1. Re: Need Time Help (Mark Spencer)
2. TNS-BUF Amplifier (James Robbins)
3. Re: Need Time Help (Chris Caudle)

Re: TNS-BUF Amplifier --Jim Robbins wrote: Many thanks for your helpful TN work to John A. , Dr. Bruce and John M. Ordered 3 pieces. ---------------------------------------------------------------------------------------------- I second the thanks and ordered 2 pieces --Jim Stone On Wed, Oct 5, 2016 at 9:00 AM, <time-nuts-request@febo.com> wrote: > Send time-nuts mailing list submissions to > time-nuts@febo.com > > To subscribe or unsubscribe via the World Wide Web, visit > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > or, via email, send a message with subject or body 'help' to > time-nuts-request@febo.com > > You can reach the person managing the list at > time-nuts-owner@febo.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of time-nuts digest..." > > > Today's Topics: > > 1. Re: Need Time Help (Mark Spencer) > 2. TNS-BUF Amplifier (James Robbins) > 3. Re: Need Time Help (Chris Caudle) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 5 Oct 2016 07:35:21 -0700 > From: Mark Spencer <mark@alignedsolutions.com> > To: Peter Torry <peter.torry@talktalk.net>, Discussion of precise time > and frequency measurement <time-nuts@febo.com> > Subject: Re: [time-nuts] Need Time Help > Message-ID: > <DBFC5AA1-67C3-4DDD-BB8F-EE398A7E022D@alignedsolutions.com> > Content-Type: text/plain; charset=us-ascii > > Yes I'd be curious in knowing more about this as well. I've often > observed time differences from other stations of several tenths of a second > when running the JT modes on HF. Although I am beginner at EME I have made > a couple of EME (earth moon earth) JT65 contacts on VHF without taking any > special measures to sync the time on a Windows XP machine beyond using the > built in features of the operating system to sync to my own local time > server which was in turned synced to the 1 pps output of a GPS timing > receiver. > > I've also made FSK441 contacts (another related form of amateur radio > digital communications) in the field without any time reference besides the > free running clock in my Windows xp laptop. If there is a significant > performance improvement to be had with these modes by having time nuts > levels of timing precision on my computers I'd be very interested to know > more. > > All the best > Mark S > > Sent from my iPhone > > > On Oct 5, 2016, at 6:18 AM, Peter Torry via time-nuts < > time-nuts@febo.com> wrote: > > > > I must admit to being rather puzzled at the sub microsecond timing > requirement as I use ntp to set the W7 clock in my computer and have not > had any issues. In fact less than one second is OK for the usual two minute > periods that are required to allow for the Faraday rotation. Although I use > a GPSDO for a frequency reference I find JT software reasonably tolerant of > frequency. As I may be missing something I would welcome observations on > how important the period timing requirement is, you never know I might get > more contacts. > > > > Regards > > > > Peter > > > > > >> On 05/10/2016 12:50, Graham / KE9H wrote: > >> For the group. This ham is trying to work EME. Earth-Moon-Earth > propagation > >> path. Aka, "moonbounce." > >> > >> He is trying to time synchronize a system, where the other station he is > >> communicating > >> with can be any other place on the Earth that can also see the Moon. > >> > >> So the system time sync is for a little bit tougher case than a local > area > >> network. > >> > >> --- Graham > > > > _______________________________________________ > > 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 there. > > > > > ------------------------------ > > Message: 2 > Date: Wed, 5 Oct 2016 10:56:05 -0400 > From: "James Robbins" <jsrobbins@earthlink.net> > To: <time-nuts@febo.com> > Subject: [time-nuts] TNS-BUF Amplifier > Message-ID: <01c301d21f18$9994aee0$ccbe0ca0$@earthlink.net> > Content-Type: text/plain; charset="us-ascii" > > Many thanks for your helpful TN work to John A. , Dr. Bruce and John M. > Ordered 3 pieces. > > > > 73, > > Jim Robbins > > N1JR > > > > ------------------------------ > > Message: 3 > Date: Wed, 5 Oct 2016 10:19:10 -0500 > From: "Chris Caudle" <chris@chriscaudle.org> > To: time-nuts@febo.com > Subject: Re: [time-nuts] Need Time Help > Message-ID: > <c250d2aeb72af61ded8aafda4b9f27b1.squirrel@email.powweb.com> > Content-Type: text/plain;charset=iso-8859-1 > > On Wed, October 5, 2016 6:14 am, Bob Camp wrote: > > If you buy a GPS receiver and get it set up for timing, just use it. > > Then there is no need for NTP at all. > > Is there another way to get computer system time set from a GPS receiver > other than NTP? > In the case that the system clock is controlled by GPSDO and the seconds > delineated by PPS, there should be no need for the NTP clock discipline > code, but I am not aware of any way to inform the NTP daemon that no > disciplining is needed. Presumably the code should determine that > eventually. > > In the case that the system clock is free running, the clock discipline is > still needed, but I found a note in one of the NTP documents (that I can > no longer locate at the moment) that stated something to the effect that > NTP did not run well as it could with a single reference, which would seem > to directly affect the case where a GPS receiver is the only reference. > That document had only that short note, no details on why or specifics of > behavior. > > -- > Chris Caudle > > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > ------------------------------ > > End of time-nuts Digest, Vol 147, Issue 13 > ****************************************** >