Warren, I like the cheap price of the LeoNTP. The only reason I prefer the Tm1000a is that it has an embedded web server, which lets me monitor the satellite constellation visibility. Otherwise, except for oven-controller time clocks, it seems obvious that the $2000+ GPS NTP servers are overpriced overkill :)
-mel via cell > On Jun 20, 2019, at 8:31 AM, Warren Kumari <war...@kumari.net> wrote: > >> On Thu, Jun 20, 2019 at 11:00 AM Mel Beckman <m...@beckman.org> wrote: >> >> I use the $300 GPS-based TM1000A from TimeMachinesCorp.com. Gets Stratum-1 >> time from GPS satellites and distributes it. Usually I relay this through a >> handful of local time servers to spread out the load, but it can handle >> hundreds of queries per minute, so it’s reasonable to use as a primary >> source even in moderate-sized data centers. >> >> I’ve put in a ton of them, and in most installations I buy two for >> redundancy. The GPS antenna works from a window in most instances . > > I recently fell down the high precision time rabbithole, and now have > 3 GPS units (a Truetime, a Symmetricom S250 and a LeoNTP), 3 Cesuim > Primary Reference sources (an FTS4060, and 2 PRS-50s), and an > assortment rubidium units. > > One of the "standard" solutions is one of the Microsemi (Symmetricom) > SyncServer's, but these can be expensive -- I've been much happies > with the LeoNTP ( > http://www.leobodnar.com/shop/index.php?main_page=product_info&products_id=272 > ) -- they are small, they are cheap, and they fast, they are "accurate > enough", and they just work. I've got one on my desk, with a cheap > (car) GPS antenna dangling out the window, and it syncs and runs > happily. A friend of mine has stuffed one in an IP68 box and it's > hanging happily on the side of a TV tower in the elements with no > issues... > > I get mine from airspy.us - $349 + antenna. > > W > > >> >> -mel beckman >> >>> On Jun 20, 2019, at 7:53 AM, David Bass <davidbass...@gmail.com> wrote: >>> >>> What are folks using these days for smaller organizations, that need to >>> dole out time from an internal source? > > > > -- > I don't think the execution is relevant when it was obviously a bad > idea in the first place. > This is like putting rabid weasels in your pants, and later expressing > regret at having chosen those particular rabid weasels and that pair > of pants. > ---maf
