In message aanlktinqevcwqcb2_grldttwazye-tp1ejjcnr7i3...@mail.gmail.com, paul
swed writes:
Thus making Europe a viable LORAN C frequency reference. Kind of amazing
actually considering it must be 3000 miles and only skywave.
9007M is probably not 3000 miles away from you, it's out in the
middle
Jochen,
With a Z3815A (Furuno receiver, E1938A oscillator) I noticed
the PPS to jump up and down by 2 ns pk-pk in average.
Were the PPS derived from the OCXO's 10 MHz output then 2 ns changes were
the result of 2% frequency changes which is FAR beyond the EFC capabilities
of any OCXO that I
http://www.wenzel.com/pdffiles1/Dividers/LNFDN.pdf
-RL
---
--
From: Tom Van Baak t...@leapsecond.com
Sent: Tuesday, December 21, 2010 10:03 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts]
Thank you Perrier, I could not say it any better. Right from my hart.
My frustration along with the points so eloquently covered is that among
some of the beat it to death responses there maybe be something worth wile
that I have deleted, because I do not open all postings any more.
Also some
This is the point I was trying, perhaps too subtly, to make in my recent
post in which I compared dialogue on this list with debate in the US
Senate. In some instances, the level of nit-picking has become extreme as
writers queue up, each to niggle at the post of the person just before
On 12/21/2010 10:11 PM, Bernd Neubig wrote:
Hi Rick,
I have a problem to imagine how you connect the LO and RF port of a mixer in
series and drive it (the IF port?) with a ... sine wave.
Can you send me a sketch of this arrangement please?
Tnx a lot!
Best regards
Bernd Neubig DK1AG
Good
Thats odd it says loop head Ireland not exactly the middle of the ocean. At
least thats the closest station I can find.
But that said I can get a frequency measurement but also at my very limit
from what I can tell.
I do want to look at the autron 2000 and SRS FS700. The 2000 lets you see
things
Hard to say if Faroe or Loop head is closer. Kindo of look about the same.
It would be nice if google maps had a way to plot distance.
On Wed, Dec 22, 2010 at 9:57 AM, paul swed paulsw...@gmail.com wrote:
Thats odd it says loop head Ireland not exactly the middle of the ocean. At
least thats
I will bet 1 or 2 of those are quite a costs.
On Wed, Dec 22, 2010 at 6:10 AM, Robert Lutwak rlut...@gmail.com wrote:
http://www.wenzel.com/pdffiles1/Dividers/LNFDN.pdf
-RL
---
--
From: Tom Van Baak t...@leapsecond.com
Sent: Tuesday,
When you hook up the SRS FS700 to the antenna you can monitor the front
panel
LORAN output with a spectrum analyzer and determine what has to be
notched out
either in a separate multicoupler with high and low tunable notches like
the Austron 2084
or the notch filters ( greater tuning range)
On the noise source, make a roughly 1 foor diameter shielded loop and use
it to DF the source, either with a portable receiver or preamp, BPF, and
'scope.
A shielded current probe, made of a long, skinny rectangle is useful for
looking for EMI currents on conductors.
When yuou find the source,
In message aanlktikg5jf=je2pcxyr2kfdp7yhzx_2fbukg70x1...@mail.gmail.com, paul
swed writes:
Hard to say if Faroe or Loop head is closer. Kindo of look about the same.
It would be nice if google maps had a way to plot distance.
Ohh, that's very easy to determine: Loop Head does not exist.
Due
Interesting.
I looked at google maps and it sure looks like a LORAN C antenna at
Loophead.
Further the Irish gov lighthouse commission has info on it. Cost to operate
it health risks...
So I think it was built. But not sure it matters or not. I get a signal from
that chain.
Just curious on the
Hello Paul,
go to: http://f6fvy.free.fr/qthLocator/ and play
Stan, W1LE
On 12/22/2010 10:00 AM, paul swed wrote:
Hard to say if Faroe or Loop head is closer. Kindo of look about the same.
It would be nice if google maps had a way to plot distance.
As to loop head a comment.Very very dumb. They could of had a great freq
reference. :-)
So is Faroe the closest to the US then?
Though I can just get the 6731 chain. It never really goes to settle like
90070 does.
On Wed, Dec 22, 2010 at 10:22 AM, Stan, W1LE stanw...@verizon.net wrote:
Hello
Somewhere else in England is Anthorn:
http://en.wikipedia.org/wiki/Anthorn_transmitting_station
Regards,
Antonio
CT1TE
Quoting Poul-Henning Kamp p...@phk.freebsd.dk:
In message
aanlktikg5jf=je2pcxyr2kfdp7yhzx_2fbukg70x1...@mail.gmail.com, paul
swed writes:
Hard to say if Faroe or Loop
Interesting all of the pictures are of the 19KC vlf antenna. No LORAN
antenna.
On Wed, Dec 22, 2010 at 10:35 AM, asma...@fc.up.pt wrote:
Somewhere else in England is Anthorn:
http://en.wikipedia.org/wiki/Anthorn_transmitting_station
Regards,
Antonio
CT1TE
Quoting Poul-Henning Kamp
Hi Stan Loop Head was not commissioned but the gear and the slot is being
used by as a slave eLoron station on the Lessay chain, from Anthorn on the
south bank of the Solway Forth in NW England.
Alan G3NYK
- Original Message -
From: Stan, W1LE stanw...@verizon.net
To: Discussion of
Oh yes there is !!
Alan G3NYK
- Original Message -
From: paul swed paulsw...@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Wednesday, December 22, 2010 3:58 PM
Subject: Re: [time-nuts] LORAN C is good again tonight 90070
Interesting all of
Sure, it is there. And you can see it, shinning and beautitful,
googling at:
54 54 41.149 N
03 16 42.587 W
Merry Xmas!
Antonio
CT1TE
Quoting Alan Melia alan.me...@btinternet.com:
Oh yes there is !!
Alan G3NYK
- Original Message -
From: paul swed paulsw...@gmail.com
To: Discussion of
Hi guys,
I live in New Mexico which means my LORAN receiver is pretty much a boat
anchor. This is what the thing looks like:
http://www.recycledgoods.com/products/Austron-2000C-Loran-C-Precision-Time-and-Frequency-Receiver.html
I'm offering it to anybody in the continental USA that can make use
In message aanlktikquulvwrggbug1-=bwcqrchknjrrzeg_8wh...@mail.gmail.com, Robe
rt Darlington writes:
Hi guys,
I live in New Mexico which means my LORAN receiver is pretty much a boat
anchor. This is what the thing looks like:
Ah, good point. I believe this is the case too.I have a taker now and
am waiting to hear back (I pointed this out to him).
-Bob
On Wed, Dec 22, 2010 at 9:44 AM, Poul-Henning Kamp p...@phk.freebsd.dkwrote:
In message aanlktikquulvwrggbug1-=bwcqrchknjrrzeg_8wh...@mail.gmail.com,
Robe
rt
Chris Albertson wrote:
I wrote some more ideas, I'm trying here to write what might later,
after some edits become a consensous document. that captures what
most people want. Edit away, maybe some of this will make it to the
web site...
++
Here is
Thats what I had seen. It looks like a loran tower while anthorn looks like
a 19 KC VLF antenna. Could I be picking up eloran. Here is the reason. I
lock on and sometime later I get a blink indicator.
Blinks are associated with a non compliant station or chain.
Just kind of wondering it would
Quite right its 3 digit thats why I built a mod for the 2000c using a SXb
micro single chip itty bitty 4 digit GRI generator. Total cost $5 in parts
and its not a kit. Just a chip dip switch and reset button.
A fellow in Italy is using it with a 2000c as am I.
Just hate to waste great gear because
The use of i...@c that I proposed was ONLY for module-to-module
communication. I wrote that none of the internal chips in a module
were to be exposed to the i2c bus. A module may very well have it's
own internal bus but that design detai needs to be hidden from the
rest of the system.
In an
The I2C bus is moderately well defined for the hardware interface, but hardly
at
all at the software level. This could be problematic for a system that supports
multiple hardware configurations. It also uses single ended signalling which
creates RF noise if not treated extremely carefully.
On Tue, Dec 21, 2010 at 11:50 AM, bownes bow...@gmail.com wrote:
That would all depend upon the interconnect strategy, which hasn't reached
consensus either.
Based on the early module list, a bus probably isn't necessary, and
individual ribbon cable and/or coax will do if speeds stay low.
Clarification of my previous posting:
The IF output of the ASK-1 should be pins 2 and 5,
not pins 4 and 5.
The LO input of the ASK-1 is pins 1 and 3.
The RF input of the ASK-1 is pins 4 and 6.
This is not obvious from the data sheet.
You can wire these two ports in series any
way you like,
What is the minimum size micro controller that can support CAN?
Every module, not matter how simple will need a uP that can suport
whatever bus we choose. It would be great if we could get away with
an 8-pin AVR tiny these sell for abut a buck each. I hate to use
up a minimum 1 square inch of
In message aanlktiklkd2z15kwbpewxtfgff=wqwsinv+to7oup...@mail.gmail.com, Chri
s Albertson writes:
Can CAN do this?
CANbus is mostly intented for hostile environments, and for anything
in-box less can do.
The problem with I2C is that it is not well suited for systems with
more than one master
All you 16500 logic analyzer users out there may or may not know that the
machine only works with Quantum Fireball disk drives with less than 2 gig
capacity. The analyzer firmware issues some undocumented IDE commands during
the boot sequence. You also may or may not know that those early
On Wed, Dec 22, 2010 at 2:41 PM, Poul-Henning Kamp p...@phk.freebsd.dk wrote:
In message aanlktiklkd2z15kwbpewxtfgff=wqwsinv+to7oup...@mail.gmail.com,
Chri
s Albertson writes:
Can CAN do this?
CANbus is mostly intented for hostile environments, and for anything
in-box less can do.
The
El 22/12/2010 23:11, Chris Albertson escribió:
Again I don't care much what is used but I think we need
1) Reasonable speed
2) ALL cards should be peers with no master
3) in-band addressing
4) Small minimum size for the uP and low Flash memory footprint
Can CAN do this? I'm worried about #2
In message aanlktinsvco_px6npttfvrtjafy-wctgtfkxe6kee...@mail.gmail.com, Chri
s Albertson writes:
How hard is it to do multi-master I2C.
About as hard as multi-master MODBUS
I still like I2C because it
can be doe on the smallest of uP with zero extra hardware. But
something else might be
I think I'm missing the big picture. What sort of things are people
interested in building? Will they all be a reasonable fit with a single Form
Factor, Bus, and whatever?
I've been thinking of something like a mother board with FPGA that would fit
in something like the Hammond boxes. The
Hi Bob,
My Name is Roy Conners,
Amateur Radio Call in K3TEN,
I Live at the NJ Shore, Cap May,
If your unit is Available, I could
Make a nice home in my Lab.
I will Pay shipping with your Instructions,
Thank you for you time,
Roy, K3TEN, 73
K3TEN Electronics
Radio Shack
I am currently reading Technical and Military Imperatives. A Radar History
of World War II by Louis Brown and think it is one of the most balanced
work on the subject around. It looks at the English, American, German and
Japaneese contribution. Is seems many groups were working on the same thing
I think you have the idea, especially the part about needing only a
very few wires between the daughter boards. But if that is the case
why have a motherboard and what do you do with an FPGA?
So my idea is that daughter cards each go in a small aluminum box of
their own and connect between
Hi Roy, the unit is already spoken for.
-Bob
On Wed, Dec 22, 2010 at 6:26 PM, Roy Conners k3...@verizon.net wrote:
Hi Bob,
My Name is Roy Conners,
Amateur Radio Call in K3TEN,
I Live at the NJ Shore, Cap May,
If your unit is Available, I could
Make a nice home in my Lab.
I will Pay
Ya know Roy,
I am very supicious of people with ultra clean desks. It just ain't right !
73BillWB6BNQ
Roy Conners wrote:
Hi Bob,
My Name is Roy Conners,
Amateur Radio Call in K3TEN,
I Live at the NJ Shore, Cap May,
If your unit is Available, I could
Make a nice home in my Lab.
On Wed, Dec 22, 2010 at 3:32 PM, Poul-Henning Kamp p...@phk.freebsd.dk wrote:
I used a shared opto-isolated async bus. You need two optocouplers
per microcontroller, and one place you power the shared bus, and
you're all set.
I have yet to see an microcontroller without an async port.
Thanks for geting back,
Have a very Merry Christmas and Happy New Year,
Roy, K3TEN,73
K3TEN Electronics
Radio Shack and Work Bench Check Our Web
Check Out Our Web at httP://www.k3ten.com
-Original Message-
From: time-nuts-boun...@febo.com
Perhaps I'm old school, but this sounds overly complex to me.
Probably the most important thing I learned in engineering school
(besides where the beer and amiable consorts were) was KISS. The more
complex, the less likely the project is to complete.
So I pose the question: Do we need a bus like
Comments inline. Hopefully I've edited this enough to prevent it being
overwhelming.
On Wed, Dec 22, 2010 at 7:40 PM, Hal Murray hmur...@megapathdsl.net wrote:
I think I'm missing the big picture. What sort of things are people
interested in building? Will they all be a reasonable fit with a
A modern counter is usually based around multichannel high resolution
time stamping.
To measure frequency one time stamps the output of a divider and
combines these results with the number of unknown frequency periods
between successive time stamps.
For example, one may divide down the
I don't see how a backplane bus with modules you plug in is simpler
then having only the modules with no backplane bus. The problem with
a hard backplane is that you have to know in advance what you are
going to plug into it. Another (seemingly unsolvable) problem is the
mechanical design. No
Time for me to jump in on the Form Factor...
How about something like this: http://www.blacet.com/
It's the smaller of the modular synths but Blacet can provide the racks and
a VERY quiet power supply (+/- 15V). The benefit to this is, the module can
be as wide as it needs to be... we can
Comms onthe text below: I would eliminate the moterboard completely
and incorporate it's function inside module that is built to the same form
factor as the modules that you have have plugged into the motherboard.
Big advantage is (1) mechanically much simpler and (2) yu can actually
change out
List,
The opinions given have been fascinating. However I see this discussion going
in two
directions. One is making a
counter. This is fine. Go for it if you have all the resources and
time it will require. The Achilles heel
that I see to this project is being able to duplicate the
El 23/12/2010 05:24, Bob Bownes escribió:
ARM or other general purpose CPU is interesting, but at what cost for
complexity and/or software development? It would require RAM, IO
support, and boot rom at the very least. Not insurmountable, but at a
cost to complexity.
If you are not planifying
In message aanlkti=jwicdwbfwizorpuf3vpj=dzxxveq7cj-ab...@mail.gmail.com, Chri
s Albertson writes:
Opto-isolater? Why not just use fiber cable between cards.
I have only ever seen point-to-point versions, I needed 7 cards
connected.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
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