Re: [time-nuts] GPS? Antenna

2016-09-09 Thread Glenn Little WB4UIV
Thanks for all of the help. I contacted Huber Suhner and now have the data sheet and radiation patterns for this antenna. 73 Glenn WB4UIV On 9/6/2016 4:25 AM, Szeker K. wrote: Yes its H-S model, and it must be a GPS antenna...

Re: [time-nuts] Z3801A gps week rollover

2016-09-09 Thread Art Sepin
Timing product manufacturers used a variety of OEM GPS timing receivers over the years including the Motorola Oncore series. The 1024 Week-Roll-Over dates for Oncore receivers, computed from the firmware version compile date, are listed here:

Re: [time-nuts] Batteries [WAS: Z3801A gps week rollover]

2016-09-09 Thread Charles Steinmetz
Mark wrote: You might want to try some lithium AA cells. They start out around 1.65V. They are MUCH less prone to leakage than any "alkaleak" battery and have a very long shelf-life (i.e. good for low drain memory backups). Not only that, they have considerably greater energy density and a

[time-nuts] Z3801A gps week rollover

2016-09-09 Thread Mark Sims
You might want to try some lithium AA cells. They start out around 1.65V. They are MUCH less prone to leakage than any "alkaleak" battery and have a very long shelf-life (i.e. good for low drain memory backups). As always, when adding a backup battery to a GPS, verify that the battery

Re: [time-nuts] Z3801A gps week rollover

2016-09-09 Thread paul swed
The gps rcvr does not have a batter but will indeed support an external battery. I attached 2 AA batteries in a external easily replaceable holder and ran the 2 wires to the receiver 10 pin plug. (At least I think it was 10) I change the batteries every 2 years not so much for voltage as concern

Re: [time-nuts] Z3801A gps week rollover

2016-09-09 Thread Hal Murray
kb...@n1k.org said: > The bigger problem for NTP is when the leap second correction process is > thrown off by the “time warp”. When leap seconds get fixed in mid-August > rather than the end of June … not a good thing. Is that still a problem? If so, do you have any details. I don't

Re: [time-nuts] Z3801A gps week rollover

2016-09-09 Thread Magnus Danielson
On 09/09/2016 01:17 PM, Bob Camp wrote: Hi On Sep 9, 2016, at 3:06 AM, Magnus Danielson wrote: Hi, On 09/08/2016 11:53 PM, Hal Murray wrote: petervince1...@gmail.com said: Can I just ask why the Z3801As are having week roll-over problems now - I didn't

Re: [time-nuts] Z3801A gps week rollover

2016-09-09 Thread Bob Camp
Hi > On Sep 9, 2016, at 3:06 AM, Magnus Danielson > wrote: > > Hi, > > On 09/08/2016 11:53 PM, Hal Murray wrote: >> >> petervince1...@gmail.com said: >>> Can I just ask why the Z3801As are having week roll-over problems now - I >>> didn't think it was 2048 weeks

Re: [time-nuts] Z3801A gps week rollover

2016-09-09 Thread Magnus Danielson
Hi, On 09/08/2016 11:53 PM, Hal Murray wrote: petervince1...@gmail.com said: Can I just ask why the Z3801As are having week roll-over problems now - I didn't think it was 2048 weeks since GPS "zero-hour" until late on the 6th of April 2019? It's probably 1024 weeks since a date was built