[time-nuts] Re: Lady Heather clock question
Bill, that does sound a bit strange, for me it looks like the program does not work correct at all. When I change this way between GPS time and UTC LH does immediately switch the time these 18 secs and does continue working without a resetting comment. Did you install this version 6 (the last is v. 6.14 beta) as described? You have to have installed v 5 before and then to follow the instruction for the beta version to install on top. John, KE5FX, does provide this released v. 5 on his homepage. The readme for the settings is in general still valid. See http://www.ke5fx.com/heather/readme.htm I think in your case it will perhaps be a good idea to restart the full installation with v.5 and then proceeding as in the instruction to switch to the beta version. Mark Sims wrote:'This is just the .exe To use it you will need to have v5.0 installed and working (from ke5fx.com) and replace the v5.0 heather.exe file with this one (backup your old .exe first).' That should then work properly. I am running Win 10 pro 64 w/o any hazzle with LH 6.14. Good luck! 73 Arnold, DK2WT Am 29.07.2021 um 03:30 schrieb B Riches via time-nuts: Hi Arnold, I Tried that - hit t then u - clock program said resetting and will take a bid. Still did not work. Any other ideas? 73, Bill On Wednesday, July 28, 2021, 07:23:28 PM EDT, Arnold Tibus wrote: Bill, it is quite easy: When running LH type 'T', you will then see the list 'Reference' then hit 'U' for UTC-time. This should resolve the problem. I had the same effect before confusing on top left side is showing 'UTC ofs: 18' but this is only the information for the difference GPS/ UTC time I understand. But LH was still running with GPS-time setting. Hope this will help you. kind regards Arnold, DK2WT Am 29.07.2021 um 00:04 schrieb B Riches via time-nuts: How can a make my LH V6.1 clock show time equal to UTC time? It is 18 seconds fast = to 18 second offset. Set up: Windoze 10 simple con fig file = /3 /rx /tz=-4edst KS24361 - REF0 GPS UTC time in greenDate, Week, TOW in yellowDate 28 Jul 2021 ro Week 2160UTC ofs:18 in white When programming is running and I enter rxx/17 clock = UTC time but receiver has shut down. What am I doing wrong? Thanks for any help. 73, Bill, WA2DVUCape May, NJ ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Lady Heather clock question
Hi Arnold, I Tried that - hit t then u - clock program said resetting and will take a bid. Still did not work. Any other ideas? 73, Bill On Wednesday, July 28, 2021, 07:23:28 PM EDT, Arnold Tibus wrote: Bill, it is quite easy: When running LH type 'T', you will then see the list 'Reference' then hit 'U' for UTC-time. This should resolve the problem. I had the same effect before confusing on top left side is showing 'UTC ofs: 18' but this is only the information for the difference GPS/ UTC time I understand. But LH was still running with GPS-time setting. Hope this will help you. kind regards Arnold, DK2WT Am 29.07.2021 um 00:04 schrieb B Riches via time-nuts: > How can a make my LH V6.1 clock show time equal to UTC time? It is 18 > seconds fast = to 18 second offset. > Set up: > Windoze 10 > simple con fig file = /3 /rx /tz=-4edst > KS24361 - REF0 GPS > UTC time in greenDate, Week, TOW in yellowDate 28 Jul 2021 ro Week 2160UTC > ofs:18 in white > When programming is running and I enter rxx/17 clock = UTC time but receiver > has shut down. > What am I doing wrong? > Thanks for any help. > 73, > Bill, WA2DVUCape May, NJ > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. > ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Lady Heather clock question
Bill, it is quite easy: When running LH type 'T', you will then see the list 'Reference' then hit 'U' for UTC-time. This should resolve the problem. I had the same effect before confusing on top left side is showing 'UTC ofs: 18' but this is only the information for the difference GPS/ UTC time I understand. But LH was still running with GPS-time setting. Hope this will help you. kind regards Arnold, DK2WT Am 29.07.2021 um 00:04 schrieb B Riches via time-nuts: How can a make my LH V6.1 clock show time equal to UTC time? It is 18 seconds fast = to 18 second offset. Set up: Windoze 10 simple con fig file = /3 /rx /tz=-4edst KS24361 - REF0 GPS UTC time in greenDate, Week, TOW in yellowDate 28 Jul 2021 ro Week 2160UTC ofs:18 in white When programming is running and I enter rxx/17 clock = UTC time but receiver has shut down. What am I doing wrong? Thanks for any help. 73, Bill, WA2DVUCape May, NJ ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Lady Heather clock question
Hi 18 seconds fast sounds a lot like being set to GPS time vs UTC …… Bob > On Jul 28, 2021, at 6:04 PM, B Riches via time-nuts > wrote: > > How can a make my LH V6.1 clock show time equal to UTC time? It is 18 > seconds fast = to 18 second offset. > Set up: > Windoze 10 > simple con fig file = /3 /rx /tz=-4edst > KS24361 - REF0 GPS > UTC time in greenDate, Week, TOW in yellowDate 28 Jul 2021 ro Week 2160UTC > ofs:18 in white > When programming is running and I enter rxx/17 clock = UTC time but receiver > has shut down. > What am I doing wrong? > Thanks for any help. > 73, > Bill, WA2DVUCape May, NJ > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Lady Heather clock question
How can a make my LH V6.1 clock show time equal to UTC time? It is 18 seconds fast = to 18 second offset. Set up: Windoze 10 simple con fig file = /3 /rx /tz=-4edst KS24361 - REF0 GPS UTC time in greenDate, Week, TOW in yellowDate 28 Jul 2021 ro Week 2160UTC ofs:18 in white When programming is running and I enter rxx/17 clock = UTC time but receiver has shut down. What am I doing wrong? Thanks for any help. 73, Bill, WA2DVUCape May, NJ ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Trimble GSPDO - ISSUE
I'm not worried about the F connector itself- rather, it's irresistible temptation to use wrong-impedance cables, often rather long ones. Agreed that LNA inputs don't tend to make good matches, but that's what the splitter largely addresses. It's the wrong impedance of the source that foils the benefit of the splitter, and which most people ignore altogether. I think we'd get along better if the antenna output impedance were 75 ohms, F connectors were used, and 75 ohm splitters were used. Then good isolation would be preserved at low cost no matter what load impedances were present on the splitter's outputs. The simple mismatch loss between 50 ohms and 75 ohms is pretty negligible in this context. When I see an attenuator with only about 15 dB return loss at L-band, it goes straight into the trash. To me, the anticipated main benefit of having a nanoVNA is that I'll be able to identify such defective items at flea markets before spending money on it. That is, if there are ever any more flea markets (because of Covid). I'm not optimistic. Dana On Wed, Jul 28, 2021 at 7:58 AM Bob kb8tq wrote: > Hi > > If you measure the input impedance of most low noise receivers, it’s not > going to be 50 ohms pure resistive. There are multiple reasons for this. > Since the “load” is not a match to either 50 or 75 ohm cable, it’s not that > big a deal. > > The amp in the antenna with it’s post filtering may or may not present a > 50 ohm source. They rarely hit a 14 db return loss spec in any case. Indeed > there are a lot of attenuators out there that don’t get to 14 db at 1.5 > GHz. > > Trimble did a *lot* of testing before they put the F connector on the > TBolt. > They could find no impact at all. > > Bob > > > On Jul 28, 2021, at 8:23 AM, Dana Whitlow wrote: > > > > Most general purpose passive splitters for the L-band regime are > > essentially variations > > on the Watkinson splitter, which provides good isolation between the > output > > ports, if > > (and only if) the input port is driven from a matched source. > > > > So if your GPS antenna, whether active or passive, has a good output > match > > then > > the Samsung's input impedance will not affect operation of the Trimble. > > But, again, > > this is true only if the antenna's output impedance is matched to the > > splitter's > > characteristic impedance (including consideration of any impedance > > transformation > > in the transmission line between the antenna and the splitter). > > > > I cringe at the cavalier treatment given to line impedances used in GPS > > systems. > > AFAIK, all GPS equipment is designed for 50 ohms, yet a great deal of > such > > equipment is provided with 'F' connectors, which invite the use of > > inexpensive RG-6 > > line, which is 75 ohm cable. In addition to problems with impedances and > > loading, > > It's a built-in source of multipath, all at no extra charge! > > > > Dana K8YUM > > > > > > On Tue, Jul 27, 2021 at 3:01 PM Don Cross wrote: > > > >> On Tue, Jul 27, 2021 at 2:54 PM ordnit via time-nuts < > >> time-nuts@lists.febo.com> wrote: > >> > >>> > >>> Any guess? Do I have to throw the unit from the window? For your > >>> reference, I have a samsung unit connected to same antenna via a > >>> splitter. The GPSDO is performing very well. > >>> > >>> > >> Hi Ordnit, > >> > >> I'm hardly an expert, but I wonder about the splitter. Is this a > passive or > >> active splitter? If passive, it could be the input impedance of your > >> Samsung is much lower than for your new Trimble and it is making the > signal > >> seen by the Trimble too weak. If you are willing to disconnect the > Samsung > >> temporarily, perhaps you could try connecting your antenna to the > Trimble > >> only and see what happens. > >> > >> Don > >> ___ > >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send > >> an email to time-nuts-le...@lists.febo.com > >> To unsubscribe, go to and follow the instructions there. > >> > > ___ > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-le...@lists.febo.com > > To unsubscribe, go to and follow the instructions there. > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Trimble GSPDO - ISSUE
Hi If you measure the input impedance of most low noise receivers, it’s not going to be 50 ohms pure resistive. There are multiple reasons for this. Since the “load” is not a match to either 50 or 75 ohm cable, it’s not that big a deal. The amp in the antenna with it’s post filtering may or may not present a 50 ohm source. They rarely hit a 14 db return loss spec in any case. Indeed there are a lot of attenuators out there that don’t get to 14 db at 1.5 GHz. Trimble did a *lot* of testing before they put the F connector on the TBolt. They could find no impact at all. Bob > On Jul 28, 2021, at 8:23 AM, Dana Whitlow wrote: > > Most general purpose passive splitters for the L-band regime are > essentially variations > on the Watkinson splitter, which provides good isolation between the output > ports, if > (and only if) the input port is driven from a matched source. > > So if your GPS antenna, whether active or passive, has a good output match > then > the Samsung's input impedance will not affect operation of the Trimble. > But, again, > this is true only if the antenna's output impedance is matched to the > splitter's > characteristic impedance (including consideration of any impedance > transformation > in the transmission line between the antenna and the splitter). > > I cringe at the cavalier treatment given to line impedances used in GPS > systems. > AFAIK, all GPS equipment is designed for 50 ohms, yet a great deal of such > equipment is provided with 'F' connectors, which invite the use of > inexpensive RG-6 > line, which is 75 ohm cable. In addition to problems with impedances and > loading, > It's a built-in source of multipath, all at no extra charge! > > Dana K8YUM > > > On Tue, Jul 27, 2021 at 3:01 PM Don Cross wrote: > >> On Tue, Jul 27, 2021 at 2:54 PM ordnit via time-nuts < >> time-nuts@lists.febo.com> wrote: >> >>> >>> Any guess? Do I have to throw the unit from the window? For your >>> reference, I have a samsung unit connected to same antenna via a >>> splitter. The GPSDO is performing very well. >>> >>> >> Hi Ordnit, >> >> I'm hardly an expert, but I wonder about the splitter. Is this a passive or >> active splitter? If passive, it could be the input impedance of your >> Samsung is much lower than for your new Trimble and it is making the signal >> seen by the Trimble too weak. If you are willing to disconnect the Samsung >> temporarily, perhaps you could try connecting your antenna to the Trimble >> only and see what happens. >> >> Don >> ___ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send >> an email to time-nuts-le...@lists.febo.com >> To unsubscribe, go to and follow the instructions there. >> > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Trimble GSPDO - ISSUE
Most general purpose passive splitters for the L-band regime are essentially variations on the Watkinson splitter, which provides good isolation between the output ports, if (and only if) the input port is driven from a matched source. So if your GPS antenna, whether active or passive, has a good output match then the Samsung's input impedance will not affect operation of the Trimble. But, again, this is true only if the antenna's output impedance is matched to the splitter's characteristic impedance (including consideration of any impedance transformation in the transmission line between the antenna and the splitter). I cringe at the cavalier treatment given to line impedances used in GPS systems. AFAIK, all GPS equipment is designed for 50 ohms, yet a great deal of such equipment is provided with 'F' connectors, which invite the use of inexpensive RG-6 line, which is 75 ohm cable. In addition to problems with impedances and loading, It's a built-in source of multipath, all at no extra charge! Dana K8YUM On Tue, Jul 27, 2021 at 3:01 PM Don Cross wrote: > On Tue, Jul 27, 2021 at 2:54 PM ordnit via time-nuts < > time-nuts@lists.febo.com> wrote: > > > > > Any guess? Do I have to throw the unit from the window? For your > > reference, I have a samsung unit connected to same antenna via a > > splitter. The GPSDO is performing very well. > > > > > Hi Ordnit, > > I'm hardly an expert, but I wonder about the splitter. Is this a passive or > active splitter? If passive, it could be the input impedance of your > Samsung is much lower than for your new Trimble and it is making the signal > seen by the Trimble too weak. If you are willing to disconnect the Samsung > temporarily, perhaps you could try connecting your antenna to the Trimble > only and see what happens. > > Don > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. > ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] NIST trivia
As time nuts we all know about NIST Time and Frequency work. NIST is involved in the investigation of what happened in the tragic collapse of a High Rise in Miami Surf Side. Bert Kehren ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
