alt Hacker News(2017)
I've looked at doing this a few times. I don't have references handy but there are cheaper atomic oscillators available now, under $1000. Still to expensive for me to justify it but one of these years I'll find one cheap.
Replies
jacquesm • yesterday at 6:58 PM
Go hunt up a Rubidinium standard on Ebay, $150 or thereabouts and you'll have a pretty good standard.
I have an NTP clock that uses GPS PPS and has a local TXDO. For any reasonable amount of time that you'd be out of GPS (barring nuclear war) a TXDO should be plenty sufficient for any sane time-related needs at a tiny fraction of the cost. Serving as a frequency reference for radio or precision counters or other semi-exotic (for at home) is the only reason I can see to actually have CSAC other than cool factor. Which, fair.