[time-nuts] Price of LTE Lite GPSDO vs Trimble Thunderbolt.
SAIDJACK at aol.com
SAIDJACK at aol.com
Fri Oct 17 22:35:22 UTC 2014
thanks much, we sent out notice early today to the folks on our list that
the Ebay store is up and running, and units are selling already. You can
search for "LTE Lite GPSDO" and you will find it there. Your email was also on
The power spec is actually ~160mW for the LTE-Lite module itself not 1/16W
Please note that the LTE Eval kit has some additional circuitry on it (a
USB interface chip, a bunch of LED's, and two voltage regulators) so the
Eval kit power consumption is slightly higher than the LTE-Lite SMT module by
itself, but you are right having the entire GPSDO consume only about ~0.2W
is certainly nice. We did use a linear regulator to go from 5V to 3.3V on
the eval board so that is somewhat wasteful, but alas more quiet.
Here is a fun fact: we used an active HP GPS two-to-one antenna splitter to
test out two boards. One board was powered up through USB, the second
board was supposed to be turned-off. Both boards lit up and worked like a charm
to our amusement, turns out the antenna power coming from one board
supplied enough backwards power through the splitter to make the second board
work perfectly just from that antenna feed.. That mode of operation is not
advised of course, but its possible.
In a message dated 10/17/2014 15:20:51 Pacific Daylight Time,
paulswedb at gmail.com writes:
Don't want to hijack any discussion and am looking forward to the ebay site
and ordering. Whats amazing is the power spec in addition to other specs.
rechecked the spec 1/16th watt at 3.3V. My RB in the basement draws 24
watts just idling along and keeping two hefty SLA batteries charged for a
48 hour run time if needed.
I can clearly see the case of careful support system design such that a
battery set can be charged and even in a power failure run several days on
a small battery.
SLA 7 amp was something like 100 plus hours. Bert introduced me to some of
the Lithium battery technologies that can be had for reasonable cost and
are small and dense.
But that said really no need for a battery since restarts are fast...
Lots to think about. Like LEDs drawing more power then the system and
sloppy base power supplies wasting power.
On Fri, Oct 17, 2014 at 4:53 PM, Pete Lancashire <pete at petelancashire.com>
> Sorry to create any misunderstanding
> I was saying thanks to TVB/TAPR for all their effort, and Said/JLT for
> doing what they did for the group
> I was in no way comparing the used Thunderbolts to the LTE Lite.
> On Fri, Oct 17, 2014 at 1:13 PM, Jim Sanford <wb4gcs at wb4gcs.org> wrote:
> > And, somehow I expect that my LTE-LITE will actually work, which my
> > thunderbolt never did. (Very noisy) It continues to collect dust....
> > On 10/17/2014 3:49 PM, Pete Lancashire wrote:
> >> First three cheers to LTE for making these available.
> >> It reminds me when Motorola made a developers kit for the then
> >> new 68HC11 MCU available for $68.11.
> >> I know of one design win they got that more then made of their
> >> costs.
> >> Another that hit me is with inflation the LTE Lite is not much more
> >> what many of us paid for our Thunderbolts.
> >> For those new to the list ...
> >> https://www.febo.com/pipermail/time-nuts/2008-May/031100.html
> >> http://www.leapsecond.com/pages/tapr-tbolt/
> >> In 2008, $124, the LTE Lite in 2014 $195.
> >> With 'real' inflation (not the 11% you get online) the $71 difference
> >> not much more.
> >> My two backup Thunderbolts cost me $145 each, just before they hit
> >> then became history.
> >> Again thanks to Said and JLT !!!!
> >> -pete
> >> _______________________________________________
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