I understand why a low-volume shipment of what started as a board costing a few pennies costs $50, but does that simply mean that low-cost parts aren't the right answer for this sort of application ?
How would an SDR based on a raspberry pi zero, a suitable ADC and a tuned rx circuit compare ? On Tue, Dec 4, 2018 at 4:54 PM David G. McGaw <[email protected]> wrote: > It does a very good job of pulling the signal out of the noise. It > works in NH, traditionally a fringe region, in all but the most shielded > of rooms. I also had occasion to test it for Everset in Kangerlussuaq, > Greenland. I found it had no trouble acquiring at any time of the day. > If the ES100 does not do well enough for you, there is supposedly an > ES200 available that uses a longer sequence for even more sensitivity. > > The one thing I wish is that there were access to the synchronized > analog signal and/or a 1PPS. Even a top of the minute would be useful. > It only has the I2C digital interface. > > 73, > > David N1HAC > > > On 12/4/18 11:35 AM, Tim Shoppa wrote: > > Thanks for the heads up Tom! I ordered one and if it comes before the end > > of the year I may have some time over the holidays to do acquisition test > > from Maryland and maybe some cross-comparison with GPS PPS. > > > > Here in Maryland I have somewhat unreliable reception on commercial > > non-BPSK WWVB clocks at my house. My Casio Waveceptor watch is 99%+ > > reliable when I'm asleep on the 2nd floor but much less likely to work in > > the basement. I can reliably hear the amplitude-keyed WWVB carrier on a > LF > > receiver with a homebrew loop (about 3 foot by 3 foot) in the evenings > but > > it takes some imagination to think I can hear it during the daytime. > > > > Tim N3QE > > > > On Mon, Dec 3, 2018 at 9:12 PM Tom Van Baak <[email protected]> wrote: > > > >> At long last, a complete WWVB 60 kHz BPSK dev board is available: > >> > >> > >> > https://universal-solder.ca/product/everset-es100-cob-wwvb-60khz-bpsk-receiver-kit-with-2-antennas/ > >> > >> Note it includes the antenna(s). Also has links to documentation. > >> > >> It would be very nice if a bunch of time nuts around the country played > >> with these and reported results. > >> > >> Prior to this, the only device that you could buy which used the > enhanced > >> WWVB format was the La Crosse 404-1235UA-SS UltrAtomic clock. It was not > >> developer friendly, so a dev board with the Everset ES100 chip is good > news. > >> > >> The maker / hacker / Arduino crowd may enjoy a fresh source of accurate > >> time; something independent of GPS or NTP. Some technical postings about > >> reception quality, acquisition speed, and timing precision would be most > >> welcome. > >> > >> /tvb > >> > >> > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to > >> > https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.febo.com%2Fmailman%2Flistinfo%2Ftime-nuts_lists.febo.com&data=02%7C01%7Cdavid.g.mcgaw%40dartmouth.edu%7C8dfafb55bead4b3f8bb908d65a06ad0f%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C636795382058128330&sdata=xDyGyjr0V68u6EZiaR0hAPHjHLBuXHTLg0A5OiSHd%2FI%3D&reserved=0 > >> and follow the instructions there. > >> > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.febo.com%2Fmailman%2Flistinfo%2Ftime-nuts_lists.febo.com&data=02%7C01%7Cdavid.g.mcgaw%40dartmouth.edu%7C8dfafb55bead4b3f8bb908d65a06ad0f%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C636795382058128330&sdata=xDyGyjr0V68u6EZiaR0hAPHjHLBuXHTLg0A5OiSHd%2FI%3D&reserved=0 > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
