I've been away from the group for a while but I rejoined with a couple of
questions. Hope they haven't been beaten to death already.
I want to set up a FMT on an old PC using GPS. Its for ham mesh network and it
will not be connected to the internet. I found a couple of sites and they seem
to b
On 2/15/12 7:16 AM, Peter Vince wrote:
See:<
http://www.nytimes.com/2012/02/15/business/media/fcc-bars-airwave-use-for-broadband-plan.html?_r=1&scp=3&sq=lightsquared&st=cse
Err.. not necessarily. As one of the commentators in the business press
said yesterday (paraphrasing).. Harbinger need
Good news for a change!
Rob K
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Peter Vince
Sent: 15 February 2012 15:16
To: fmt-n...@yahoogroups.com
Cc: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] [FMT
See: <
http://www.nytimes.com/2012/02/15/business/media/fcc-bars-airwave-use-for-broadband-plan.html?_r=1&scp=3&sq=lightsquared&st=cse
>
On 15 February 2012 14:34, David McClain wrote:
>
>
> Yeaaa! LightSquared GPS-band broadband is gone. Big article on the front
> page of the NYTimes Business
From: "Didier Juges" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] FMT on October 13
Date: Wed, 26 Sep 2007 05:57:14 -0500
Message-ID: <[EMAIL PROTECTED]>
Didier,
> I just wanted to point out that with reciprocal counters, you can get
> resolution much better than
alone propagation, fading and multipath.
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Tom Van Baak
> Sent: Wednesday, September 26, 2007 1:45 AM
> To: Discussion of precise time and frequency measurement
> Subject:
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From: "Tom Van Baak" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] FMT on October 13
Date: Tue, 25 Sep 2007 23:45:12 -0700
Message-ID: <[EMAIL PROTECTED]>
> ); SAEximRunCond expanded to false
>
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>> Did mounting it on a block of foam help?
> That is a rather bad solution. You want much softer material to react
> to quicker things, such as silicon rubber. Also, that would only be a
> 12 dB/Oct solution. You would really
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> I guess it depends on signal to noise ratio. With reciprocal counters, you
> only need one period to measure as acurately as you need, but to have good
> acuracy, you need very good S/N, as there is no filtering possible.
>
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Hal Murray <[EMAIL PROTECTED]> wrote:
> > Make sure not to get near any of the equipment. Free-running
> > oscillators are sensitive to vibration or shock. You've probably heard
> > the story of my best Sulzer oscillator making
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Did anyone mention sorbothane ?
Magnus Danielson <[EMAIL PROTECTED]> wrote: From: Hal Murray
Subject: Re: [time-nuts] FMT on October 13
Date: Tue, 25 Sep 2007 14:23:21 -0700
Message-ID: <[EMAIL
); SAEximRunCond expanded to false
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From: Hal Murray <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] FMT on October 13
Date: Tue, 25 Sep 2007 14:23:21 -0700
Message-ID: <[EMAIL PROTECTED]>
> ); SAEximRunCond expanded to false
> Errors-To: [EMAI
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> Make sure not to get near any of the equipment. Free-running
> oscillators are sensitive to vibration or shock. You've probably heard
> the story of my best Sulzer oscillator making small phase or jumps
> which I eventually c
); SAEximRunCond expanded to false
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>> While were at it, in the case mentioned above I'm a curious
>> about their FMT frequency standard -- if it's really accurate
>> to parts in 10^12, as they imply, over 10 minutes. I could
>> believe this if it were an Rb or Cs
); SAEximRunCond expanded to false
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Didier Juges said the following on 09/24/2007 09:40 PM:
> ); SAEximRunCond expanded to false
> Errors-To: [EMAIL PROTECTED] RETRY
>
> I guess it depends on signal to noise ratio. With reciprocal counters, you
> only need one pe
); SAEximRunCond expanded to false
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Tom Van Baak said the following on 09/24/2007 08:57 PM:
> I would think this is especially true for non-local frequencies,
> such as one received over the air. I'll leave it to you FMT
> guys to comment on the magnitude of degr
Didier Juges wrote:
> I guess it depends on signal to noise ratio. With reciprocal counters, you
> only need one period to measure as acurately as you need, but to have good
> acuracy, you need very good S/N, as there is no filtering possible.
>
> For example, the HP 5370 can measure a single peri
e and frequency measurement
> Subject: Re: [time-nuts] FMT on October 13
>
>
> > Plans are to transmit two 10 minute test periods, and a
> third if the
> > transmitters aren't melting by that point.
>
> > Our goal is to transmit a signal known in frequency
>> Plans are to transmit two 10 minute test periods, and a third if the
>> transmitters aren't melting by that point.
>
>> Our goal is to transmit a signal known in frequency to parts in 10e-12
>> (i.e., less than 0.0001 Hz error at 10 MHz) and stable to a similar
>> level during the course of th
> Plans are to transmit two 10 minute test periods, and a third if the
> transmitters aren't melting by that point.
> Our goal is to transmit a signal known in frequency to parts in 10e-12
> (i.e., less than 0.0001 Hz error at 10 MHz) and stable to a similar
> level during the course of the tran
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The Midwest VHF/UHF Society (located in Southwest Ohio) is pleased to
announce that the first annual MVUS Frequency Measuring Test will be
held on Saturday, October 13, 2007. There will be two transmission
periods: the first at
); SAEximRunCond expanded to false
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I will be continuing the two frequency FMT on 80 meters tonight. The current
span is about 100 Hz. When most of the Doppler is removed from the
equation, calibration becomes the overriding factor. Check out the details
on the W
); SAEximRunCond expanded to false
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I will be doing a 17,20,40, and 80 meter run. Marvin will be doing the West
Coast run on 40 meters.
Check the website for time and details.
http://pages.suddenlink.net/k5cm/
73
Connie
K5CM
__
); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED] RETRY
http://pages.suddenlink.net/k5cm/
73
Connie
K5CM
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and
); SAEximRunCond expanded to false
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See details at:
http://pages.suddenlink.net/k5cm/
73
Connie
K5CM
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); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED]
See the website for details:
http://pages.suddenlink.net/k5cm/
73
Connie
K5CM
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Tonight at 02:30 utc.
I expect QRM problems from N6WK, so I may have to move several KHz from my
normal frequency.
details here:
http://pages.suddenlink.net/k5cm/
Connie
K5CM
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onnie
K5CM
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Didier Juges
Sent: Saturday, May 26, 2007 8:11 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FMT
Well, I was too late sending my results, but I did manage to listen to
t
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Didier Juges
Sent: Saturday, May 26, 2007 8:11 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FMT
Well, I was too late sending my results, but I did manage to listen to
the signals
Well, I was too late sending my results, but I did manage to listen to
the signals this past Wednesday.
I did not have time to prepare anything but listening by ear on the
FT-1000 and using the HP-3586A as a beat generator (free running off
it's internal Ovenair precision OCXO), I managed to ge
Next FMT details at:
http://pages.suddenlink.net/k5cm/
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I will do a early 17 meter run.
Check the website for details:
http://pages.suddenlink.net/k5cm/
73
Connie
K5CM
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For details see:
http://pages.suddenlink.net/k5cm/
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For details of the next run see:
http://pages.suddenlink.net/k5cm/
Connie
K5CM
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The next FMT will be Wednesday night April 18. It will be one hour later
than normal this week.
11:30 PM EDT
10:30 PM CDT
9:30 PM MDT
8:30 PM PDT
3:30 UTC (Thursday UTC)
80 near 355 Hz
40 near 7055000 Hz
160 near 1887000 Hz
Send your results and comments with in 22 hours to [EMAIL PROTECTED]
Results are at:
http://pages.suddenlink.net/k5cm
If you have already viewed the results, you might want to check again. I
just added more comments a few minutes ago.
Connie
K5CM
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Results of the April 4th "Sudden FMT" are at:
http://pages.suddenlink.net/k5cm
Connie
K5CM
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Results of Wednesdays FMT are now at
http://pages.suddenlink.net/k5cm
If you missed this one, there will be another FMT next Wednesday.
73
Connie
K5CM
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As most of us know its one thing to practice on WWV or CHU and totally
another to find and measure the frequency of an unknown signal in a short
time period. So with that in mind I though it would be fun to do some
practice FMT's.
I have been running tests with Joe KM1P in Boston, and we think 80
of precise time and frequency measurement
Subject: Re: [time-nuts] FMT Results Published !
One more set: (from PA)
1600
80 -0.1
40 -1.4
WA6ZTY -1.83 ( I made a stupid 2 Hz math error - my actual measurement was
-0.17)
I agree, it looks like the W1AW 40 M measurement was off.
BR
One more set: (from PA)
1600
80 -0.1
40 -1.4
WA6ZTY -1.83 ( I made a stupid 2 Hz math error - my actual measurement was
-0.17)
I agree, it looks like the W1AW 40 M measurement was off.
BR
On 3/7/07, Joe Fitzgerald <[EMAIL PROTECTED]> wrote:
>
> Connie Marshall wrote:
>
> > In th
Connie Marshall wrote:
> In the old FMT days call signs were published with the results.
Here are mine :
160 0.1
80 -0.5
40 -1.4
WA6TZY
40 No copy
-Joe KM1P
Boston MA USA
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: Wednesday, March 07, 2007 11:59 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FMT Results Published !
At 07:05 AM 3/7/2007, you wrote:
>Mike Fahmie wrote:
> > 2006 FMT results have appeared at:
> >
> > http://www.arrl.org/w1aw/fmt/2006/2006-fmt-r
At 07:05 AM 3/7/2007, you wrote:
>Mike Fahmie wrote:
> > 2006 FMT results have appeared at:
> >
> > http://www.arrl.org/w1aw/fmt/2006/2006-fmt-results.html
> >
>
>It is curious that none of us managed to be within 1 Hz on 3 bands. I
>missed out by 1.4 Hz on 40M ... but then there were a lot of us
Mike Fahmie wrote:
> 2006 FMT results have appeared at:
>
> http://www.arrl.org/w1aw/fmt/2006/2006-fmt-results.html
>
It is curious that none of us managed to be within 1 Hz on 3 bands. I
missed out by 1.4 Hz on 40M ... but then there were a lot of us who
measured on the low side on 40 relati
2006 FMT results have appeared at:
http://www.arrl.org/w1aw/fmt/2006/2006-fmt-results.html
-Mike-
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I received my letter yesterday and the ARRL stayed with the same numbers I
posted last month. Based on mine, and other reports I beleve their 40 meter
reading is probably low by around 1Hz. I read the W1AW 40 meter frequency
1.13 Hz higher. My copy on W1AW was strong and stable at the time.
I read
ther.
>>
>> Connie
>>
>> -Original Message-
>> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
>> Behalf Of John Ackermann N8UR
>> Sent: Wednesday, January 03, 2007 9:33 AM
>> To: Discussion of precise time and frequency measurement
>
>Behalf Of John Ackermann N8UR
>Sent: Wednesday, January 03, 2007 9:33 AM
>To: Discussion of precise time and frequency measurement
>Subject: [time-nuts] FMT 2006 results
>
>
>I've put my FMT results at http://www.febo.com/time-freq/fmt/fmt2006/
>based on the prelimin
frequency measurement
Subject: [time-nuts] FMT 2006 results
I've put my FMT results at http://www.febo.com/time-freq/fmt/fmt2006/
based on the preliminary numbers from ARRL that Connie posted here.
As I noted earlier, I screwed up the math and ended up being off on all
three bands by 75 to 1
I've put my FMT results at http://www.febo.com/time-freq/fmt/fmt2006/
based on the preliminary numbers from ARRL that Connie posted here.
As I noted earlier, I screwed up the math and ended up being off on all
three bands by 75 to 110 Hz -- double the delta between W1AW and my
marker, because I di
John Miles said the following on 12/29/2006 03:24 PM:
> Does the 3586C have an AGC-controlled IF output? A BFO synthesizer would be
> a good idea, but it might not be necessary if you can filter and measure the
> IF directly.
It has an IF output as well as a built in counter with 0.1 Hz
resoluti
I didn't enter the FMT due to the lack of an HF antenna, but my original
plan was to downconvert the signal with a GPS-locked LO, then run it through
a logamp and a very narrow CW filter and straight into my 5370B without any
demodulation at all. As long as there were no interferers within the CW
Mike Suhar said the following on 12/29/2006 02:32 PM:
> I used an HP 3586C Frequency Selective Voltmeter with the tracking generator
> looped back to the RF input via a step attenuator. The audio output went to
> the PC. An ICOM IC-745 was tuned to the 160M signal to hear the test
> announcement
]
Cc: tim-nuts mailing list
Subject: Re: [time-nuts] FMT
Yes. I regret now that I rounded off the WA6ZTY frequency to the nearest
0.1 Hz. I might have been exactly in agreement if only I had rounded to
the nearest 10 millihertz.
I used a Ten-Ted RX340 receiver, which has the advantage that it
> Connie
> K5CM
>
> PS: by the way my Daughter's call is N5KK
>
>
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> Behalf Of James Maynard
> Sent: Friday, December 29, 2006 4:22 AM
> To: tim-nuts mailing list
> Subje
My numbers were:
W1AW (40 m band): 7038806.3 Hz
(1.4 Hz higher than the official reading)
WA6ZTY: 7028351.5 Hz
(0.03 Hz higher than the official reading)
I only submitted readings to the nearest 100 mHz (that is, 0.1 Hz),
as I didn't think my measurements supported more digits
same
numbers as he gave me today in his email.
Connie
K5CM
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Henry Knoepfle
Sent: Thursday, December 28, 2006 9:47 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FMT
Discussion of precise time and frequency
> measurement; Time-Nuts
> Subject: Re: [time-nuts] FMT
>
>
> Very interesting - the measurements I submitted were:
>
> 160: 1854317.63
> 80: 3857117.47
> 40: 7038806.11
>
> 40 (west coast): 7028351.61
>
> I too got a &
]
Sent: Thursday, December 28, 2006 5:41 PM
To: [EMAIL PROTECTED]; Discussion of precise time and frequency
measurement; Time-Nuts
Subject: Re: [time-nuts] FMT
Very interesting - the measurements I submitted were:
160: 1854317.63
80: 3857117.47
40: 7038806.11
40 (west coast): 7028351.61
I too got a
Bill Tracey said the following on 12/28/2006 06:41 PM:
> I too got a >1hz high error on W1AW on 40. As I recall, the data had a
> double peak in it - think I picked the stronger peak which apparently was
> the wrong one. Apparently the propagation on 40 was interesting when the
> test was ru
Very interesting - the measurements I submitted were:
160: 1854317.63
80: 3857117.47
40: 7038806.11
40 (west coast): 7028351.61
I too got a >1hz high error on W1AW on 40. As I recall, the data had a
double peak in it - think I picked the stronger peak which apparently was
the wrong one. App
Here is the WA6ZTY tx frequency:
40 Meters - 7028351.47 Hz
My reading:
7028351.54 Hz
I'm only off by .07 Hz here, so I feel my system was calibrated OK. Not yet
sure why my reading on W1AW 40m was so far off (1 Hz).
Connie
K5CM
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Here are the W1AW FMT Numbers I just received from Joe, NJ1Q (W1AW Station
Manager)
160m - 1854317.5 Hz
80m - 3587117.5
40m - 7038804.9 Hz
My copy of W1AW:
160M 1854317.77 Hz
80M 3587117.95 Hz
40M 7038806.03 Hz
I missed the 40m W1AW frequency by 1 Hz for some reason Hmm.. I wil
You might also look over your data, and, if you captured a screen image,
that image. I assume that the ionoshpere was rising at the time of the
FMT. If that is the case, then f1 should be lower in frequency than f0,
and f2 lower in frequency than f1.
If, however, the fainter trace is *higher*
Really interesting analysis, James. I'll need to do some checking to
determine my distance from W1AW, and where that puts me in the skip zone.
John
James Maynard said the following on 11/19/2006 02:08 PM:
> John Ackermann N8UR wrote:
>> Without giving away any actual numbers, did anyone els
John Ackermann N8UR wrote:
> Without giving away any actual numbers, did anyone else notice either a
> fuzzy signal, or some interference within about 1 Hz of W1AW on 40M?
>
> I recorded the entire test run and have been unable to prove to myself
> exactly where W1AW is; almost any sample of data
Without giving away any actual numbers, did anyone else notice either a
fuzzy signal, or some interference within about 1 Hz of W1AW on 40M?
I recorded the entire test run and have been unable to prove to myself
exactly where W1AW is; almost any sample of data I select shows two
signals within abo
I did not hear a peep out of the 40 meter Bay Area station in Boulder,
Colorado. It may have been the result of the time of day. I did receive the 80
meter and 40 meter ARRL signals from the East Coast. No luck at all on 160
meters.
Colin
_
I debated whether to stay up and try, but with my lousy antennas I
thought the odds of hearing it here in Ohio were fairly small, so I went
to bed instead...
John
Henry Knoepfle wrote:
> Did anyone hear the west coast station? I and another station here in
> Tucson did not.
>
> Henry
>
Didn't hear anything in Long Beach, CA. or Riverside, CA. from the
west coast transmission. Heard W1AW ok though.
Doug K6JEY
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Heard it in Round Rock, TX (EM10) - was considerably weaker than W1AW.
Bill (kd5tfd)
At 11:47 PM 11/16/2006, you wrote:
>Did anyone hear the west coast station? I and another station here in
>Tucson did not.
>
>Henry
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Did anyone hear the west coast station? I and another station here in
Tucson did not.
Henry
On 11/16/06, John Ackermann N8UR <[EMAIL PROTECTED]> wrote:
>
> Hi Bert --
>
> We tend to talk about FMT techniques before the test, and a little bit
> about propagation, etc., afterwards. But I don't s
Hi Bert --
We tend to talk about FMT techniques before the test, and a little bit
about propagation, etc., afterwards. But I don't share, and I don't
think anyone else should share, results until after the submission
deadline on the 15th. After that, it's fair game.
73,
John
Bert wrote
Subject: [time-nuts] FMT
Hi everyone,
Is it common practice to share your FMT results on the time-nuts mailaing
list? Or is there pride in trying to be the best of the best (who knows...)?
Should we all wait after December 15th...?
Cheers.
Bert, VE2ZAZ
Hi everyone,
Is it common practice to share your FMT results on the time-nuts mailaing list?
Or is there pride in trying to be the best of the best (who knows...)?
Should we all wait after December 15th...?
Cheers.
Bert, VE2ZAZ
__
Do You Yaho
Recent radios of that grade all have TCXOs, and that level of
performance is really not that hard to achieve today at constant
temperature.
My Yaesu FT-1000 Mk5 Field (with TCXO) drifts much less than 0.5 Hz at
14 MHz between 30 minutes and one hour after being turned on (in
receive), but a co
That's interesting -- from your earlier message, I thought they were
still running the Harris exciters for the test itself. It'll be
interesting to monitor the drift during the test.
My plan is to record audio (W1AW plus my known-frequency marker) of all
three bands simultaneously for the whole t
I received the following email from the station manager of W1AW.
Hi Colin,
I didn't want to answer your question too soon.
On the days prior to the FMT, I conduct measurements at 1 hour, 3 and 6 hours
after initial warm-up. (And of course, this time frame includes the normal
broadcast sched
--- John Ackermann N8UR <[EMAIL PROTECTED]> wrote:
> Hi Normand --
>
> Your method is similar to mine, except that I use a
> much closer beat
> note (usually less than 100 Hz) and use spectrum
> analyzer software and a
> sound card to measure the beat note (in the form of
> the delta between
Didier Juges said the following on 11/10/2006 10:05 PM:
> Hi Mike,
>
> Interesting, I was just doing pretty much that, except that I did not
> think of using the tracking generator of the 3586A as a reference, I
> used an 8657B synthesizer phase locked to the Thunderbolt GPSDO to
> inject a ref
Hi Mike,
Interesting, I was just doing pretty much that, except that I did not
think of using the tracking generator of the 3586A as a reference, I
used an 8657B synthesizer phase locked to the Thunderbolt GPSDO to
inject a reference signal 20Hz above the test signal (I used WWV at 5
MHz for t
or frequency control?
Mike
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of John Ackermann N8UR
Sent: Friday, November 10, 2006 6:34 PM
To: Hal Murray
Cc: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FMT
Hal Murray said
Hal Murray said the following on 11/10/2006 04:52 PM:
>> I think one of the reasons this method works so well is that the FFT
>> effectively averages the signal over some time, and I use a tool in
>> the software to derive an average across all the FFT results. That
>> smooths out the instantane
> I think one of the reasons this method works so well is that the FFT
> effectively averages the signal over some time, and I use a tool in
> the software to derive an average across all the FFT results. That
> smooths out the instantaneous variations that make real-time
> measurement such a
Hi Normand --
Your method is similar to mine, except that I use a much closer beat
note (usually less than 100 Hz) and use spectrum analyzer software and a
sound card to measure the beat note (in the form of the delta between
two traces on the waterfall display).
I think one of the reasons thi
Personnaly, i use a self-developed technique to
remotely measure a station's frequency:
I use a precision OXCO controlled RF signal generator
to inject an unmodulated (CW) signal (via a
directional coupler) signal 1000 Hz below the actual
station's frequency (example, to monitor CHU at 7335
kHz, i
Hi Colin --
Actually, the transmitters used for the FMT seem to be very stable and
as far as I've been able to observe (during each of the 4 FMTs since
they restarted the event) don't drift by a noticeable amount during the
test.
I'm actually more concerned about the ARRL's measurement setup t
I just finished several email exchanges with Joe Carcia, station manager for
W1AW, about the operation of the station. I had hoped that the regular daily
bulletins broadcast by W1AW would be tightly controlled in frequency, which
would allow me to get some practice measuring them. He informed me
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