[time-nuts] Zyfer Nanosync-380 GPSDO performance

I ran a test of the Zyfer Nanosync-380 GPSDO 1PPS signal performance using a TAPR TICC. The TICC was clocked by a HP-5370A. The TICC was in time interval mode with the Zyfer 1PPS on channel A and the 5071A 1PPS on channel B. These numbers are sort of a worst case. The Nanosync had been

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

https://www.febo.com/pipermail/time-nuts/2017-May/date.html In order to have a runaway trophy, the thermal fuse would have to have been jumpered and then an oven control failure would have to have occurred. The rated temperature of 125° C is well above operating temperature of 82°C. The thermal

Re: [time-nuts] current status of eLORAN globally

You have it pretty much. Regards Paul On Wed, May 10, 2017 at 8:43 PM, Ruslan Nabioullin wrote: > Hi, what's the current status of eLORAN globally? It's difficult to > find the latest information on this on the WWW. As I understand it, > there currently exist only two

Re: [time-nuts] Anthorn eLoran

The European segment of the KiwiSDR network has a number of SDRs with good 100 kHz reception. There is even a crude Loran-C display of sorts (use the “extensions” menu). http://sdr.hu/?q=kiwiSDR A good example, Haparanda, Sweden: http://sm2byc.ddns.net:8073/?ext=loran The great

[time-nuts] current status of eLORAN globally

Hi, what's the current status of eLORAN globally? It's difficult to find the latest information on this on the WWW. As I understand it, there currently exist only two active eLORAN projects, Ursanav/US gov't in the US, and Babcock Comms/UK gov't in the UK (and possibly South Korea as well?). I

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

The view from inside HP when I worked with the people who designed and built the 10811 some 35-40 years ago was that: 1. 10811 ovens rarely fail. 2. When they do fail, it is rarely because the oven runs away. I know I have never encountered a runaway. No one at HP had a "trophy" on their

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

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 to replace that and get the OCXO working, but if the fuse had been replaced with a wire link I'm sure the entire oven

Re: [time-nuts] Anthorn eLoran

Hi Alan, I get the impression there is a new project under development to make it a commercial operation - see: http://www.taviga.com/ Peter ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

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

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 sells one for more $. Lady Heather talks to the Venus

Re: [time-nuts] Anthorn eLoran

Its been quite the interesting read. I agree with the behavior of an antenna issue. They should just use a larger penny. That tends to work for a bit of time. I suspect the reason to keep it going though is to test eloran's time dissemination. The other sites are not needed for this purpose. In

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

Hi Unless you believe that HP’s quality was poor, the experience of the rest of the OCXO business is likely relevant. In `~50 years of designing OCXO’s the only one I have ever seen are the HP units. Nobody else does that. Based on return rates, the number of “runaway ovens” is negligible

[time-nuts] Fwd: HP10811 Oscillator Thermal Fuse

https://www.febo.com/pipermail/time-nuts/2017-May/date.html The poster at http://www.simonsdialogs.com/2016/09/a-thermal-fuse-and-hp-10811-60111-repair/ reported that the thermal fuse saved an oscillator from destruction when a thermistor opened. HP made thousands of these which sold for $800.

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

I’ve just ordered an LEA-M8F board from CSG to save time and trouble making a PCB. I am intending to use it to discipline one of my 100MHz OCXOs, using a /5 divider. Has anyone on the list used this chip to discipline an external OCXO? Any experiences to share and suggestions to get best

Re: [time-nuts] Anthorn eLoran

Hi Peter Ah that sounds more like it. Aerial maintenaance shuts down the whole site these dats including MSF. There is really no reason for them to keep it running but I think Trinity House are paying the bill. It cannot be used for nav without Lessay and the output from Sylt, So I muse that

Re: [time-nuts] Sorry for the unedited post: Counter Internal Oscillator Importance with ExternalReference?

Hi Thomas, On 05/10/2017 07:12 PM, Tom Knox wrote: Hi All; I used my speech recognition software last night and reading my post this morning I was embarrassed. Hopefully this email will make sense. Thanks everyone for their input. Tom, i have a question; was there any difference between the

[time-nuts] Sorry for the unedited post: Counter Internal Oscillator Importance with ExternalReference?

Hi All; I used my speech recognition software last night and reading my post this morning I was embarrassed. Hopefully this email will make sense. Thanks everyone for their input. Tom, i have a question; was there any difference between the two 53230A oscillators when locked to an external

[time-nuts] Any time-nuts in New York want to do dinner tonight?

Fellow time-nuts, I seem to have a spare evening here in New York. Anyone interested to meet up for dinner this evening? I have my hotel near Times Square and can walk a bit, but I prefer to stay on Manhattan. Contact me off-list if you are interested. Cheers, Magnus

Re: [time-nuts] Anthorn eLoran

I gather there is an intermittent fault that is taking out a fuse, which they are, necessarily, working hard to rectify. Peter On 10 May 2017 at 10:58, Iain Young wrote: > On 09/05/17 20:28, moGandalfG8--- via time-nuts wrote: > >> Iain Young wrote: >> I now have all four with

[time-nuts] TruePosition GPS Receiver

Some of the pins could be the Furuno GPS receiver data stream and not the GPSDO data stream. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions

Re: [time-nuts] Anthorn eLoran

Subject: Re: [time-nuts] Anthorn eLoran Is there software available to receive these signals using an SDR device such as the RSP-1 or 2, AirSpy with SpyVerter, or whatever? I don't have a dedicated receiver but it might be fun to see something, being not very far away from Anthorn. Thanks,

Re: [time-nuts] Anthorn eLoran

Yes, noticed here it was off again and am pretty sure you're right about maintenance, just don't remember them starting at 0700 in the past:-) Nigel, GM8PZR In a message dated 10/05/2017 10:58:31 GMT Summer Time, i...@g7iii.net writes: On 09/05/17 20:28, moGandalfG8--- via time-nuts

Re: [time-nuts] First batch data of China pulstar observation satellite

Hi The readme.txt inside http://www.beidou.gov.cn/xpnavdata.rar 1. filename rules event: Psrname_mmdd_hhmmss.txt (psrname: pulsar name, yyymmmddd_hhmmss: utc date of the data) orbit: orbit_mmdd_hhmmss.txt (utc date of orbit data) 2. orbit file format time(seconds start from 2008-01-01

Re: [time-nuts] Anthorn eLoran

On 09/05/17 20:28, moGandalfG8--- via time-nuts wrote: Iain Young wrote: I now have all four with green tracking lights, so looks good to go Thanks Iain, Also looking good here now so seems like I cried wolf after all, although very happy it wasn't anything more permanent:-) I noted this

Re: [time-nuts] Looking for a HP-58503 display

I am 99% sure you are correct, it is the same display as the 53131/2A counter. Sadly although in the past I have found and been able to order raw similar displays for product such as the 3458A, after a prolonged search I was never able to find a part number or order the 58503/53132 displays.

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

Hi For the same money, you could get one of these: http://www.ebay.com/itm/152340314423?_trksid=p2057872.m2749.l2649=STRK%3AMEBIDX%3AIT Then locking up another oscillator is just a simple phase locked loop.

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

On Tue, May 9, 2017, at 09:52 PM, Ulf Kylenfall via time-nuts wrote: > > Gentlemen. > I am sure this has been asked before... > I am looking to purchase a GPS receiver modulethat supplies a good/stable > 1PPS outputwith as little (internally) generated jitter as possible. How much jitter is

[time-nuts] Administrivia: febo.com SSL certificate

If your browser has been throwing security warnings or errors when you try to access the web server at febo.com (for example, the list archives), that problem should now be fixed. I was using an SSL certificate issued by StartSSL, a company that has sort of shot themselves in the foot due to

Re: [time-nuts] Looking for a HP-58503 display

I was looking at the 34401A service manual. It shows the VFD pinouts. Looks like 18 pins topside and 16 pins bottom side and is a 14 seg display. I also looked at the 53132A manual. The 53131/53132/53181 counters use a 14 seg display with 18 pins top and bottom. The 58503B is 14 seg with

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

How about ebay item 251785217093 ? On 09/05/2017 20:52, Ulf Kylenfall via time-nuts wrote: > > Gentlemen. > I am sure this has been asked before... > I am looking to purchase a GPS receiver modulethat supplies a good/stable > 1PPS outputwith as little (internally) generated jitter as

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

Gentlemen. I am sure this has been asked before... I am looking to purchase a GPS receiver modulethat supplies a good/stable 1PPS outputwith as little (internally) generated jitter as possible. PCB-style is OK. It is to be usedfor GPS-locking a HP 105B in aseparate box. Miniaturization not

[time-nuts] Looking for a HP-58503 display

It's the exact same display module as in the 53131A/53132A. It's a Samsung INB-12MM53T, Keysight part number 5040-0023. The VFD part itself is an Itron CC1187G. I've also found a possible part number for the VFD as an Itron CP3033A (although that might be the VFD for the 34401A, which would