Li¡ªyou are correct. ?All of this GPS stuff is superfluous provided that you know your location and your real-time clock isn¡¯t terribly terribly off. Which isn¡¯t likely to be. And it¡¯s easy to sync with WSJT anyway. ??
However, for our field day effort, our group wanted to demonstrate full emergency communications capabilities without any Internet, and so we built an NTP server that is independent. ?We are an ARES group
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On May 19, 2025, at 10:49, Li Cao via groups.io <licao081@...> wrote:
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I¡¯m wondering why we would need this. Not sure about sBitx, doesn¡¯t the zBitx have a high precision RTC with coin battery inside ? I saw some posting about a zBitx user found the battery missing when it arrived . It should not drift off too much if you sync the clock recently (I am thinking within a couple of weeks at least)
Li KQ4EXQ
On May 19, 2025, at 9:08?AM, Gordon Gibby KX4Z via groups.io <docvacuumtubes@...> wrote:
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Thanks, Andy!
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We had to deal with this a year or so back, so that we could compete in FIELD DAY with FT8/FT4 without requiring any internet.? ?There are of course many ways to "sync" these signals and they are pretty resilient even to being off more than a second -- but we wanted a general purpose solution.? So we built our own NTP server using a cheap dongle GPS receiver and software on a raspberry pi.? ?Something similar should work on the SBitx etc...
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We built ours as a standalone system and have used it in a couple of Field Days I think now with good success.
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Gordon KX4Z
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