Not of much help, but: The tbolt doesn't do a new survey if the stored position matches (to a few meters afair). In a similar occurrence, many years ago, I've repaired a modem that was hit by a close EMP by replacing the RS-232 level translator ICs (75188, 75189 or whatever is used on a tbolt).
HTH Frank On Sat, Apr 9, 2022 at 7:25 AM Neville Michie <[email protected]> wrote: > > Hello All, > I had a thunderstorm with a close discharge, the flash and bang were > simultaneous. > And very loud/bright. I found no sign of a ground strike, but I had damage > from the EMP. > My Broadband modem was damaged, the router died (all the lights went out and > the power supply > ran hot). All the ethernet ports were blown out. > When I looked at my Thunderbolt disciplined clock it was still running. Lady > Heather showed no > signals from the thunderbolt. > After faultfinding everything, a serial port on the computer was dead, the > thunderbolt output > was silent, but it was still outputting PPS and 10MHz. The antenna on a mast > 4 feet above the roof was OK. > The serial port on the old PC was a plug-in card, but the other ports on > other cards still work. > Eventually, I set up another GPS receiver and compared the PPS signals. The > thunderbolt still works > but has been struck dumb. > After power up, the tbolt synchronises with the satellites and sends PPS and > 10Mhz. > What I want to know as it is not clear in the Thunderbolt manual, just what > systems run > when you do not send any commands to the tbolt on start up? Does it do a > survey, or is mine > using a stored position, or does it do a new survey? Can I keep using the > tbolt in spite of the fact > that I can not not use Lady Heather again? > cheers, > Neville Michie > _______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send an > email to [email protected] > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
