On Thu, Sep 27, 2012 at 11:16:45AM -0700, J. Forster wrote:
> The bandwidth is secondary. The time-domain response of the filter is the
> issue.
Seems clear that you need a reasonably wide preselection filter
to avoid this problem, maybe as someone suggests several hundred or more
hz to re
On Fri, Sep 28, 2012 at 07:38:03AM +0200, b...@lysator.liu.se wrote:
> Dont you have GPS/Cs locked cell networks anymore in the US?
>
> http://www.endruntechnologies.com/cdma.htm
Björn,
Past experience with CDMA TOD references here is that they
fare much worse than WWVB TOD refer
Dont you have GPS/Cs locked cell networks anymore in the US?
http://www.endruntechnologies.com/cdma.htm
--
Björn
> In the real world, if GPS does not work, the WWVB change means you either
> have to buy the XW stuff or go do something else.
>
> YMMV
>
> -John
>
> =
>
>
>
>>
For David - re WWVB carrier recovery.
On squaring vs absolute values for carrier recovery. Never heard of
using absolute value.
As I said in my initial remarks - some perusal of the prior art is
helpful for this problem.
There are 70 years of literature on how to do this for any imaginable
On 09/28/2012 01:34 AM, Bob Camp wrote:
Hi
A PLL locks to phase. If the phase switches by 180 degrees, the phase tracking
switches signs. There's no way to track that. You either need to double the
frequency (and thus eliminate the modulation) or demodulate the signal and lock
to the result.
The required height to get a usable view of the sky sometimes is just not
practical.
In reading XW's stuff, it looks to me like they are essentially and
intentionally repurposing WWVB from a standard of time interval, to a
distribution vehicle for TOD.
YMMV,
-John
> Haha, the
I have been thinking about this problem on and off over the last
couple of days.
Would it be better to take the absolute value rather than squaring the
signal?
I might try some tricky but impractical analog sampling and/or
synchronous demodulation recovery method but the Costas loop looks
awfully
Except, in many places, flagpoles are not permitted.
-John
==
> Flagpoles need caps, right? A GPS antenna would be just perfect. And a
> fiberglass flagpole could hide a significant HF vertical!
>
>
>
>
> On 9/27/2012 10:24 PM, Randy D. Hunt wrote:
>>>
>>
>> Put up a flagpole.
>>
>>
Comming soon to a voting booth near you.
YMMV,
-John
==
> And don't get me started on "Smart Growth", the International Council for
> Local Environmental Initiatives and Agenda 21.
>
> All designed to move us into dense urban living conditions with fixed mass
> transit and odious
On 9/27/2012 7:27 PM, Peter Gottlieb wrote:
Flagpoles need caps, right? A GPS antenna would be just perfect. And
a fiberglass flagpole could hide a significant HF vertical!
On 9/27/2012 10:24 PM, Randy D. Hunt wrote:
Put up a flagpole.
Randy, KI6WAS
___
On Thu, Sep 27, 2012 at 7:15 PM, Peter Gottlieb wrote:
> Not quite sure about the analog to health care, but certainly a
> transmission being public domain doesn't mean much if the only possible way
> to use it is proprietary. Sounds like something Microsoft would strive for.
>
I think Apple a
And don't get me started on "Smart Growth", the International Council for
Local Environmental Initiatives and Agenda 21.
All designed to move us into dense urban living conditions with fixed mass
transit and odious rules as to what kind of light bulb we can use, what kind
of toilet we can install,
Flagpoles need caps, right? A GPS antenna would be just perfect. And a
fiberglass flagpole could hide a significant HF vertical!
On 9/27/2012 10:24 PM, Randy D. Hunt wrote:
Put up a flagpole.
Randy, KI6WAS
___
_
On 9/27/2012 4:20 PM, Bob Camp wrote:
Hi
At least in my back yard, a 6' tall tripod would be very noticeable from a
number of directions. There are many others in similar situations. If I were to
interpret the restrictions literally as written, an antenna that was inside the
house, but visibl
Not quite sure about the analog to health care, but certainly a transmission
being public domain doesn't mean much if the only possible way to use it is
proprietary. Sounds like something Microsoft would strive for.
On 9/27/2012 9:57 PM, WB6BNQ wrote:
The transmitted format on WWVB (and for
The transmitted format on WWVB (and for that matter on the WWV HF
stations) is owned by the government and thus the "PEOPLE."
As stated to me, John Lowe (WWVB Broadcast Manager) claims he is the
person who has designed and is implementing this new broadcast format.
Because he is a paid employee of
Absolutely!
Often as not, a bunch of new rules and regulations are "bundled" with some
popular measure. The popular measure gets the press, the rest of the
package gets ignored.
That happens at all levels of government. Purposely so.
-John
===
> HI
>
>
. and if you believe that t
Bob,
Thanks for the nice, concise, summary of the screwing the new WWVB format
will inflict on the timing community, especially because LORAN-C is dead.
The only "benefit" to the NIST/XW scheme I can see is creating a monopoly
for Xtendwave in precision TOD marketplace for those not relying on GP
HI
…. and if you believe that these sort of restrictions are passed one at a time
locally.. not so much. The "easy way" is for your local government to simply
adopt an "up to date" package of rules. Rarely do any of those voting
understand what in the package. Rarely does the vote get anything
On Thu, Sep 27, 2012 at 3:10 PM, Charles P. Steinmetz
wrote:
> Chris wrote:
>
>> After some measuring my general run of thumb is "Anything you
>> leave plugged in and running 24x7 will cost you triple digits of
>> dollars (at least) over a year
>
>
> Well, that's a lot of "anything."
Maybe I shou
If you are under the impression living in an older, built up area will be
a defense against those with a Martha Stewart fetish, you are wrong.
-John
>
>
> Well, that's what I love about the SF bay area- lots of old neighborhoods
> that didn't have all these silly restrictions
Title restrictions, once put into place, can be extremely tricky to remove.
On 9/27/2012 7:36 PM, Bob Camp wrote:
Hi
The gotcha isn't the neighbors (who you can negotiate with) it's what ever
entity enforces the title restrictions. With the recent dip in sales, that may
be the original devel
Hi
Ok, to *try* to bring this back together.
There is indeed a valid Time Nuts need for something other than GPS. In reality
there are many reasons. One that has not been mentioned is to check on the
validity of your long term GPS time estimate Small errors that accumulate can
be a really nas
Until I move into the house I'm getting I'm in a rental condo where absolutely
no antennas are permitted. It's a building and I'm on the 4th floor so have
done things like ran a very thin wire out one window to a far one, a wire with a
weight nearly to the ground, a rather long wire (#26 strand
On 27 Sep, 2012, at 15:40 , Jim Lux wrote:
> On 9/27/12 2:58 PM, Bob Camp wrote:
>> Hi
>>
>> It would be interesting to hear what the patent lawyers on the list think
>> about the patents. Given a quick read, they appear to cover any use of the
>> specific transmitted format for receiving time
Haven't had a single problem with my GPS antennas at my home and all of my
sites for nearly 8 years now. They work well up inside the building by the
wooden roof ridge even with 10-20 inches of snow on top in the winter time.
G
___
time-nuts mailing l
Well, that's what I love about the SF bay area- lots of old neighborhoods that
didn't have all these silly restrictions in place when they were built. There
are the "usual" CC&Rs, like I can raise chickens, but not cows, but it doesn't
mandate what three colors you can paint your house, or th
Hi
….. and as long as C&R's are not something the FCC is going to play with -- you
are stuck.
Bob
On Sep 27, 2012, at 8:09 PM, David wrote:
> Presumably such a strategy would be applied against a HOA that has
> power over the restrictions.
>
> I have not been following this subject for seve
Presumably such a strategy would be applied against a HOA that has
power over the restrictions.
I have not been following this subject for several years but
apparently the FCC has released the report authorized by congress in
2012 and again found no need to take action:
http://transition.fcc.gov/
On 9/27/12 4:34 PM, Bob Camp wrote:
Hi
A PLL locks to phase. If the phase switches by 180 degrees, the phase tracking
switches signs. There's no way to track that. You either need to double the
frequency (and thus eliminate the modulation) or demodulate the signal and lock
to the result. If y
You cannot put a narrow filter before the squarer for reasons previously
cited. In a low S/N area, squaring just makes matters worse wrt dynamic
range and clipping.
-John
==
> Hi
>
> A PLL locks to phase. If the phase switches by 180 degrees, the phase
> tracking switches signs. There'
Hi
The gotcha isn't the neighbors (who you can negotiate with) it's what ever
entity enforces the title restrictions. With the recent dip in sales, that may
be the original developer, still there a decade later ….
Bob
On Sep 27, 2012, at 7:30 PM, David wrote:
> On Thu, 27 Sep 2012 18:59:48 -
Hi
A PLL locks to phase. If the phase switches by 180 degrees, the phase tracking
switches signs. There's no way to track that. You either need to double the
frequency (and thus eliminate the modulation) or demodulate the signal and lock
to the result. If you simply put up a real narrow filter
In the real world, if GPS does not work, the WWVB change means you either
have to buy the XW stuff or go do something else.
YMMV
-John
=
> On 9/26/12 7:11 PM, J. Forster wrote:
>> But if someone here designed and built a $100 receiver and offered it to
>> the group, that could
On Thu, 27 Sep 2012 18:59:48 -0400, Jeff Stevens
wrote:
>On Thu, Sep 27, 2012 at 1:27 PM, Hal Murray wrote:
>> What do hams do in that environment?
>
>Hams either avoid HOAs and deed restricted property or they live with
>the restrictions by placing their antennas in attics and other
>inconspicu
Hi
At least in my back yard, a 6' tall tripod would be very noticeable from a
number of directions. There are many others in similar situations. If I were to
interpret the restrictions literally as written, an antenna that was inside the
house, but visible through an open window is also a viola
Various comments -
Hal mentioned SNR for the scheme I suggested. A PLL can be a coherent
demodulator of arbitrary
bandwidth. Thus the PLL at the output of the doubler can have a small
bandwidth since at that point
there is no PSK, it having been removed by the doubler. So given a
stable VCXO y
On 9/27/2012 2:06 PM, Bob Camp wrote:
Hi
Hit send to soon.
The title stuff comes from the developer not the builder. All the developers
seem to subscribe to the same newsletter that comes up with a standard set
of "stuff" to add to the title.
Bob
-Original Message-
From: time-nuts-bou
On Thu, Sep 27, 2012 at 1:27 PM, Hal Murray wrote:
> What do hams do in that environment?
Hams either avoid HOAs and deed restricted property or they live with
the restrictions by placing their antennas in attics and other
inconspicuous locations. There have been attempts by hams to get the
FCC
On 9/27/12 3:10 PM, Charles P. Steinmetz wrote:
Chris wrote:
In another post you mentioned $0.21/kWH (you must be in California?), so
adjust all of these by a factor of 2.625 for your location -- but I
think the service rates in most of the US are closer to ours than to
yours).
A lot of ar
Most recent bill in MA:
Supply is 6.72 cents/kWh and delivery is 6.60 cents/kWn for a total of 13.32
cents/kWh. This is much less than I was paying in NY where it was hovering
around 30 cents/kWh (I remember 32 one summer month).
Peter
On 9/27/2012 6:10 PM, Charles P. Steinmetz wrote:
Chr
On 9/26/12 7:11 PM, J. Forster wrote:
But if someone here designed and built a $100 receiver and offered it to
the group, that could well violate some of their IP.
As to building a home brew receiver and certifying a onsie so your lab's
cal is traceable, I'd certainly not trust a cal done that w
HI
At least as written, the restrictions allow the microwave dish but do prohibit
the UHF/VHF antenna.
Bob
On Sep 27, 2012, at 6:42 PM, Jim Lux wrote:
> On 9/27/12 10:02 AM, Bob Camp wrote:
>> Hi
>>
>> Right here in PA for one. You essentially can not buy a new house without
>> there being
Thanks for the tips. I am using latest verison 3.10. Also sorry that I did
not describe the problem clearly. I see the seconds ticking by nicely but
then every 20-30 seconds, the 'seconds' number freezes for a few seconds and
then the display races through and catches up. Sounds like a backgroun
On 9/27/12 10:02 AM, Bob Camp wrote:
Hi
Right here in PA for one. You essentially can not buy a new house without
there being various conditions written into the title. One universal one is
"no antennas". The only exception is for one 19" sat dish for TV, since
that's a federal mandate.
Actua
On 9/27/12 2:58 PM, Bob Camp wrote:
Hi
It would be interesting to hear what the patent lawyers on the list think about
the patents. Given a quick read, they appear to cover any use of the specific
transmitted format for receiving time information.
IANAL, but..
reading Claim 1..
a key aspects
On 9/27/12 7:23 AM, J. Forster wrote:
Jim,
What you are suggesting is essentially a spread spectrum system where the
chip pattern is time varient.
IMO, this is an incredible kludge. And, there is no gurantee that the
algorythm for generating the chip pattern will not change down the road.
I
Chris wrote:
After some measuring my general run of thumb is "Anything you
leave plugged in and running 24x7 will cost you triple digits of
dollars (at least) over a year
Well, that's a lot of "anything." There are 8760 hours in a year, so
a 1 kW load will consume 8760 kWH per year. We pay
HI
Wasn't the original question about the transmitted bandwidth? If not, then I
answered the wrong question.
I am indeed very interested in what the transmitted bandwidth actually is.
Bob
On Sep 27, 2012, at 2:48 PM, J. Forster wrote:
> In this area, you cannot get the BW down enough for a u
Hi
It would be interesting to hear what the patent lawyers on the list think about
the patents. Given a quick read, they appear to cover any use of the specific
transmitted format for receiving time information.
Bob
On Sep 27, 2012, at 2:54 PM, Scott Newell wrote:
> Looks like one has issued
Hi
Hit send to soon.
The title stuff comes from the developer not the builder. All the developers
seem to subscribe to the same newsletter that comes up with a standard set
of "stuff" to add to the title.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...
Hi
I *wish* it was that simple. Around here the HOA isn't the issue. The crud
is put in the title by the builder..
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of d.sei...@comcast.net
Sent: Thursday, September 27, 2012 4:34 PM
To:
Earth to Dave:
Sometimes laws and regulations change years after you buy a piece of
property or do something perfectly legal.
Nobody is safe whenever (Congress, Agency, State Legislature, Town
Council, governing body, or whatever) is in session.
YMMV,
-John
===
>
>
> These are amoun
These are amoung other reasons why I will never buy a house in a development or
with a HOA.
-Dave
- Original Message -
From: "Bob Camp"
To: j...@quikus.com, "Discussion of precise time and frequency measurement"
Sent: Thursday, September 27, 2012 11:36:23 AM
Subject: Re:
johncr...@aol.com said:
> So it should be possible to implement a receiver without infringing any
> patents and without reams of signal processing code.
How well would your scheme work with poor signal/noise?
Some of us consider "reams of signal processing code" to be as much fun as
wiring up
Useful
Thanks. What I do not see coming out is anything to help create a local
corrected 60 Khz sig. It seems to only be about time.
On Thu, Sep 27, 2012 at 2:54 PM, Scott Newell wrote:
> Looks like one has issued (8,270,465). Application 20120082008 appears to
> be relevant as well.
>
> http://
To Paul re my receiver thoughts.
You are absolutely correct in some regards and for some
implementations.
The limiter must have very high dynamic range and must not convert
changes in input level to
changes in transmission phase; i.e. No AM to PM conversions. Thus my
specific suggestion of
Looks like one has issued (8,270,465). Application 20120082008
appears to be relevant as well.
http://www.google.com/patents/US8270465
http://www.google.com/patents/US20120082008
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In this area, you cannot get the BW down enough for a usable signal
without killing the time response to the BPSK transitions.
YMMV,
-John
> Hi
>
> I suspect the bandwidth is > 1 Hz, since they want to get the data bits to
> reliably flip within a second. I'm sure the bandwidt
It is not a matter of skin depth. Skin depth relates to a dissipative
process like EM waves traveling into/through a resistive medium. Soil
and rock are not dissipative to heat in this way. There is a poor
impedance match between the air and the soil but once into the ground,
through soil and
Hi
I suspect the bandwidth is > 1 Hz, since they want to get the data bits to
reliably flip within a second. I'm sure the bandwidth is limited for a
number of reasons.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent
Hi
and indeed many of the "likely hiding places" are also on the list of
things you are not supposed to do.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of J. Forster
Sent: Thursday, September 27, 2012 2:20 PM
To: Discussion o
Been tried. Doewn't work. Among other things, if you multiply by 2 and
then divide by two, you can have extra flips or missed flips. A Miller
Divider has the same issue.
..
Interesting that you should bring up TV.
A REQUIREMENT of the conversion from B&W to color was compatability with
t
Vent pipes are not usually 20-30 feet tall.
-John
=
> Which for all intents and purposes means "nothing that looks like an
> antenna
> to John Q. Public". What if your GPS antenna looked like a vent pipe? or a
> Bird House? It may be difficult to hide a decent HF antenna, But, a 1.5
The bandwidth is secondary. The time-domain response of the filter is the
issue.
-John
=
>
> j...@quikus.com said:
>> The AM just makes the situation in low S/N areas worse. The BPSK wipes
>> out
>> the possibility of any very narrow band prefiltering, because of filter
>> time
>> r
That type of behavior is almost always related to the driver for the USB
converter.--I am using a dedicated fast pro9cessor laptop but
Lady heather seems to
slo9w down and every 20-30 seconds I can see it race through the seconds to
catch up.
John
Like your thoughts and have exactly tried all that you say over the last 6
months. The div / 2 is a big issue because of the fades and noise. It
really does not work. Now if you are in the 1000uv contour it most likely
mostly will.
By the way limiting was a nightmare.
Regards
Paul.
On Thu, Se
less then 10 hz and more like 1
On Thu, Sep 27, 2012 at 1:15 PM, Hal Murray wrote:
>
> j...@quikus.com said:
> > The AM just makes the situation in low S/N areas worse. The BPSK wipes
> out
> > the possibility of any very narrow band prefiltering, because of filter
> time
> > response.
>
> What
Under other issues, I have one where GPS could not be used. It was at a UHF
TV station where the third harmonic fell right in the L1 band. A 220,000
watt UHF transmitter driving a gain antenna for 5 MW EIRP will always
produce some third harmonic near the antenna. There was no access to GPS
wit
Hello All -
I am new to this forum but have read it for a couple of years. The
present fulminations on the WWVB format change should be reconsidered
in the light of prior art. As an old RfFengineer I do not see any issue
with the format and the business about patents is not really applicable
as th
Which for all intents and purposes means "nothing that looks like an antenna
to John Q. Public". What if your GPS antenna looked like a vent pipe? or a
Bird House? It may be difficult to hide a decent HF antenna, But, a 1.5 GHz
antenna can be virtually invisible.
Dale NV8U
-Original Messag
li...@rtty.us said:
> Right here in PA for one. You essentially can not buy a new house without
> there being various conditions written into the title. One universal one is
> "no antennas". The only exception is for one 19" sat dish for TV, since
> that's a federal mandate.
Interesting. Thanks
j...@quikus.com said:
> The AM just makes the situation in low S/N areas worse. The BPSK wipes out
> the possibility of any very narrow band prefiltering, because of filter time
> response.
What is the bandwidth of the transmitted signal?
--
These are my opinions. I hate spam.
__
Hi Chris when the British Post Office (later BT) ran radio stations, the
station standard was usually in a hole 30 feet deep. Crystals were made in
our own "Factory", a section of the Research department, so the crystals
would have been cut to suit UK conditions. Maintaining systems were usually
Hi
Right here in PA for one. You essentially can not buy a new house without
there being various conditions written into the title. One universal one is
"no antennas". The only exception is for one 19" sat dish for TV, since
that's a federal mandate.
Bob
-Original Message-
From: time-nu
In my business we term it "analysis paralysis."
Greg
With sufficient thrust, pigs fly just fine...
On Thu, 27 Sep 2012 07:29:46 -0700, Chuck Forsberg WA7KGX N2469R
wrote:
I cannot think of a time-nuts WWVB reference requirement
that cannot be better satisfied with a GPSDO.
Will NIST publis
It is Kill-A-Watt if you go looking for one.
http://www.p3international.com/products/special/P4400/P4400-CE.html
Highly recommended product.
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On Thu, Sep 27, 2012 at 9:07 AM, brent evers wrote:
> If you get one with three sata ports (more than two usually comes with
> four though), plug in three drives - one for the OS and applications,
> and two data configured to run as a mirrored raid array - makes a
> cheap and easy file server.. I
On 9/27/2012 4:07 AM, Jerry wrote:
I am using a dedicated fast pro9cessor laptop but Lady heather seems to
slo9w down and every 20-30 seconds I can see it race through the seconds to
catch up.
There are some system and version suggestions posted in other replies.
Another thing that happens is
On Thu, Sep 27, 2012 at 8:52 AM, gary wrote:
> I use a dual core atom as a server. Be sure to read the user reviews on
> Newegg regarding memory. If you try to stuff your Atom to the full 4gbytes,
> only certain sodimms work. You can use the smallest SSDs around for this
> purpose. I built mine wi
If you get one with three sata ports (more than two usually comes with
four though), plug in three drives - one for the OS and applications,
and two data configured to run as a mirrored raid array - makes a
cheap and easy file server.. I haven't done this but plan to (maybe
I'll do that this weeke
I use a dual core atom as a server. Be sure to read the user reviews on
Newegg regarding memory. If you try to stuff your Atom to the full
4gbytes, only certain sodimms work. You can use the smallest SSDs around
for this purpose. I built mine with an 80gBbyte intel.
I use win 7 pro 64 bit for
On Wed, Sep 26, 2012 at 11:05 PM, Hal Murray wrote:
>
>> As you go deeper you get a delayed history of the surface temperature.
>
> Right. Skin depth.
>
>
>> A good oven runs rings around deep earth stability.
>
> But a hole in the ground doesn't take any power.
>
That was my point. At some de
atom based mini-ITX boards are available from ~60GBP (low-end, ~1.2GHz) to
about ~140GBP (dual-core + loads of I/O). Not looked recently as I've got all I
need (at the moment). Situation your side of the pond should be similar.
Not expensive.
regards,
Paul
G8GJA
-Original Message-
I run an XP VM in either VirtualBox (under linux) or Parallels (on my mac)
to do the same thing. Works like a charm.
Bob
On Thu, Sep 27, 2012 at 11:00 AM, paul swed wrote:
> My I like your approach.
> Now I have to go see what all of this might cost.
> On vmware are you running esxi??
> Suspec
On Thu, Sep 27, 2012 at 8:00 AM, paul swed wrote:
> My I like your approach.
> Now I have to go see what all of this might cost.
> On vmware are you running esxi??
> Suspect the atoms are costly
No. It cheap. An Intel motherboard with an Atom CPU soldered down to
it (Atom does not use a socket)
My I like your approach.
Now I have to go see what all of this might cost.
On vmware are you running esxi??
Suspect the atoms are costly
Regards
Paul
WB8TSL
On Thu, Sep 27, 2012 at 10:58 AM, Chris Albertson wrote:
> I have an Intel Atom powered box that runs Linux. These Atom CPUs use
> so litt
Anyone seen or own a Seiko Astron wrist watch or an other brand ? Any opinion
on these new generation of wrist watches?
Cheers
--
Raj, VU2ZAP
Bangalore, India.
___
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I have an Intel Atom powered box that runs Linux. These Atom CPUs use
so little power they don't put fans on the CPU heat sinks. I run
VMware on Linux and then Windows XP inside the virtual PC. LH runs on
Windows in the virtual machine. I have removed the monitor, keyboard
and mouse. The entir
While there could have been a few things to make the WWVB transmissions
easier to recover with low S/N, keeping them compatible with the
"legacy" time-only receivers was somewhat of a hindrance.
Unlike the DCF77 signal - which has a digital phase modulation that does
NOT really lend itself to
Zoning, Legal?
Where?
Brent
On Thu, Sep 27, 2012 at 10:41 AM, J. Forster wrote:
> Because:
>
> LORAN-C is gone.
>
> Not all can use GPS because of siting, horizon, zoning, legal, and other
> issues. Not everyone can erect antenna towers.
>
> There is nothing else, except perhaps WWV or CHU on H
Because:
LORAN-C is gone.
Not all can use GPS because of siting, horizon, zoning, legal, and other
issues. Not everyone can erect antenna towers.
There is nothing else, except perhaps WWV or CHU on HF.
-John
==
> I cannot think of a time-nuts WWVB reference requirement
> tha
I cannot think of a time-nuts WWVB reference requirement
that cannot be better satisfied with a GPSDO.
Will NIST publish a public domain reference circuit?
That would allay patent concerns.
--
Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for E
Mike some of the early laptops from this vintage switch the backlight off if
closed but stay running, I used this for some 24/7 logging.you may even
be able to get an old junk screen
Alan
G3NYK
- Original Message -
From: "Michael Baker"
To:
Sent: Thursday, September 27, 2012 2:
Jim,
What you are suggesting is essentially a spread spectrum system where the
chip pattern is time varient.
IMO, this is an incredible kludge. And, there is no gurantee that the
algorythm for generating the chip pattern will not change down the road.
YMMV,
-John
==
> On 9/2
Probably so.
Which leaves two alternatives:
Build a receiver anyway. XW will likely wait unitl it starts making
money... then sue. A typical strategy.
or
Try to get a license and pay through the nose.
Once again, we see the government picking winners and losers. How has that
worked out for th
The xtal causes close to zero carrier for a period of time on each phase
shift.
Regards
Paul
WB8TSL
On Thu, Sep 27, 2012 at 10:07 AM, J. Forster wrote:
> The AM just makes the situation in low S/N areas worse. The BPSK wipes out
> the possibility of any very narrow band prefiltering, because of
Why not DCF. NIH. Just joking.
Good comments that are detailed. The phase does not change every second
though it can.
There are many times when the phase sits for 3 or more seconds. The PLL TC
is about 2-3 seconds on the older receivers so they tend to jump around
never really locking or only for a
The AM just makes the situation in low S/N areas worse. The BPSK wipes out
the possibility of any very narrow band prefiltering, because of filter
time response.
I suspect, although have not tested, that active antennas with either
mechanical or crystal filters in their preamps will be rendered us
I also use a vintage IBM laptop to running Lady Heather, It's 128MB ram and
350MHz CPU, works very well.
Hui
-
At 2012-09-27 21:39:10,"Michael Baker" wrote:
>Hi, All--
>
>I have dedicated an ancient Windows 95 laptop to sitting
>on a shelf in my workshop running Lady Heather
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