eturn common mode noise directly back to earth instead of
through the cable).
Didier KO4BB
On Fri, May 18, 2018, 8:10 AM Clint Jay wrote:
> Interested to know how much noise would be from USB signalling and how much
> is " machine noise" from the PC as my understanding of USB
Tom,
In my TB monitor kit, I used your Julian date routines, adapted to the 8051
(no variable greater than 32 bits since my compiler does not support them
either) to apply the GPS offset correction.
It was very helpful.
Didier KO4BB
On Wed, Mar 28, 2018, 7:13 AM Tom Van Baak wrote:
> Hi M
I like the sound card idea. However I believe it's much better to use the
two channels. At least under Windows, it is much easier to track the
relative phase of the two channels of one sound card than the absolute
phase of one channel compared to the system clock.
I have written an audio VNA in Vis
It depends on the quantity they buy. I just looked for X7R 0.1uF in 0805 at
Digikey and the automotive grade (10%, -55 to +125) is cheaper than the non
automotive grade with worse tolerance and more limited temperature range.
Next time you buy it may be reversed...
On Feb 25, 2018 1:51 PM, "Gerhar
Got the answer in the previous email :)
On Mon, Feb 19, 2018 at 5:28 PM Didier Juges wrote:
> What do you mean by “Adafruit” pinout?
>
> On Fri, Feb 16, 2018 at 11:50 AM Mark Sims wrote:
>
>> No, the Tbolt does not have a separate receiver board... plus its' GPS is
>
What do you mean by “Adafruit” pinout?
On Fri, Feb 16, 2018 at 11:50 AM Mark Sims wrote:
> No, the Tbolt does not have a separate receiver board... plus its' GPS is
> rather special... the RF chain is locked to the OCXO so it does not produce
> any sawtooth error.
>
> The Lucent KS firmware expe
I am so glad that my laziness has a new name that does not sound nearly as
bad as the original one...
I will be sure to remember that next time I do my "self appraisal".
Merry Christmas everyone (I know I am early but my clock is fast...)
Didier KO4BB
On Thu, Dec 21, 2017 at 2:0
You are always welcome to upload time-nuts related material to my manual
site www.ko4bb.com
Didier KO4BB
On Dec 14, 2017 1:03 AM, "Ulf Kylenfall via time-nuts"
wrote:
>
> Tried to mail the pictures to Magnus. The mail bounced back.
> Ole Petter Ronningen was kind to a
Where I work, we had a high power system tripping and occasionally blowing
up at 7:00 AM. It turned out that it was when the power company switched
big capacitors across the lines as businesses got started to keep the power
factor within their target range. It was creating just the kind of
transien
It makes me feel better (not good, just better) to know it's not just me...
On Sep 29, 2017 7:19 AM, "Bob kb8tq" wrote:
> Hi
>
>
> > On Sep 28, 2017, at 6:59 PM, Mark Sims wrote:
> >
> > I suspect that it is either temperature related (the funkiness starts
> around when the temperature reaches
need one or more files that are in the Upload
folder and that I have not moved yet, fire up your ftp client (info is on
the Manuals page).
Thank you for your patience and patronage.
Didier KO4BB
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To
"If the Thunderbolt loses satellites, does it still put out a 10 Mhz
signal?"
Yes of course. When that happens, the Thunderbolt is said to be in holdover.
On Aug 3, 2017 9:29 PM, "Chris Waldrup" wrote:
> Hi,
>
> I just noticed the laptop that is always connected to my Thunderbolt had a
> yellow
" having around 20 dB of gain at the antenna greatly decreases the effect
of feed line loss on noise figure."
And that would be consistent with usage for a timing receiver which is
expected to have a well exposed antenna and a significant line length, as
opposed to navigation receivers where the a
l 31, 2017, at 3:32 PM, Didier Juges wrote:
> >
> > The Thunderbolt is well known for not having the best sensitivity among
> GPS
> > receivers. It seems that timing receivers in general, particularly those
> of
> > the same generation as the Thunderbolt are not
The Thunderbolt is well known for not having the best sensitivity among GPS
receivers. It seems that timing receivers in general, particularly those of
the same generation as the Thunderbolt are not as sensitive as navigation
(possibly newer) GPS receivers. It may be because they are expected to ru
That device also has analog circuitry for the oscillator itself and the
temperature sensor and the temperature compensation.
I believe I have read an app note some time ago, it may have been from
Maxim describing a kind of ring oscillator being used as a temperature
sensor which drew much less powe
Since the Thunderbolt is hard coded to detect a particular week to
determine if it should add 1024 to the week number, I would guess that each
product has a magic date based on the anticipated release date of the
product (week 936 for the Thunderbolt), and it will work for 1024 weeks
from that date
That is very good information. I will add your email to the 5370 page on my
web site.
Didier KO4BB
On Jul 18, 2017 4:02 AM, "Thomas Allgeier" wrote:
> Hello All Again,
>
>
>
> I’ve got my 5370B going now and in the process made a “discovery” which I
> thought mig
I have been forced to use micro-D by a customer on a military power supply,
not even space rated, it was well over $100 each in 50 piece quantity (I
think it was a 25 pin).
However, unless they are mistreated (which is easy for the reason you
listed), they seem reliable. I do not believe we have r
If that is not time-nutty, I do not know what will :)
On Jun 20, 2017 7:04 AM, "jimlux" wrote:
>
> for geodetic measurements, they drill a hole down to bedrock, and run a
> pipe down to anchor the antenna to the bedrock.
>
> "All holes shall be drilled straight enough so that PVC casing can be
>
The difficulty with hydrogen is to keep it where you want it. It does not
take very much for it to leak out (or in, as the case may be)
On Jun 8, 2017 4:58 PM, "Alan Melia" wrote:
> Hi Bob, it also depends on what you allow to leak into the vacuum.
> Hydrogen is a pretty effective remover of hea
near that and I gave up on that chip.
Didier KO4BB
On Jun 6, 2017 4:17 PM, "Attila Kinali" wrote:
On Tue, 6 Jun 2017 16:37:27 -0400
Bob kb8tq wrote:
> Often when you dig into the details of MCU ADC’s they have a little note
“optimized for audio” or
> “not recommended for contro
One issue with power factor corrected power supplies is that in the short
term (as a minimum, at the line frequency), they do behave like resistors
(current goes up when voltage goes up) but as they have a slow voltage
regulation loop to provide regulated output, they do behave like constant
power
Yes, I noticed that before.
I have a number of tools that don't like running off a Dropbox folder,
including several software development tools for starter. Too many files
opened at the same time.
Don't assume that because it looks like a normal folder, it works like one,
even though for many thing
Well worth mentioning that you have found a reputable vendor. I may give
them a try.
A while back, I bought a dozen 18650 inexpensive(<$5 each) cells from 3
vendors picked at semi-random on eBay (4 from each) for evaluation and I
tested each one of them with a data logger.
The best one had about h
I use Copper Connection, a $50 package (PWB layout only) that works very
well for me.
There is a free eval version that has some limitations.
Didier KO4BB
On Jan 19, 2017 11:01 PM, "Richard (Rick) Karlquist"
wrote:
> Off topic, but probably a lot of disgrunted Eagle users on thi
b.com/tps/plottemp.php?file=D8B04CF343D6.csv&length=day
This is my wife's green house, with temperature in C and F and humidity.
Let me know if you are interested.
Didier KO4BB
On January 4, 2017 1:32:24 PM CST, Dan Kemppainen
wrote:
>Hi All,
>
>Just ordered a few of the
Hopefully that will be tomorrow.
Didier KO4BB
On December 27, 2016 2:37:23 PM CST, GandalfG8--- via time-nuts
wrote:
>I have just uploaded this firmware to Didier's (KO4BB) manuals site so
>it
>should be available for download in the near future.
>
>Regar
TCXO usually refers to Temperature Compensated Crystal Oscillator (no heater),
as opposed to Oven Controlled Crystal Oscillator (OCXO) which has an oven.
I would not expect a TCXO to become warm or draw more current at power up. An
OCXO would.
Didier KO4BB
On December 21, 2016 1:29:00 PM CST
There is a free tool (Robot Room Copper Connection) that will take EcpressPCB
files and spit Gerber files. It is actually a full fledged PCB design software
that seems to be significantly more capable than the ExpressPCB software even
though I have not used it as such.
Alternately you can send
Re: Manual uploads to my site:
I have limited internet access for another week. Uploads will be processed the
week of December 5th.
Didier KO4BB
On November 19, 2016 7:05:52 PM GMT+01:00, Mark Sims wrote:
>There was a copy uploaded to EEVBLOG. I uploaded it and another one
>that
I am out of town but will be back over the week end. All uploads will be sorted
by then.
Didier KO4BB
On October 11, 2016 1:54:06 PM EDT, Francesco Messineo
wrote:
>1818-2295A dump has been uploaded to ko4bb site, probably there's need
>to be moved in the right place before it&
throw away $40 and getting junk that at best will not be very
useful and at worse will burn your house.
Batteries are a tough business, ask Samsung...
Didier KO4BB
On October 10, 2016 1:13:45 PM EDT, "Dr. David Kirkby (Kirkby Microwave Ltd)"
wrote:
>On 10 October 2016 at 0
.
Didier
On August 17, 2016 5:25:39 PM CDT, Magnus Danielson
wrote:
>Hi,
>
>I agree.
>
>There is however a subtle detail, how they leak out over time.
>
>At one time we had to lock an 155,52 MHz oscillator up to 8 kHz, this
>for a 2,48832 Gb/s link, which needs to pass t
r the Olympics but I remember it as if it was
yesterday...
(I used to travel a lot)
Didier KO4BB
On Mon, Aug 8, 2016 at 6:28 AM, Morris Odell
wrote:
> Hi all,
>
> There was a thread about this a few weeks ago and I mentioned that I was
> working on one with a "Stephen Hawking&qu
In fact, you do not want to "update the crystal one million times/second".
The whole point of a GPSDO is to combine the excellent short term stability
of the crystal with the excellent long term stability of the GPS signal. If
you update the crystal in real time from the GPS data, you do not need t
If you have to regulate over ambient temperature as high as 120C, you need
an oven that regulates at a higher temperature, maybe 125 at least or 130C.
You will have a lot of issues with long term reliability with something
that operates 24/7 above 120C.
Have you looked at a Peltier junction that wo
I did not know Futurlec accepted ExpressPCB files, so I checked.
The equivalent to ExpressPCB mini board pro service (2 sided, solder mask
and silk screen, 3 pieces, same size) is $86 + shipping and one week to
shipment. ExpressPCB is $75 in 3-4 days in your mailbox including FedEx
(they do offer
from emailing them the Gerber's.
Didier KO4BB
On August 12, 2016 9:22:42 AM CDT, wb6bnq wrote:
>Hi Didier,
>
>I use ExpressPCB as well, but I send the ExpressPCB file to a company
>called Futurlec
>( http://www.futurlec.com/PCBService.shtml ). They have reasonable
>
I just installed CopperConnection and it opens the ExpressPCB layouts just fine
:)
Thanks for the tip, I will give it a go.
Didier KO4BB
On August 12, 2016 9:22:42 AM CDT, wb6bnq wrote:
>Hi Didier,
>
>I use ExpressPCB as well, but I send the ExpressPCB file to a company
>cal
be proficient with Eagle, but Express PCB works for me.
Didier KO4BB
On August 11, 2016 10:45:45 PM CDT, Chris Albertson
wrote:
>This seems totally backwards. Typically a Gerber file is something
>you make yourself on your computer then send it in for a prototype.
>Seems odd to buy t
Good point! It is only an issue when you try to calibrate/correlate to the
physical length.
Didier
On August 11, 2016 1:56:09 PM CDT, Bob Stewart wrote:
>Why is velocity factor an issue? Aren't we only interested in the
>electrical time from one end of the coax to the
Thank you Tom and yes, the spell checker tends to be overbearing at times
Didier
On August 11, 2016 3:19:04 PM CDT, Tom Van Baak wrote:
>FYI: In Didier's post below, the correct URL is:
>
>http://www.ko4bb.com/getsimple/index.php?id=coax-cable-impedance-matching
>
>I'
5 ohm mismatch.
The biggest variable will be the velocity factor.
Didier KO4BB
On August 8, 2016 2:18:02 PM CDT, Bob Albert via time-nuts
wrote:
>I host a group called something like HF Antennas. There I posted a
>link to an article on how to measure coaxial cable. The easiest way
, then if you are happy with those, buy the Gerbers
for that design.
Didier KO4BB
On Tue, Aug 9, 2016 at 3:06 PM, Brooke Clarke wrote:
> Hi:
>
> I've had good luck using any of the the ExpressPCB services that include
> solder mask with surface mount parts where the pitch is 0.05&qu
pport!
Didier KO4BB
www.ko4bb.com
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and follow the instructions there.
Have you looked at the blitzortung.org system?
There may be some ideas to glean from that
On July 28, 2016 6:12:54 PM CDT, Jerome Blaha
wrote:
>Hi Guys,
>
>This is a little outside of time-nuts scope, but not by much. I'm
>interested in finding the time between two rising edges above a set
>th
I had planned to clean up at
some point. I was just not planning to do that NOW!!!
The problem has been temporarily fixed, I have freed 10GB and hopefully I
will have made more space (or bought more space...) over the week end.
Thank you for your patience and your support.
Didier KO4BB
machine to unzip it instead of just moving/renaming
via ftp.
Didier KO4BB
On Sat, Apr 16, 2016 at 5:36 AM, Tom Van Baak wrote:
> Adrian,
>
> Thanks for doing that. And you're now a member of the hp Smartclock pForth
> appreciation club ;-)
>
> You can send the ROM to me or Mag
Here is what my tool looks like:
www.eds-fl.com/misc/graph/index.php
You need to download a data file first, I added a link to download a small file
9kB.
Again, this is not an ADEV tool, the file format is binary (came out of an old
DOS tool that could not plot to save its life...) but it's a
I have done something similar at work (not for adev, for plots of corona test
results on HV transformers) but since most engineers here are Linux/UNIX
challenged, I put the Perl scripts on a Linux box and let people send their
data through a web page via cgi, which returns the plot as graphic.
E
Hopefully, they will have installed the U.FL connector on the WiFi board so
that you can install the antenna outside the enclosure with a short coax cable.
Besides, it's low power ;)
Didier KO4BB
On March 15, 2016 2:10:21 PM CDT, Poul-Henning Kamp wrote:
>
>In messag
Finally, by popular demand, another batch of Thunderbolt Monitors are coming...
Check http://www.ko4bb.com/getsimple/index.php?id=the-thunderbolt-monitor-kit
Didier KO4BB
--
Sent from my Moto-X wireless tracker while I do other things.
___
time
should be available in a couple of months.
Didier KO4BB
On January 10, 2016 4:06:51 PM CST, Ben Hall wrote:
>On 1/10/2016 1:06 PM, Mark Sims wrote:
>>> Porting the GUI client to anything else would be a fair bit of
>>> work, though.
>> Not all that much work. There a
Wow. So elegantly simple explanation, thanks John!
On November 27, 2015 2:54:51 PM CST, John Miles wrote:
>So, here's how I finally grokked this stuff. c, the speed of light in
>a vacuum, is often spoken of as a "speed limit" that nothing can ever
>exceed. That's a bad way to put it, and people
(art major with CSS
experience...)
Here is a demo:
http://www.ko4bb.com/AjaxDemo/x-web.html
The back end of that runs on php, but it could be python just the same.
Obviously failing the "pretty" test :)
Didier KO4BB
On July 4, 2015 8:13:06 AM CDT, Jim Lux wrote:
>I've
, but the
handwriting was on the wall a long time ago and it is unfortunate.
Didier KO4BB
PS: I intent to keep my site up as long as I can afford it, and if someone
comes up with a dumpster's worth of scanned manuals, I will find the disk space
for it, but unfortunately, I can't afford
The quarantine is officially over (for this week :)
Thanks for the uploads
Didier KO4BB
PS: I am now trying to move the manuals and equipment specific docs out of the
GPS Timing folder into the manufacturer's folders. I realize it may be less
convenient for those who are only interest
Is the new RPi2 any different in that regard?
On April 7, 2015 8:17:12 AM CDT, Daniel Mendes wrote:
>
>Internally the rPI is a ver awkward beast: the CPU is connected to a
>GPU, and the GPU is connected to the GPIOs... so lots of jitter and
>latency.
>
>It was designed to be a video decoder... t
Not at home right now but if you send me an email with what needs to be done,
I'll be glad to do it.
Didier KO4BB
On March 12, 2015 6:54:06 PM CDT, Dan Rae wrote:
>On 3/12/2015 1:47 PM, George Atkinson wrote:
>> Done.
>>
>But you might want to get Didier to correct th
a few nS edges while driving significant capacitance
at several hundred kHz. They can be very useful for "low" frequency clock
drivers.
Didier KO4BB
On March 7, 2015 10:10:45 AM CST, Graham / KE9H wrote:
>The question is not the frequency, but the edge rate. For a 1 PPS
>sig
I have added this info to the wiki:
http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:fe5680a_pin-out
Thanks
Didier KO4BB
On Sat, Feb 21, 2015 at 2:25 PM, Bob Camp wrote:
> Hi
>
> Just so it goes into the archives. Here’s the pinout for the FE-5680B with
> a 15 pin con
). It would not work at 10MHz (because of propagation delay and
self heating), but at lower frequencies, they work very well.
The UCC27531 has lower propagation time and comes in an SOT-23 package, the
others are available in DIP-8 and SO-8.
Didier KO4BB
On Thu, Mar 5, 2015 at 3:59 PM, Martyn Smith
ebay) and you are in business.
Total cost about the same as a dedicated GPS receiver with antenna and NMEA
output. Choose your poison :)
Didier KO4BB
On March 3, 2015 10:23:56 PM CST, Chris Albertson
wrote:
>Is the code in C? If so I bet it would run on some development board.
>No
&g
e code at the moment, but I have released the source
code for the kit.
Didier KO4BB
On March 2, 2015 5:06:21 PM CST, Tim wrote:
>On 3/03/2015 4:33 AM, Didier Juges wrote:
>> Tim,
>>
>> NMEA is normally used for navigation. It would seem unlikely that
>anyone would want to
Tim,
NMEA is normally used for navigation. It would seem unlikely that anyone would
want to use a Thunderbolt for navigation. Can you elaborate on what you are
trying yo do?
Didier KO4BB
On February 25, 2015 10:11:08 PM CST, Tim wrote:
>Hi all,
>
>Is there a way to get NMEA instea
e document.
I am trying to come up with a scheme that will create a permanent link. Bear
with me a little longer...
Didier KO4BB
On January 28, 2015 7:41:59 AM CST, Gerhard Hoffmann wrote:
>Am 28.01.2015 um 00:23 schrieb Magnus Danielson:
>>
>> It locks it up with a PLL. See p
ven itself and from that optimize the PID terms in real time as a
function of the load. This was in the early 80's. It was pretty hot stuff
then, even for an oven :)
Didier KO4BB
On Sun, Jan 25, 2015 at 8:12 PM, Jim Lux wrote:
> On 1/25/15 1:30 PM, WarrenS via time-nuts wrote:
>
ging bridge and sawtooth
correction is not required.
I am not aware of any other GPSDO implementing that scheme, which is very
elegant in its simplicity.
Didier KO4BB
On Sat, Jan 24, 2015 at 8:18 AM, Bob Camp wrote:
> Hi
>
> Maybe a bit more information, much of it applies to all GPSDO
target value. The D
term slows it down just enough and minimizes that overshoot while maintaining a
high gain (low steady state error) and a fast response.
Didier KO4BB
On January 24, 2015 8:05:38 PM CST, Bob Camp wrote:
>Hi
>
>A classic control loop in it’s simplest form has only
Re: "Note that this is not a GPS problem, nor a Trimble problem. It's just
a problem with user written software."
I agree with Mark's comment. His software makes no attempt to "interpret"
or "correct" the information put out by the Thunderbolt, it simply reports
it. My Thunderbolt Monitor does the
The MAX5318 is available at Digikey. Not cheap, and not sure if it is
electrically compatible, but it has good specs (not an audio DAC).
And it is in a TSOP package, so can be soldered on a small adapter board
Didier KO4BB
On Fri, Jan 16, 2015 at 1:49 PM, Jerry Pixton wrote:
> Hello
I have a page that illustrates how you can use a delay line and a mixer to
separately obtain AM and PM
http://www.ko4bb.com/Timing/Phase_Detector
Didier KO4BB
On January 14, 2015 1:19:11 PM CST, Mike Feher wrote:
>At those low levels, how does one differentiate between phase or AM
>
within uS or
better and this is a system that deliberately introduces an error a million
times bigger. I am just surprised Time-Nuts would not go nuts about it :)
Didier KO4BB
On January 11, 2015 8:31:12 AM CST, Tom Van Baak wrote:
>> Keep in mind that this system drives you to having
Yes, you can get an Arduino R3 on eBay for <$4 with shipping...
The GPIB connector will cost you more!
Didier KO4BB
On January 12, 2015 8:45:12 AM CST, paul swed wrote:
>That certainly is a hack. But its something I have often thought about
>and
>never did. He is right its
cast on a wooden leg.
Didier KO4BB
On Fri, Jan 9, 2015 at 6:57 PM, Henry Hallam wrote:
> Such slewing solutions are OK for Google. They wouldn't work well for
> one of the systems I work with, which uses system time to calculate
> the position of a LEO satellite for purpose of point
To add a small dose of additional complexity, Visual Basic 6.0 (and I suspect
other dev tools of that generation) only support COM ports up to 16. Not as bad
as 4, but still a problem on occasion.
Didier KO4BB
On January 4, 2015 12:03:05 PM CST, Bob Camp wrote:
>Hi
>
>Ok, off in
e the performance of a GPSDRb is mostly
driven by the GPS and PLL anyhow.
Didier KO4BB
On Tue, Dec 30, 2014 at 7:14 AM, Didier Juges wrote:
>
> You can get a working LPRO for $150 with very reasonable shipping.
> To me, that's a better deal unless you absolutely need the thrill of
force it to run anyhow) The 3rd wire is pretty
small (because it carries negligible current) and it is sometimes the first
one to break. You are then left with a perfectly usable 19.5V power supply
that cannot power a Dell laptop but that is fine for many GPSDO and Rb
oscillators :)
Didier KO4BB
On
always work.
Didier KO4BB
On Mon, Dec 22, 2014 at 8:39 AM, Bob Camp wrote:
> Hi
>
> At the moment Comcast and ko4bb.com don’t seem to like each other. I
> can’t refer directly to the schematic or the page.
>
> What you *should* have (assuming 10 MHz inputs for clarity):
>
>
would then get double isolation.
Didier KO4BB
On Sun, Dec 21, 2014 at 2:52 AM, Charles Steinmetz
wrote:
>
> Mike wrote:
>
> From a Time-Nut perspective, isn't phase/frequency of the (nominal) 60 Hz
>> all we'd be interested in? Phase is best measured at a zero c
Apologies to Jean Louis, I obviously missed that part... :)
On Wed, Dec 10, 2014 at 3:47 PM, Jean-Louis Oneto wrote:
>
> I just uploaded the file to K04BB. com.
> Best regards,
> Jean-Louis
>
>
> On 10/12/2014 19:10, Charles Steinmetz wrote:
>
>> Jeaen-Luis wrote:
>>
>> The size of the file is a
x27;s normal
folder) but the file would not show up in search, while being in the normal
folder.
This problem has now been fixed.
Let me know if you come across any new issue.
Thank you
Didier KO4BB
www.ko4bb.com/manuals
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:)
I observe that the LT1034 has two outputs, the high quality 2.5V and a
lower quality 7V.
http://www.linear.com/parametric/Shunt_Voltage_References
Didier KO4BB
On Tue, Dec 9, 2014 at 5:51 PM, Richard (Rick) Karlquist <
rich...@karlquist.com> wrote:
> On 12/9/2014 1:30 PM,
bipolar transistor yields a
simple and high performing regulator (at least much higher than most 3 terminal
series regulators) particularly if you use the Linear Tech equivalent part
(forgot the part number at the moment, but look for shunt regulators)
Didier KO4BB
On December 8, 2014 4:59:24 PM CST
Thanks Magnus, and apologies to all for the "not-so-smooth" conversion to
the new site. I still have a few random bugs that I am trying to squash and
I appreciate your patience...
On the other hand, performance of the new server seems to be good.
Didier KO4BB
On Sat, Dec 6, 2014
bout the document as suggested and click
"Upload".
Didier KO4BB
On Sat, Dec 6, 2014 at 5:44 AM, Magnus Danielson wrote:
> Charles,
>
> On 12/06/2014 02:30 AM, Charles Steinmetz wrote:
>
>>
>> Do open up and take a look. Do take photos. Do share. :)
&g
"Just remove the TCXO the 10811 just plugs in"
Note that there are many different versions of the 10811. I am familiar
with at least two incompatible mechanical configurations: one is
connectorized and the other is not.
Didier KO4BB
On Thu, Nov 27, 2014 at 5:43 PM, Scott McGrath wrot
Another reason is reproducibility. If you or someone else wants to reproduce
your design, using a well defined and available commercial part makes it much
easier to achieve the same performance, particularly for RF components.
Didier KO4BB
On November 27, 2014 12:41:34 PM CST, "Richard
any exotic ocx or dll, just the
standard stuff that is installed with VB 6.0.
Didier KO4BB
On Thu, Nov 27, 2014 at 9:56 AM, Didier Juges wrote:
> The Visual Basic NMEA Parser (with source code) has been posted:
> http://www.ko4bb.com/NMEAParser
>
> It is work in progress, is not a
created myself.
I welcome any constructive comment(s) via direct email. If you make useful
addition or bug fix, I would like to get your updates so that everyone can
benefit.
Happy Thanksgiving to all.
Didier KO4BB
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Said,
Your drawing looks better than those by Bob Pease, and he was never
embarrassed by his :)
Thank you for your extensive contributions to time nuts
Didier KO4BB
On Tue, Nov 25, 2014 at 7:28 PM, S. Jackson via time-nuts <
time-nuts@febo.com> wrote:
> Guys,
>
> I never e
ou started.
Didier KO4BB
www.ko4bb.com
On November 25, 2014 1:42:42 PM CST, Jim Miller wrote:
>I have one of the LTE-Lite 20Mhz units and plan to use it as a
>frequency
>reference for my ham radio gear. My planned setup is as follows:
>
>I'm putting it in the recommended Hammond enc
, you can use Digi XBee modules that work like wireless RS232
isolators. I use the XSC Pro 900 MHz for a number of projects, including data
loggers that are out of WiFi range. You can get well over a mile in open space
with those. They are limited to 19200 bauds at the most.
Didier KO4BB
On
resistors. That
means that the 3 V microcontroller was powered from 5V. I am actually amazed
that they worked at all, let alone worked for a while.
It is a shame that fluke.l saved on the cost of 3 diodes that way. The 1N4148
is $.02 at Mouser in 25 pieces lots.
Didier KO4BB
On November 18, 2014
Charles,
You can always upload time-related material to my Manuals page:
www.ko4bb.com/manuals
Didier KO4BB
On November 3, 2014 2:43:47 PM CST, Charles Steinmetz
wrote:
>Tom wrote:
>
>>As I understand it, his project is to use the high frequency output
>>of a ublox NEO-
single point at the
zero crossing.
I wish my signal processing were better than they are and that I had some time
to evaluate that.
Didier KO4BB
On October 22, 2014 1:09:11 PM CDT, WarrenS via time-nuts
wrote:
>
>
>The recent discussions about the simple digital mixer got me thinki
Check lightningmaps.org, mentioned on this list before for lightning location
via TOA using STMicro Cortex -M4 devices.
Didier KO4BB
On October 20, 2014 8:39:16 PM CDT, Joseph Gray wrote:
>What does everyone think of this GPS module for ntp use? According to
>the
>specsheet, it use
:)
Didier KO4BB
On October 11, 2014 3:19:52 PM CDT, Tom Wimmenhove
wrote:
>It's a chip (PSD813F) which has 1MBit flash, 16Kbit SRAM and 256Kbit
>EEPROM. It's old school with parallel data/address bus and all that :)
>It
>does have JTAG.
>
>Regards,
> Tom
>
that was the
reason for that observation?
Didier KO4BB
On October 8, 2014 2:07:31 PM CDT, cdel...@juno.com wrote:
>Hi,
>
>I came across this phenomena when transmitting with two 5KW
>transmitters
>via separate parabolic antennas to a satellite.
>
>If the phase of the TXs was
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