For the money, those are excellent little GPSDOs... providing that it wasn't
damaged while being salvaged. I got three different models in from 3 different
sources and they all worked well. They are not nearly as tweakable as the
Tbolt (nothing is) but they seem to get the job done.
Hello Attila,
not cheap at that point, and I already have that ST board(I live few km
from ST headquarters, BTW)!.
Still licking my wounds from Eclipse-whatever chaintool, ouch, no way I
am going to mess with that again anytime soon.
I am not in the mood to start another endless project,
The link on EEVblog is
http://www.eevblog.com/forum/projects/a-look-at-my-symmetricom-gpsdo-(ocxo-furuno-receiver)/
the Symmetricom and the Trimble you referenced are almost identical in
operation. Issue is receiving one that works, a bit hit and miss. Apparently
the next version of Lady
Hi
> On Oct 23, 2016, at 2:12 PM, Scott Stobbe wrote:
>
> I would certainly hope a 7912 would be good enough, because at 1ppm rms in
> 0.1 Hz to 10 Hz there is maybe a little over one order magnitude left with
> a dedicated low-noise reference. In all likely hood the
Nice!
(I had one of those, 20 years ago . . . .)
73,
Jim
wb4...@amsat.org
On 10/23/2016 1:49 PM, William H. Fite wrote:
Bravo for boat anchors, Wes. I have a Collins R390 with a tuning gear train
so complex it has to go in every 3000 miles for an oil change.
On Sunday, October 23, 2016,
I would certainly hope a 7912 would be good enough, because at 1ppm rms in
0.1 Hz to 10 Hz there is maybe a little over one order magnitude left with
a dedicated low-noise reference. In all likely hood the reference on board
the thunderbolt likely has 1ppm pk-pk over 0.1 to 10 Hz band. Tempco for
Bravo for boat anchors, Wes. I have a Collins R390 with a tuning gear train
so complex it has to go in every 3000 miles for an oil change.
On Sunday, October 23, 2016, Wes wrote:
> On 10/22/2016 9:22 AM, Chris Albertson wrote:
>
>>
>> You have to remember what this thing
On Sun, 23 Oct 2016 15:32:33 +0200
Giuseppe Marullo wrote:
> I am puzzled about what to do, still the total cost of it for a OXCO +
> GPS(unit with antenna) + control mcu is 67usd, I doubt I could find
> anything like this for a cheaper price new.
Yes, it's cheap for a
On 10/22/2016 9:22 AM, Chris Albertson wrote:
You have to remember what this thing replaces. In ham radio, some people
are using vacuum tube oscillators with mechanical variable capacitor
tuning. Maybe some advanced rigs use gear drive on the capacitor shaft to
allow more exact tuning This
Hi
There is a *long* list of information on that unit over on EEVBlog. Bottom line
is
that if you get a good one (you may not) it is a *much* better solution than
the other
one you are looking at.
Bob
> On Oct 23, 2016, at 9:32 AM, Giuseppe Marullo wrote:
>
> Thanks to
I've been very impressed by the LED/VFD car clocks that come built into
cars for the past 20 years. They have to work in temperature extremes from
below zero to way above 120F when parked in the sun on a hot day. And every
six months at DST time when it's time to reset them, I find they are never
Thanks to all that have answered, as usual very good advices.
I am puzzled about what to do, still the total cost of it for a OXCO +
GPS(unit with antenna) + control mcu is 67usd, I doubt I could find
anything like this for a cheaper price new.
Only cheap alternative could be this
Hi
You *could* calibrate the nominal frequency a chip very cheaply these days.
They may / the
may not, who knows. It certainly *is* done that way on very low cost wrist
watches.
I’d bet that they do and it leaves the factory set within less than 1 ppm.
A good generic crystal is still going
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