yes I still have a modified 468 that works using some stuff I design back in 2005. I do power the dc468 up every now and then. Still works. Though a couple of the panaplex displays are getting a bit cranky. But completely agree that GPS has seriously spoiled me as it drives time code clocks. Regards Paul WB8TSL
On Fri, Aug 10, 2018 at 10:18 AM, Tom Van Baak <[email protected]> wrote: > Tim, > > Thanks for posting that photo. That space age 1976 GOES clock caught our > eyes when the paper came out in 2005 (see also pages 11, 12, 13): > > https://tf.nist.gov/general/pdf/2013.pdf > > There was quite a bit of traffic on time-nuts around 2005 when the GOES > satellite time service was turned off (and back on, and off, and on, and > finally off for good). That left many of us with piles of 468 MHz GOES > receivers, antennae, clocks and led to efforts to re-create the RF signals > in-home so that GOES clocks would still work. There was even a commercial > G2G (GPS to GOES) translator. > > Anyway, I asked around about that one-off bicentennial clock in the photo > and neither the authors, NIST, or Smithsonian knows where it ended up. > There's tons of information on the GOES satellite system and GOES clocks in > the NIST T&F archives: > > https://tf.nist.gov/general/publications.htm > > Best to search title for GOES, or search author for Hanson. It's a > fascinating glimpse into the recent past. Yes, it's sad that GOES (and > Omega, and Loran-C) aren't operational anymore, but GPS does such a better > job. Plus we now have cable, WiFi, cell phones, the internet, Iridium, etc. > > If you wanted to build your own Bicentennial GOES Clock, the design was > published, including source code -- for its i4004 (!!) CPU. If you have > even one minute to spare, see attached image and click on these two PDF's: > > "Satellite Controlled Digital Clock System (patent)" > https://tf.nist.gov/general/pdf/1791.pdf > > "A Satellite-Controlled Digital Clock (NBS TN-681)" > https://tf.nist.gov/general/pdf/452.pdf > > /tvb > > > ----- Original Message ----- > From: "Tim Shoppa" <[email protected]> > To: "Discussion of precise time and frequency measurement" < > [email protected]> > Sent: Wednesday, August 08, 2018 7:29 PM > Subject: [time-nuts] Bicentennial GOES satellite clock > > > > See the groovy picture at > > https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4847573/ > figure/f9-j110-2lom/ > > > > If anyone knows the whereabouts or history of the bicentennial GOES time > > clock display, please let me know! > > > > Tim N3QE > > > _______________________________________________ > 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.
