Cost effective time servers

Thu Jun 20 15:30:39 UTC 2019

On Thu, Jun 20, 2019 at 11:00 AM Mel Beckman <mel at 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 <davidbass570 at 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