On 5/6/2018 6:39 AM, Charles Steinmetz wrote:
So, yes, a sound card designed for signals up to ~22kHz should handle
SAQ at ~17kHz, but sound cards that can digitize signals above 22kHz are
rare. Some "professional" sound cards handle signal frequencies up to
~40kHz, but very, very few handle
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If you have a sound card capable of sampling at 192 kS/s, you don't need an SDR
to receive a signal at 60 kHz... just connect the output of an active antenna,
like
e.g. the mini-whip, directly to the Line-In of the sound card, then use, for
example,
HDSDR as software, setting the sampling
On 1/8/2018 11:12 PM, Neville Michie wrote:
I have just scanned through the Thunderbolt manual and found no information
on the supply of power to the antenna.
Is there a standard for the supply of power to the antenna?
Are there 3.3v , 5v and 12v antennae?
Will any antenna work safely on any GPS
The problem with the 9854 DDS is that the analog reconstruction filters that you have to place after its outputs, are
not guaranteed to have
*exactly* the same phase behavior between the two sections (I and Q). This may or may not be important, depending on
the application.
For sure, for an
Message resent... I had forgotten that this group is HTML-fobic
=
On 12/3/2017 12:22 AM, jimlux wrote:
In SDR implementations (obviously not the Timecube) the latency can be
quite long, and can be variable. Most SDR implementations
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On 3/6/2017 3:47 PM, Graham / KE9H wrote:
What antenna are you using that you call the "mini-whip?"
Specifically, how long is the "whip?"
http://dl1dbc.net/SAQ/miniwhip.html
73 Alberto I2PHD
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On 2/15/2017 5:29 PM, Tim Shoppa wrote:
For those of us who have to translate between the old "cps" and the modern
"Hz", I found this handy conversion table on the web:
http://www.aqua-calc.com/convert/frequency/hertz-to-cycle-per-second
Tim N3QE
Nahhh this is much better :-)
On 12/12/2016 7:38 PM, Azelio Boriani wrote:
Maybe that the "Start In" field in the Properties Panel must be set if
windows is not in US language mode. When windows is italian, for
example, the Program Files folder becomes Programmi.
Azelio,
none of my PCs is set for Italian languages...
On 12/12/2016 12:00 AM, John Miles wrote:
But when Heather's initial working directory isn't in the usual Program Files
hierarchy,
it tries to load the .cfg file from the same directory as the executable.
In my case the ,cfg files was in the same directory as the executable, outside the
On 12/11/2016 1:25 AM, Mark Sims wrote:
The heather.cfg file has a com port setting (/1u) and a /rxa (receiver
auto-detect) command
line option setting which gets processed before the settings on the command
line.
Try editing heather.cfg file and change the /1u command to /0
Problem
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On 12/10/2016 4:56 PM, Mark Sims wrote:
Lady Heather version 5.0 is now available for download from:
http://www.ke5fx.com/heather/readme.htm
Thanks for this new version.
I started it under Windows XP SP3, with the option /rxx as I currently have my
TBolt
connected to another PC, but
On 12/2/2016 8:01 PM, jimlux wrote:
If anyone needs it, I've got python and Matlab/Octave code to read and decode VRT format files, although I don't
support ALL possible sample encodings. The standard contemplates all sorts of strange packing and formats - I do
signed 16 bit and signed 24 bit.
On 10/30/2016 9:57 PM, Alberto di Bene wrote:
Maybe I am wrong, but, if memory serves, you can only choose between COM1 and
COM2. Higher port numbers
are not accepted.
Well, I was definitely wrong... I looked at the readme.html document of LH, and it says, when describing the command
line
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On 10/30/2016 4:15 PM, Richard Mogford wrote:
I read that to change the COM port in Lady Heather, you type “/“ and then the
COM port number, such as 3. So you enter “/3” to change to COM 3.
i tried this, but it does not seem to change the input COM port from 1 to 3.
Maybe I am wrong, but,
On 10/6/2016 8:10 PM, Wes wrote:
Although I personally ceased pursuing this activity many years ago, there remain
some of us, who are not Luddites, but still believe that "Deep Search Decoding"
is a questionable practice, no matter how it is rationalized.
"Deep Search Decoding" of the JT
On 3/2/2016 4:30 PM, jimlux wrote:
New Horizon's telecom design is here:
http://www.boulder.swri.edu/~tcase/NH%20RF%20Telecom%20Sys%20ID1369%20FINAL_Deboy.pdf
...
Jim, thanks.
Quite a lot of material to read... I am sure it will be useful for a new
Pardon me for the OT request... I know that some of you are deeply involved
with space communication
(may be Jim Lux ?) and I am quite curious about the Forward Error Correcting
codes used in the New
Horizons probe, that as of now is beyond Pluto, and still sends correct photos
with its meager
On 8/12/2015 8:29 PM, Hal Murray wrote:
How long did you wait after turning it on?
How good is your antenna position?
Did you tell it to remember the location after a survey finished?
If it's been off for a few weeks, it doesn't know where the satellites are.
To get started, it has to find one
Today I switched on again my TBolt after a few weeks of power down.
It looks like it has decided to take a period of rest, maybe definitive...
The link below is a screen capture of LH, with some annotation from me.
Is there anything that, in your experience, I can try to diagnose the failure
and
On 8/5/2015 12:43 AM, Donald wrote:
/Does anyone have a schematic for building a simple WWVB receiver ?/
You might give a look at this :
http://armradio.weaksignals.com
The board itself costs less than 25 USD. The other components just a few $$.
Of course you need to know how to solder...
On 4/23/2015 9:20 AM, VK2DAP wrote:
/1) Generally speaking, would it be correct to say that when a product model
number changes from A to B,//
//that represents an improvement or major update to a product?/
I remember having read (don't recall where...) that the HP5328B was a
cost-reduction
On 2/20/2015 4:25 PM, Jim Lux wrote:
/For an inexpensive NTP for few hundred dollars to get better than a
millisecond end of things, I think the integrated GPS antenna/receiver
with a suitable computer right next to it is the way to go. Then you're
just running a network cable and power.
/
Probably best to just pop it open and see what’s inside. Unless you get very
lucky, the
fiber optic cables, connectors, and transmitter / receivers will be tough to
find.
Thanks Bob, Jim, Chris, David for your answers.
Well, I have already a few timing resources, like a Thunderbolt, a
On 1/27/2015 11:57 PM, Bruce Griffiths wrote:
/The only viable solution is to use better filtering of the output of a
switching multiplier./
What about filtering the doubler output with a 10 MHz xtal ?
73 Alberto I2PHD
---
This email has been checked for viruses by Avast antivirus
On 12/12/2014 10:08 PM, Hal Murray wrote:
/Our clocks aren't good enough.
It's a very hard problem. Here is the scale:
//http://www.ligo-la.caltech.edu//
Yes. There are experiments set up in the US, in Italy and in Japan, to detect
gravitational waves, funded by various universities.
So
On 11/28/2014 6:57 PM, Bob Camp wrote:
/A mountain top (or skyscraper top) communications setup can be designed to//
//take multiple direct lightning hits an hour and keep right on going and do//
//it for may years. There are//*lots*// of systems out there like that./
Last April 25 there was
On 4/10/2014 11:38 PM, Hal Murray wrote:
Does anybody have a favorite low-cost ARM board? I'm looking for a simple
Arduino like setup rather than something that runs Linux. The idea is to get
32 bit counters so a bunch of the recent discussion can be ingnored.
==
I can't recommend
Don't know what happened... my previous message was relayed with an almost
empty body...
Here it is again.
73 Alberto I2PHD
=
On 1/14/2014 8:05 PM, lstosk...@cox.net wrote:
/This isn't drawing lots of attention, but
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On 1/8/2014 11:13 PM, Alan Melia wrote:
/Hi Alberto it is quite interesting to continue that test with no attenuator
but the shells of the coax plugs connected together. I would guess with the
gear you have the resultant would be at least 120dB downbut this is
not the case for all
On 1/6/2014 2:13 PM, Giuseppe Marullo wrote:
/I would like to know the specs for this attenuator, especially the
maximum frequency, if any good folk has a ballpark idea...
I was not able to locate any info about it./
I too have one, bought cheaply a couple of years ago on eBay. I tested its
On 9/19/2013 5:33 AM, Chris Albertson wrote:
But 10KHz does allow
a simpler design for the GPSDO that can be done 100% analog
A very simple, full analog, GPSDO that exploits the 10 kHz from a Jupiter
GPS receiver can be found here :
http://gpsdo.i2phd.com/
73 Alberto I2PHD
On 8/27/2013 5:25 PM, Steven Kluck wrote:
/If I had a couple of extra cesium frequency references, I would want to
try Roland de Witte's experiment. Simple and fascinating! Position one
clock about 1500 meters to the east of the other, set up a long
(temperature controlled) coax cable
On 8/17/2013 5:52 PM, Chris Albertson wrote:
/TI sells their MSP430 Launch Pad for $10 (shipped)/
Much better than that. TI has reduced the price of the
EK-LM4F120XL Stellaris LM4F120 LaunchPad Evaluation Board
which now costs USD 7.99 shipped...
And that board sports a Stellaris LM4F120H5QR
On 8/7/2013 3:44 AM, Chris Albertson wrote:
/These phone now days have quad core 32-bit CPUs and GPUs that can
be tapped for compting power for thing like FFTs and other DSP./
Much less is needed... next September it will be released a new SDR that runs on
an ARM Cortex M4F, single core, that
On 8/7/2013 6:02 PM, Russ Ramirez wrote:
/Hi Alberto, can you say which SDR software this is? I have a TI TIVA board
that is M4F based and am wondering if this new SDR code will support boards
like this./
Hi Russ,
I am afraid it is not a software untied to a specific hardware...
The
On 8/6/2013 5:12 AM, Chris Albertson wrote:
/It depends of it you want to be the kind of ham who understands radios and
can build and design them or the kind who would have never remove the cover
off his commercial built radio.Linux is the best OS for developers and
those who like to build
On 8/5/2013 11:52 PM, J. Forster wrote:
75 to 1300 MHz
USB
Ability to function as a crude SA.
Not crawling w/ birdies or aliasing issues.
Will run on Win XP.
Demod selecttable for all modes at all frequencies.
In a package, rather than a loose PCB.
$150
I bought this from China :
A really fascinating story in pictures of the preparation and manufacture of
quartz crystals for radio communication.
Dating back to 1943... how times have changed...
Copied from another list.
http://archive.org/details/6101_Crystals_Go_to_War_01_20_16_21
73 Alberto I2PHD
On 7/1/2013 10:47 PM, Attila Kinali wrote:
General rule of
thumb: if lots of people are using it, there is a better chance
to find good support for it. The Odroid/hardkernel boards are a nice
negative example in that regard.
Attila,
could you please comment a bit further on the Odroid
On 6/27/2013 9:09 PM, KD0GLS wrote:
/The PT5101 was the 5-volt version. I think there is (or used to be) a 3-amp
series as well, but I don't recall the part number. Maybe with a little
digging on the TI website you can find a suitable replacement that will meet
your needs. Last time I
On 3/26/2013 7:21 PM, Dan Kemppainen wrote:
Keep in mind, we are after all, taking about windows. An operating
system that IS NOT real time operating system. (You think it is, try
move a continuous stream of a few 6+ MBytes/Sec data to it!)
Well, the Perseus SDR, when set to its maximum
On 1/7/2013 1:25 AM, Jim Lux wrote:
If you're building a standalone widget (e.g. something like an NTP
server we've been discussing, etc.) with an embedded PC, don't want to
fool with hardware designing, etc.; use off the shelf OSes (win and
Linux) and software (Matlab, Labview); have solid
On 1/1/2013 9:42 PM, Tom Harris wrote:
If you can look at the output of a DCF77 demodulator you should see a nice
clean set of 100ms/200ms pulses every second. All you need is a CRO, or you
could just use a LED to indicate the state.
This is how DCF77 looks, when received with an SDR
On 11/3/2012 6:32 AM, Sarah White wrote:
/Wonder if there is any sensible way to petition microsoft to fix this
stupid mistake dating back to the DOS era. Windows 8 / metro is out now,
and I can't bloody stand the changes. Would be nice if windows 7 had an
update to fix this issue:
On 11/3/2012 6:31 PM, Orin Eman wrote:
There was also OS/2...
The best OpSys ever killed by IBM itself, as an internal, confidential,
report
indicated that developing middleware for Windows NT could produce much more
revenues than continuing to develop OS/2...
So they decided to let it
On 7/30/2012 6:39 PM, Chris Albertson wrote:
I use one just like auction #180518378555. It is only 26dB but the
thing is very reliable. It is a helix antenna inside and the mounting
holes on the bottom line up with a standard iron pipe flange so
mounting is easy.
That's exactly the same
On 5/2/2012 5:47 PM, cfo wrote:
The mail actually looks quite authentic , Correct name phone# etc.
But i have never heard of such a request before. And was wondering if any
Italian T-Nut could verify that this request is valid.
It seems a bit strange to me ...
I am from Italy, and I can
On 2/23/2012 1:04 AM, Poul-Henning Kamp wrote:
I simply don't buy the story that tightening the connector makes
a consistent 60 nanoseconds difference on a signal.
I spoke with a physicist of Cern, friend of the leader of the team that
performed the Opera experiment.
He told me that
On 2/9/2012 3:36 AM, John Ackermann N8UR wrote:
As threatened, I've measured stability (out to a trustworthy 10K
seconds) and phase noise of the three popular telecom surplus Rb
standards. I looked at two units of the FE-5680, two units of the
Efratom FRS, and one Datum LPRO.
Which variety
I managed to take a photo at the scope screen showing the 1 pps pulse
from an old FE-5680A (the one that does not need the 5V and does not
output the oscillator signal - just the 1pps).
Exposure was 30 sec, F9. The signal was barely visible with naked eye,
and some jittering is present. The room
On 1/5/2012 11:26 PM, Jim Palfreyman wrote:
Leap second has been announced for July.
Jim
Yes, this was copied from another list :
Subject: Bulletin C number 43
INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)
SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES
I received as a gift from a friend what looks like a timing GPS
antenna integrated with the receiver, with optical links
for Rx and Tx (?).
This the label on the box :
http://dl.dropbox.com/u/15089947/NavSymm2.jpg
And these are the upper and lower sides of the unit :
On 12/30/2011 6:38 PM, Chris Albertson wrote:
Mine was sent by China Post. The Chinese post office. Took 10 days
to get to California. For me, this is typical for stuff I buy from
Chinese eBay sellers. The Hong Kong Post is slightly faster. I've
think it might just be a matter of luck
On 12/30/2011 8:59 PM, Murray Greenman wrote:
2. The excellent 10kHz design by James G3RUH
http://www.jrmiller.demon.co.uk/projects/ministd/frqstd.htm requires a 10kHz
GPS source, and folk on this group asked where you can get a modern GPS
module with 10kHz output. One suitable answer is
On 11/20/2011 8:17 PM, Robin Kimberley wrote:
http://www.bbc.co.uk/news/science-environment-15791236
Thoughts anyone?
Theoreticians are inclined to think in terms of a fourth spatial dimension.
This is the current line of thought at CERN. In this perspective, the neutrinos
would have traveled
On 11/20/2011 11:17 PM, Hal Murray wrote:
How does that interact with the SuperNova observations?
I thought that was a good match for current theories.
From what I know of the supernova observations (very little, indeed), in that
case there were
some assumptions, impossible to verify for
On 11/10/2011 11:02 PM, Peter Bell wrote:
Assuming it's the same as the units I have (two labels, with FEI P/N
217400-30352-1 on the upper label and two barcodes on the lower
label) then the +5V supply runs all the logic in the unit.
It looks like there are many variants of the FE-5680A...
Al it does it capture a timmer/counter when a pulse comes in. Then fets a
flag a user program can read that says data available. The user level
programs reads the device ad gets the captured counter value, the flag is
reset. Very simple and very low overhead.
How does the pulse trigger the
A simple way to measure the line frequency (up to a given precision...)
is to watch on a waterfall program to one of its harmonics.
In the following picture you can see the 53rd harmonic of the 50 Hz line
frequency in Italy. It was captured by just connecting a random length
of wire to the line
On 6/26/2011 6:03 PM, Tom Van Baak wrote:
Alberto,
That's a cute plot. I see 53 x 50 = 2650. What is the x axis scale?
Tom,
that capture was taken a few months ago, from memory it should cover about
15 or 20 minutes.
But I'm curious -- the pending issue with 60 Hz in the US is more about
Every time I switch on my Thunderbolt (cold start) Lady Heather tells me that
there are no
almanac data. It takes a few tens of minutes before they are collected again.
I was under the impression that TB had some sort of non volatile memory, and it
must have it,
as it is capable of remembering
On 5/27/2011 10:58 PM, WarrenS wrote:
The Tbolt uses a special method to get high resolution data from its
temperature sensor by combining three things.
The first is the sensor's standard data output which is used for the most
significant bits. This gives about 1 deg resolution.
2nd an
On 5/27/2011 10:58 PM, WarrenS wrote:
The Tbolt uses a special method to get high resolution data from its
temperature sensor by combining three things.
The first is the sensor's standard data output which is used for the most
significant bits. This gives about 1 deg resolution.
2nd an internal
I left my Thunderbolt running with Lady Heather started. Returning after a few
hours in the room,
which is at a constant temperature (underground, no heating, no air
conditioning), I found the
following plot on the Lady Heather screen :
http://www.sdradio.eu/images/ladyheather.gif
which shows
On 5/27/2011 8:59 PM, francesco messineo wrote:
since the plot has a step jump, seems only a few tens mC, and then it
comes slowly back to the normal track, I'd rule out at least an
external temperature change: the thunderbolt can easily detect an hand
in its proximity even for a few seconds,
On 12/9/2010 11:18 PM, Roberto Barrios wrote:
Luckily I've been able to invest a few unexpected evenings on the manual and
all the long boring work is already done. I'm now reviewing it thoroughly as
I'd like to avoid having to fix silly mistakes after people have already
downloaded it
On 6/29/2010 11:10 AM, Attila Kinali wrote:
Yes, 16bit D/A seems to
be the maximum that is currently available. It crossed my mind
to build a 24bit R-2R D/A using discrete components, but this might
have actually a worse performance than a off the shelf 16bit D/A.
(temperature drifft, resistor
What are the differences between the two GPSDOs referenced in the subject ?
While Internet is plenty of information on the 3816, the 3815 seems to be
rarely (if ever) referenced..
TNX
Alberto I2PHD
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Marco A. Ferra wrote:
Do you have any experience on this equipment (we don't have the manual, just
a brochure with a few pages [1]), the DCF77 signal itself or an ideia for a
antenna that could be very sensitive to this signal?
If you want to buy it ready made :
Anybody has some more info about this ?
http://tinyurl.com/yjeaodn
Alberto I2PHD
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Dick Moore wrote:
Mark -- my friend, mentor, and former employer, Paul Klipsch (sadly,
now deceased) used to use the unit of furlongs per fortnight -- also
ffn,
1 Furlong= 660 ft = 201.168 m
1 Fortnight = 14 days = 1,209,600 s
One furlong per fortnight is very nearly 1
Dave Baxter wrote:
Personally, I wouldn't bother with any high accuracy clock/oscillator
for the SDR, unless you can also synch the AD sampling clock in the
soundcard.
The SDR-IQ, SDR-14, Qs1r, Perseus and the HPSDR project do not rely on a sound
card ADC to sample any signals.
The RF
J.D. Bakker wrote:
You could always transform this from a hardware problem to a software
problem. Take the output of your GPSDO, divide it down to somewhere
inside the audio band, feed it to a spare input on your USB sound
card and have software track this reference and correct the received
Magnus Danielson wrote:
No need to switch on the soldering iron...
Never do in hardware what can be done in software :-)
Respectfully I disagree. There are tasks which is better managed by
software and tasks which is better managed by hardware. In the world of
FPGAs, it is also worth
Magnus Danielson wrote:
Hmm, do you get a feeling that I am actually object very much to just
toss it into the processor. I think you are right. :)
I suppose you are familiar with the old American adage that says that to a man
with
a hammer every problem looks like a nail :-)
Each of
WarrenS wrote:
Dick
Here is one way to add 2 LS bits (or more) to any Dac no matter how it is
made.
This assumes that the Dac that you are adding these bits to is 0 to 5 volts
Fullscale
and accurate enough to justify adding LS bits.
To add 2 LS bits to a 14 bit Dac.
An easy ways to
And beware from the CE Mark on goods coming from China
What it does mean is just China Export, and I am not kidding...
73 Alberto I2PHD
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Somebody had to pose this question... given the respective sizes of the Trimble
Thunderbolt and the HP Z3801A, the
simplicity of the first and the complexity of the second, it comes natural to
ask ourselves, what advantages does the HP
unit have to justify the differences ? Is the Z3801A
What is the power splitter glued on some of the Thunderbolt units meant for ?
Apparently it is good up to 500 MHz, so it can't be used for the signal coming
from the antenna.
Maybe it was just part of complete product which the Thunderbolt was part of.
Just curious
73 Alberto I2PHD
Phil Staton wrote:
For Info:
Importing 2 TBolts into the UK costs $29.11 duties and fees.
Phil G4FXY
I think that depends on the carrier. I received recently items from the US. In
one case the shipping was done using the
TNT - Traco courier, and they dutifully passed the goods through the
I know that many of the readers of this group are quite familiar with OEM GPS
boards, generally used to build GPSDOs or
something similar. I happen to have a Conexant GPS board, Part # TU30-D160-031
and I am in search of the relative
datasheet. I find on Internet many references to similar
If somebody needs the User Manual of the Z3801A, it can be downloaded from here
:
http://www.weaksignals.com/bin/Z3801A_UserManual.pdf
73 Alberto I2PHD
P.S. It will stay there a few days only, so if you need it, get it now.
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Poul-Henning Kamp wrote:
I would suspect that the higher domes is a concession to weather:
when mounted on a building or tower, a steeper angle of the surface
will collect less snow and dirt.
And offers a less comfortable rest place for birds and pigeons... my Z3801A
from time to time
http://www.wired.com/science/discoveries/news/2007/12/time_hackers
73 Alberto I2PHD
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H1�dn�*'u�ijw^v� j[ ��)���ln��q�j�!�
); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED] RETRY
Rob Kimberley wrote:
Ulrich,
Not sure what you did, but this is how I received your message below..
Rob Kimberley
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ulrich
); SAEximRunCond expanded to false
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Ulrich Bangert wrote:
Friends,
my Outlook holds an option under International options that reads
Codierung ausgehender Nachrichten automatisch wählen which means as
much as Coding of outgoing mails is choosen
Geodetics wrote:
Bob,
I'm afraid not. I'm no longer with Synergy and I don't think they will ever
do it. You should email: [EMAIL PROTECTED] and request the VP Command
Reference in case you don't have it. If you can explain your problems I
might still be able to help.
Randy
I
Randy Warner wrote:
Alberto,
Jason Rabel has this on his site. I sure am glad I took the time to do this
in 2000. Had to scan in 150 pages, run them through a TERRIBLE OCR program,
and spend endless hours watching TV and reformatting everything...
Randy
Randy,
thank you for
From the pictures on eBay, that board has a Trimble oven.
I have a cased Thunderbolt, bought a few years ago, and its OCXO is marked as
follows
Piezo (tm) Crystal Company, Carlisle, PA
Model 2900082 - 112
Freq. 10.000 MHz
S/N 1331
Does anybody know how the two OCXOs compare ? If the Trimble is
Bruce Lane wrote:
Actually, I've gotten quite lucky antenna and receiver-wise. I had the
unit open today, and
discovered that the receiver is a fairly late-model Magellan OEM type,
specifically an OEM 5000.
I've already dropped a note to Thales (who bought Magellan) to see if I
Didier Juges wrote:
--- snip ---
The question that comes up is: how do I know my GPSDSO is working and
how do I evaluate its stability?
--- snip ---
Couldn't you plot the EFC value vs time, and check whether it tends
asymptotically towards a (pseudo-)stable value ?
Knowing the Hz/V
Arnold Tibus wrote:
Unfortunately there is only the hex list of the pic code.
As I would like to experiment as well with this modification
and try to change some parameters to fit my LPRO
and some different OCXOs I own,
is there a way to get the commented source code of it?
I
Tom Van Baak wrote:
I'm curious about the 10 kHz signal. Can you send
me a pointer to it? Usually 1 Hz is good enough and
in practice most GPSDO use an averaging algorithm
that is more akin to 0.01 Hz to 0.001 Hz.
http://gpsdo.i2phd.com/
73 Alberto I2PHD
Arnold Tibus wrote:
Hello,
perhaps of general interest:
I found an intersting note via GPS-world, new for me,
but perhaps already well known,
telling that the Motorola M12+ is now replaced
by an improved version, the CW12 from Navsync.
(Designed as a functionally equivalent
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