprom. Like Tom's PICDIV dividers, which act more like perfect-for-pupose division chip than a micro. On Sat, Sep 15, 2018 at 4:31 AM, Forrest Christian (List Account) <

Re: [time-nuts] WWVB Translation/Simulation from GPS Data

Could you couple the 60kHz signal into the power line ? It should conveniently pass around most of the house and some ferrite rings on the incoming mains minimise what goes outside your premises. On Wed, Sep 5, 2018 at 5:38 PM, Andy Backus wrote: > I have taken a similar approach to Wayne's. >

Re: [time-nuts] Petition to Maintain WWV, WWVH, WWVB

There seem to be 2 : https://petitions.whitehouse.gov/petition/proposed-shutdown-nists-wwv-and-wwvh-radio-stations On Fri, Aug 24, 2018 at 8:44 PM, Dana Whitlow wrote: > Is there more of it? What I see makes no reference to WWVB. > > Dana > > > On Fri, Aug 24, 2018 at 1:10 PM Graham / KE9H >

Re: [time-nuts] History Channel "In Search of" Time Travel

In the UK, www.history.com forcibly redirects to www.history.co.uk On Sun, Aug 19, 2018 at 1:44 PM, Didier Juges wrote: > That would be very nice since I missed it. > Thanks in advance, > Didier KO4BB > > On Sat, Aug 18, 2018, 2:24 PM Dan Rae wrote: > > > If anyone wants to see this I could

Re: [time-nuts] Affordable PoE 6-digit time displays?

Takes advantage of the isolated, balanced-mode twisted-pair ethernet wiring standard to send power - like phantom power to a professional microphone. On Mon, Jun 18, 2018 at 5:36 PM, Bob Bownes wrote: > Power over Ethernet. 48V shipped down the ethernet wires. Generally used to > power IP

Re: [time-nuts] KS-24361 Lady Heather problem

I was running two for a while, then needed the FTDI converters for something else. I've just reinstated one with a CH340 converter, will see if it has any problems. I'm currently connected to a ref-0, which is itself connected to another ref-0 modified so it functions as a ref-1. I've used