Thanks all for the replies to my initial query as to whether anyone had any
firsthand experience with this device. The replies have been helpful.
It is also clear that what some see as an apple, others see as an orange. A
simple common truth perhaps which becomes very obvious when comparing the
Good day all,
On another list to which I subscribe, there has been chatter about the Ublox
neo-7M GPS receiver. It seems that the device's configurable timepulse output
is configurable from 0.25hz to 10 MHz as well as it's duty cycle and can also
be set to be one condition when the GPS is not
oscillator loop
locked with sufficient time constant (10s)..
Sent From iPhone
On Aug 19, 2014, at 9:20, Collins, Graham coll...@navcanada.ca wrote:
Good day all,
On another list to which I subscribe, there has been chatter about the Ublox
neo-7M GPS receiver. It seems that the device's
This is an interesting use of GPS, I had never considered the Aurora or solar
storm angle before.
However, I am aware of the use of ionospheric scintillation and TEC
measurements for ionospheric research and also for the study and detection of
earthquakes.
Canadian High Arctic Ionospheric
I can't speak in absolute terms with respect to current stability, however,
they have always been very stable being locked to rubidium or cesium standards.
Another interesting twist with the VLF transmitters are the TACAMO
transmissions by flying aircraft. They transmit on a couple of different
I am sure there are others on list who follow Elektor Magazine and even perhaps
their forums but there are likely many that do not.
I stumbled across this interesting frequency standard project and thought
others might also be interested:
Quite true.
One of my other interests is the ionosphere and propagation. This of course has
an effect on GPS and other time related receiving systems. In support of my
monitoring and trying to measure such things I monitor on a more or less
continuous basis CHU on 7850 KHz. This in itself may
Indeed, very interesting. I stumbled across this the other day. After a
preliminary read of one of their documents:
A World-Wide Low-Cost Community-Based Time-of-Arrival Lightning Detection and
Lightning Location Network
Found here: http://www.blitzortung.org/Webpages/index.php?lang=enpage=3
There is a popular DIY VNA designed by N2PK, boards are available from a fellow
in Ontario Canada, a quick google search should find the information for you.
Also, Sam Wettlerlin has published much on his web site with respect to
Scotty's Spectrum Analyzer project, VNA, return loss bridges,
While only related to time nuttery in the sense of the hp 54600a being an
instrument (oscilloscope) which we nuts might use make some meaningful
measurements, I am hoping that members of this list vast knowledge of many such
instruments may be able to help or at least point me in the right
Thank you Thomas,
I have that document but it wasn't of much help. I spent much time over the
weekend reading through the various hp documents for this scope and interfaces
but it did not shed any light on the subject.
Cheers, Graham
-Original Message-
From:
often works when 8N1 is specified.
On Apr 22, 2014, at 10:34, Collins, Graham coll...@navcanada.ca wrote:
Thank you Thomas,
I have that document but it wasn't of much help. I spent much time over the
weekend reading through the various hp documents for this scope and
interfaces
David,
Thanks for posting and for all else that you post.
You have done much with the Raspberry PI.
How you done anything with or have compared the PI to the Beaglebone Black?
Cheers, Graham ve3gtc
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf
Of Chris Albertson
Sent: October-22-13 11:36 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Making a Raspberry Pi NTP server without soldering
On Tue, Oct 22, 2013 at 7:13 AM, Collins, Graham coll...@navcanada.cawrote
Indeed, the inexpensive DVB-T dongles are showing up in many places including
as David noted, decoding GPS.
For some details:
This gets you to the start of their web site:
http://gnss-sdr.org/
This is an interesting document they have published on their project:
and frequency measurement
Subject: Re: [time-nuts] A man with two clocks...
Is your code posted anywhere? I've been meaning to do roughly the same.
-- Phil
On Oct 3, 2013 12:07 PM, Collins, Graham coll...@navcanada.ca wrote:
David,
Your raspberry-pi NTP clock is very cool.
I have put together
David,
Your raspberry-pi NTP clock is very cool.
I have put together something along the same line but is in reality just a
network connected NTP disciplined clock display using an Arduino and a typical
16x2 LCD housed in a small project box.
The Arduino has a network shield and get's it
One of my favourite cases for housing projects is to use an HP 37203 HPIB
extender. Remove the PC Board and you are left with a power supply that is
suitable for many things (or remove if not up the job), plus there is a BNC
connector on the back side plus a spot where the GPIB connector poked
I stumbled across a web site which provides details on the use of GPS for
ionospeheric research.
http://chain.physics.unb.ca/chain/
under data products there is a link to raw GPS data which may or may not be
suitable. You need to register in order to have access however.
There are some
Good day all,
Lately I have been contemplating a variety of methods to take a high stability
10 MHz reference multiply it up to a suitable frequency for use a the reference
clock for a DDS, for example 10 MHz to 80 MHz or 120 MHz (or whatever).
On method is to use simple diode based doublers
driving it somewhat less important.
Bob
On Aug 30, 2013, at 12:56 PM, Collins, Graham coll...@navcanada.ca wrote:
Good day all,
Lately I have been contemplating a variety of methods to take a high
stability 10 MHz reference multiply it up to a suitable frequency for use a
the reference
The time nut related comics that were posted the other day where good. I made a
note to start keeping track of those and similar ones.
And in today's funnies I found this one:
http://www.gocomics.com/herman/2013/08/21
Cheers, Graham ve3gtc
___
Good day all,
I have yet another small oscillator for which I need the pin out. This time the
oscillator is marked Ovenaire Oak Frequency Control and the Model OSC 91-22C
(or maybe G) and the label says it is a Precision Crystal Oscillator so nothing
quite as interesting as a OCXO or even
371Y383 oscillator
Make a phone call to the NH plant. Ask a product specialist for details.
May get shuffled to the PA plant. Persisit.
Stan, W1LE Cape Cod
On 12-Aug-13 8:53 AM, Collins, Graham wrote:
Good day all,
I recently purchased a VECTRON 10Mhz oscillator like the one
. :-) Remember when
you tended to think about the call across the country.
Regards
Paul.
WB8TSL
On Tue, Aug 13, 2013 at 7:12 AM, Collins, Graham coll...@navcanada.cawrote:
Thanks Stan, it may just come to that.
Cheers, Graham
-Original Message-
From: time-nuts-boun...@febo.com
Good day all,
I recently purchased a VECTRON 10Mhz oscillator like the one in the this eBay
listing 38133695
Very typical of some of VECTRON older offerings but I have been unable to find
much if any information on this oscillator. I haven't yet emailed VECTRON but
thought I might first
This may have been discussed previously and I just missed it.
In any case, I just stumbled across this interesting project and thought others
on the list might find this time clock radio beacon driven by a pendulum to be
of interest:
http://ok0epb.nagano.cz/
cheers, Graham ve3gtc
On the subject of Loran C, I have a couple of Loran C antenna preamps kicking
around that I have not up to this point done anything with. This talk of Loran
C being back on has me thinking of the getting something set up to try and
receive these new signals.
What I have is one each of II
.
As fars as actual docs. Boy thats awful rare.
Regards
Paul
On Fri, Mar 2, 2012 at 9:50 AM, Collins, Graham coll...@navcanada.cawrote:
On the subject of Loran C, I have a couple of Loran C antenna preamps
kicking around that I have not up to this point done anything with. This
talk of Loran C
Sent: March 2, 2012 10:23
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] LORAN C update
My LORAN antenna pre is fed with 8V down the coax.
On Fri, Mar 2, 2012 at 4:05 PM, Collins, Graham coll...@navcanada.cawrote:
Paul,
That would be my guess too
Thanks Greg.
That sounds very reasonable is where my current thinking is.
Failing any conflicing information I may find, I will start my testint with 5V
Cheers, Graham ve3gtc
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Greg
It might even be simpler than that.
Same pictures, same location, same business; different ebay stores for each
sales rep - paid on commission or by the piece.
Perhaps the next time I buy something from overseas I will ask.
Sometimes there is a bit of struggle with language but for the most
Mike,
Pretty cool site. Thanks for posting. I hadn't stumbled across that site before.
Cheers, Graham ve3gtc
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Michael Costolo
Sent: February 22, 2012 06:23
To: time-nuts@febo.com
Which ones?
Some time ago I was setting up to turn a Metric and discovered that there where
a Japanese Metric standard for the thread as well as a German Metric standard
both of which where slightly different from the standard Metric threadd that
was I wanted to cut.
Cheers, Graham ve3gtc
A Student of Time and it's measure?
Cheers, Graham
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of paul swed
Sent: December 15, 2011 10:36
To: shali...@gmail.com; Discussion of precise time and frequency measurement
Subject: Re:
Something to start (or finish) your day
http://www.gocomics.com/nonsequitur/2011/12/04
cheers, Graham
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Perhaps not in the same league or with the same gee-whiz appeal as a SDR GPS
receiver but how about your own DIY GPS receiver:
http://dangerousprototypes.com/2011/11/24/homemade-gps-receiver/
and the authors web page:
http://www.holmea.demon.co.uk/GPS/Main.htm
cheers, Graham ve3gtc
As David implies, there is no problem sending to the UK.
I had a look at listing and immediately recognized the seller. He won't send
anything to Canada nor I think Alaska or Hawaii.
For some reason he has an issue with anything that appears to involve a bit of
extra work. It's his choice and
Good morning David (and all),
Unfortunately this type of behavior is becoming more common and I read
about such happenings far too frequently. Usually starts from someone
posting a wanted ad someplace.
You are correct, from you description this sounds like a scam plain and
simple. Asking for
Now that is very high in the cool factor!
This has been an interesting thread and got me to thinking about
building something similar for myself.
A quick search for Arduino and LED or LCD Clock returned many hits and
lots of interesting ideas for rolling my own.
For those not acquainted
Something to be careful with when buying SMA connectors is to ensure you
get the same polarity. You will find some listed as just SMA and
others as RP-SMA - RP for reverse polarity. The RP variety have the male
/ female pins of the connectors reversed from the standard SMA
connectors.
WD40 (according to the MSDS) is principally Stodard Solvent and light petroleum
oil.
Stodard solvent can be thought of as pretty much as and having similar
properties to kerosene. The light petroleum oil can be thought of and having
simliar properties to something like 3 in 1 oil. I can't
And don't forget the AtMega88 - not as much memory but you can still
pack a lot into it. I think the original Arduino was based on the 88 and
the bootloader is still available meaning you can build an Arduino
compatible board using the 88, you may still be able to by the 88 chip
with the
I have one of these same exact modules which I purchased to use as a
TXCO that I could then lock to an external standard in an HP Agilent
5314A Universal counter. My project hasn't moved beyond a very
preliminary planning stage at the moment pending some more information
on the device.
I haven't
Thanks all for their comments on this topic.
Over the weekend I spent much time messing about with the NTP stuff and
the NMEAGps application.
NMEAGps does just as described and does make a nice IRIG-B signal
through a PC's sound card. Unfortunately you cannot specifiy which of
several
On another list to which I subscribe, the question was asked about the
suitability of recording WWV 2.5mhz audio as one track when recording
off the air signals of interest as a time reference.
The person who asked the question didn't really state his intentions but
they seem very similar to my
and frequency measurement
Subject: Re: [time-nuts] Time Code generator
Collins, Graham wrote:
On another list to which I subscribe, the question was asked about the
suitability of recording WWV 2.5mhz audio as one track when recording
off the air signals of interest as a time reference
generator
At 07:28 AM 12/3/2010, Collins, Graham wrote...
Is there an opensource/freeware PC app that will generate an
appropriate
time code signal that can be recorded on one track of an audio
recorder
(either PC based i.e. Audacity or standalone) that will also decode
via
soundcard or other input
IRIG clocks, which only decode an IRIG signal.
I'd like to get these units to people who can use them, so shipping
is going to be the main cost. Don't know what it takes to ship to
Canada.
Bill Hawkins
b...@iaxs.net
-Original Message-
From: Collins, Graham
Sent: Friday, December 03, 2010
A PIC or Arduino widget would be perfect (I mess around with both). A
quick Google search for Arduino and IRIG-B didn't seem to return much of
interest but I will have another look and this time also a search on PIC
as well.
Cheers, Graham
-Original Message-
From:
And, it is getting more expensive to buy from the States and have
shipped internationally.
I saw the other day a reference to a new $9 charge that will be added to
item being shipped internationally from the US that weigh more than 16oz
(454grams). The charge to help offset the cost of new
.
Dave
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]
On
Behalf Of Collins, Graham
Sent: 02 December 2010 13:02
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Cheap distribution amplifier
And, it is getting
Other countries are also implementing restrictions on what comes in, hence the
concern about what is being sent out.
Cheers, Graham
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Chris Albertson
Sent: December 2, 2010 11:12
To:
I found today's November 17, 2010 Dilbert rather funny.
http://www.dilbert.com/
cheers, Graham
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