Re: [time-nuts] time.gov

Since the application takes into account the network speed, maybe there is a cacheing issue initially that is then corrected when you refresh the page? It’s no longer doing it now but was for several hours earlier today. Strange. ___ time-nuts

[time-nuts] TruePosition GPSDO performance

Ok, I dusted the TruePosition OCXO with some freeze spray. Not pretty picture attached... it took around 6 minutes to stabilize. I used just enough spray to lightly frost the can. It would probably help to shield the board from drafts, but probably not wrap it in a polar parka. It did

Re: [time-nuts] time.gov

Just tried it, came up 4 sec. slow. Refreshed the page and it was correct. David N1HAC On 5/11/17 7:52 PM, Jerry Hancock wrote: I checked it on two different computers and again just now, all were counting 5+ seconds slow. I then downloaded their flash app which as an option I never had

[time-nuts] A good GPS-Receiver with 1PPS output...

https://www.tindie.com/products/nsayer/skytraq-venus838lpx-t-timing-gps-module-breakout/ - > Can't find this on Tindie??? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] TruePosition GPS Receiver firmware

Has anyone figured out what the two small push buttons do? - Original Message - From: "Ben Hall" To: Sent: Monday, May 08, 2017 7:30 PM Subject: Re: [time-nuts] TruePosition GPS Receiver firmware On 5/8/2017 4:45 PM, Mark Sims wrote: Anyway,

Re: [time-nuts] A good GPS-Receiver with 1PPS output...

https://www.tindie.com/products/nsayer/skytraq-venus838lpx-t-timing-gps-module-breakout/ > On May 11, 2017, at 5:36 PM, djl wrote: > > Can't find this on Tindie??? > > On 2017-05-10

[time-nuts] HP10811 Oscillator Thermal Fuse

https://www.febo.com/pipermail/time-nuts/2017-May/date.html While I find traces of your article quoted, it seems to have vanished. It lead me to this interesting article of 16 pages on electronic fires by a fire investigator. There is a lot here for designers when it comes to preventing fires

Re: [time-nuts] A good GPS-Receiver with 1PPS output...

Can't find this on Tindie??? On 2017-05-10 09:03, Mark Sims wrote: The GPS with the lowest PPS jitter/sawtooth is the Venus timing receiver... around 6 ns. Nick Sayer sells one on Tindie for $50. It is mounted on a board that has the same pinouts as the Adafruit Ultimate GPS. Also Navspark

Re: [time-nuts] Fwd: HP10811 Oscillator Thermal Fuse

I had a vaguely similar situation with a pressure switch for the pump in my home's water supply. The electrical contacts in the pressure switch have to handle about 10 Amps at 250 Volts (our line voltage is on the high side). Over the years, the contacts burn and become "ohmic" contacts, gradually

[time-nuts] Fwd: time.gov

Be sure to post your result. Five years ago I regularly checked my Casio LED watch which was holding 0.3 seconds per week. It always worked properly. Perhaps we should report this to Trump so he can fire the head of NIST. -- Forwarded message -- From: Jerry Hancock

Re: [time-nuts] time.gov

I checked it on two different computers and again just now, all were counting 5+ seconds slow. I then downloaded their flash app which as an option I never had to do and that was correct. Both of the apps claim to be adjusted for network delay. This was around 14:00Pacific. I just checked

Re: [time-nuts] HP10811 Oscillator Thermal Fuse

Hi The ones that people decided are dead quite literally went into the trash can long long ago. They never made it into the eBay era. The warranty on the gear was short enough that nobody thought to send them back. The days of “tear into it and fix it” at the component level were over *long*

[time-nuts] HP10811 Oscillator Thermal Fuse

https://www.febo.com/pipermail/time-nuts/2017-May/date.html These oscillators sold for $800 in 1985 or so. They are on eBay all working for $250 or more. Where are all the ones with blown thermal fuses for $25? I want to buy. It would be interesting to have the HP warranty data for nuisance

Re: [time-nuts] Fwd: HP10811 Oscillator Thermal Fuse

There's an excellent article out there on the web called "Low Voltage, the incompetent ignition source" I highly recommend a read. I dealt with a case like this a couple years ago. Failed fet in an H bridge caused a fault which the brick SMPS picked up as a short, and went into "hiccup" mode

Re: [time-nuts] HP10811 Oscillator Thermal Fuse

Hi A bit in jest:… that compares to 3,957 incidences of open fuses that had nothing to do with a thermal runaway. Of those, the majority 3,721 resulted in the 10811 being tossed in the garbage as “another junker”……(yes, those are estimates, but I’d bet they are close based on the number of

Re: [time-nuts] Fwd: HP10811 Oscillator Thermal Fuse

https://www.febo.com/pipermail/time-nuts/2017-May/date.html This is the third report of an open thermistor which would have resulted in a fire in an HP10811 oven. There are a dozen other problems that could cause such a fire. See http://gonascent.com/papers/hp/hp10811/thermal.jpg . The leads

Re: [time-nuts] E1938 info regarding LEDs, push button switch and EFC voltage notation

You can find schematics and various info here: On Thu, May 11, 2017 at 3:47 PM, James Robbins wrote: > 1. I have just acquired an E1938 and

[time-nuts] time.gov

https://www.febo.com/pipermail/time-nuts/2017-May/date.html About 10 years ago, I checked my WWVB time code receiver that I built against time.gov and it was within 0.1 seconds. That was as close as the eyeball can tell. You report a huge error and if confirmed, you should complain. I would

[time-nuts] time.gov

I went to time.gov today as I was sitting away from my lab when a new watch arrived. Finally got the 25yr watch from the company that laid me off a week later… Anyway, I set the seconds rollover to 00 when time.gov reset and then walked down to my lab and noticed the watch is now 6 seconds

Re: [time-nuts] TruePosition GPSDO performance

Hi The small OCXO in the TruePosition probably will do better with a beach towel tossed over the unit. It’s going to be pretty sensitive to drafts ….There are teardown pictures in the archives of the OCXO. Not much insulation in one of them at all. Bob > On May 11, 2017, at 4:06 PM, Mark

[time-nuts] TruePosition GPSDO performance

I ran a test of the TruePosition 1PPS signal performance using a TAPR TICC. The TICC was clocked by a HP-5071A. The TICC was in time interval mode with the Zyfer 1PPS on channel A and the 5071A 1PPS on channel B. The TruePosition had been powered up for a couple of days. Values below tau

Re: [time-nuts] Anthorn eLoran

Dave that may have been me. Yes there is other timing data on the signal. Thats what helps the receiver do a better job of understanding frequency and time. The old austrons and such do not process the bits. But if I had to guess its easy enough to actually get them out to experiment with. Regards

Re: [time-nuts] HP10811 Oscillator Thermal Fuse

On 5/11/2017 4:25 AM, Bob kb8tq wrote: Ultimately it all came to no good. The energy conservation rules simply took over. Shutting down everything during off hours became the way a lot of outfits did things. Don’t turn off all A couple of comments on this, probably no surprise to many time

Re: [time-nuts] TAPR GPS Kits

Larry, No missed emails on your part. I'm waiting on confirmation of the shipment with final shipping cost before I calculate a firm price. Hope to have confirmation today or tomorrow latest. Steve > On May 11, 2017, at 11:33 AM, Larry McDavid wrote: > > Steve, did I

Re: [time-nuts] TAPR GPS Kits

Steve, did I miss an email confirming the price of these plates? Did you get a confirmation of your order of the plates? I have not paid you yet so please tell me if I missed your email that would trigger my payment. Larry On 5/5/2017 10:44 AM, Steve - Home wrote: All, I've logged all

[time-nuts] Surplus Lucent RFTG-m-II units in rack shelf (eBay)

I noticed this surplus Lucent item on eBay, auction # 132186030112 by a01mhowa , based in South Carolina. KS-24019 L108 / L109 rack unit appears to be commercial CDMA site pulls with interconnection cables. Seller states he has more than 10 units. greg, w9gb Sent from iPad Air

Re: [time-nuts] HP10811 Oscillator Thermal Fuse

Hi > On May 11, 2017, at 11:22 AM, Bill Hawkins wrote: > > Labs could have used a common gas heater for the crystal ovens, with a > bit of rewiring. > > No fire hazard there - you've got a chimney. Also, flame safety is well > developed for gas heaters. > > Would have

Re: [time-nuts] HP10811 Oscillator Thermal Fuse

Labs could have used a common gas heater for the crystal ovens, with a bit of rewiring. No fire hazard there - you've got a chimney. Also, flame safety is well developed for gas heaters. Would have required throttling gas flow control. Bill Hawkins Another possibility is circulating hot water.

Re: [time-nuts] Fwd: HP10811 Oscillator Thermal Fuse

Having  had a fan failure on a well insulated Rb we use a temperature sensor also used for compensation in to a PIC to shut down the systemBert Kehren Sent from my Galaxy Tab® A Original message From: "David G. McGaw" Date: 5/10/17 11:20 PM

Re: [time-nuts] Anthorn eLoran

Didn’t someone say a while back, that there appeared to be "other data" present on the transmission, but didn't know what it was, or used for... Or did I imagine it.? Maybe that's why they keep it going? 73. Dave G0WBX. On 11/05/17 05:15, time-nuts-requ...@febo.com wrote: > Message: 5 >

Re: [time-nuts] Counter Internal Oscillator Importance with ExternalReference?

Hi, >Like most counters, the 53230A has an ext-ref input. But it is horrible. And the ref output is even worse. I had similar issues using the internal ref. output of the Agilent 53230A (with OCXO option installed) connected to the Ext. ref input of the 33220A. The frequency synthtized by the

Re: [time-nuts] Fwd: HP10811 Oscillator Thermal Fuse

I too have had a fuse open up due to a failed thermistor in a HP10811. David N1HAC On 5/10/17 7:43 PM, Dan Rae wrote: As I reported the last time this subject came up, or maybe the time before, the only time I had an open thermal fuse was in a 10811 that had an open thermistor. I was able

[time-nuts] E1938 info regarding LEDs, push button switch and EFC voltage notation

1. I have just acquired an E1938 and powered it up. It seems to work. I see that it has 4 blinking board LEDs (green, red, yellow, yellow) and a pushbutton switch at the end of the board opposite to the DB25 connector. Can anyone point me to either the schematic for the board or what these

Re: [time-nuts] HP10811 Oscillator Thermal Fuse

Hi Ok, well since I was *asked* to say more :) Long ago heavy users of this sort of gear figured out that you wanted to keep the OCXO’s on all the time. That was the way to make the gear the most stable. That is the way you can use your counter / generator / whatever when you get to work in

Re: [time-nuts] Anyone using UBLOX LEA-M8F for GPSDO?

Neil we  have used M7 and I have boards contact me off list toBert Kehren  Sent from my Galaxy Tab® A Original message From: Neil Smith G4DBN Date: 5/10/17 4:03 PM (GMT-05:00) To: Discussion of precise time and frequency measurement

Re: [time-nuts] Fwd: HP10811 Oscillator Thermal Fuse

kb...@n1k.org said: > The is related to safety (full time power on). As it worked out, the fuse > did not help them in that respect. The Fed’s still ruled the gear had to be > shut off at night. Could you please say more... Does that mean unplugging gear with always-on OCXOs? Or dumping