On 8 December 2014 at 07:24, Chris Wilson ch...@chriswilson.tv wrote:
This is audible here in the UK and elicited many comments on 160
meters last night. Seen as oblique striations on SDR receiver displays
and audible as a clicking sound. What the devil is it?
Best Regards,
Is the signal still there?
I looked here on the West Coast - don't really see anything.
Thanks,
John
AJ6BC
On Mon, Dec 8, 2014 at 12:42 AM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
On 8 December 2014 at 07:24, Chris Wilson ch...@chriswilson.tv wrote:
Wouldn't you know it - about the time I sent that last e-mail - I am
getting something in the 1.915 MHz range right now - and you could say this
is around 4 Hz or so - I am trying to see if
I can get a match on any modulation type - but nothing so far. Definitely
wider though.
Regards,
John
this signal is being heard all across the eastern part of North America
and there are reports from at least as far west as Montana. I can hear
it during the day but at a very low level. Night time levels are much
stronger.
cheers, Graham ve3gtc FN25ig near Ottawa Canada
On 2014-12-07 19:09,
Radiolocation may be a bit misleading.
Some first thought that this was CODAR but it is not, at least not what
I am familiar with but it may be another variation of an ocean surface
wave RADAR type of system but it is certainly not like one I have heard
before.
cheers, Graham ve3gtc
On
Hello,
Can someone please post a *.wav file of what it sounds like provided you
have an SDR set-up?
If you need someplace to post - please send the file to me offlist and I'll
put it on either an ftp site or http.
I am not so convinced what I saw wasn't noise or some stations from China
Dear Mark,
Thanks for the file. In fact the 7204 IOS was work for 10year+ when it
pair w/ TimesSource3600 PRS. a few month before the TS3600 was dead and I
replace it w/ TS3550.
So I was wondering, is there something difference in TOD between TS3600
TS3550.
Any suggestion?, I already replace
It can be but suffers from enough jitter to be unusable.
All current BBB out of the box kernels have PPS-gpio. Google PPS gpio DTS
bbb.
Enjoy :-)
On Sunday, December 7, 2014, Chris Albertson albertson.ch...@gmail.com
wrote:
On Sun, Dec 7, 2014 at 12:09 PM, folkert folk...@vanheusden.com
Hi
The piles of this are hidden under the piles of that which are somewhere behind
the boxes of those….
Bob
On Dec 7, 2014, at 9:09 PM, Tom Miller tmiller11...@verizon.net wrote:
Bob, if you are like me, you probably don't know where they all are, even if
you wanted to count them. :)
HI
On Dec 7, 2014, at 4:52 PM, Gregory Maxwell gmaxw...@gmail.com wrote:
On Sun, Dec 7, 2014 at 7:03 PM, Bob Camp kb...@n1k.org wrote:
Of the $20K to $30K that a new tube costs, I doubt the material and basic
assembly adds up to over $5K. The rest of the cost is the final assembly /
test
On the 10MHz LTE-Lite, how far out from true UTC would the PPS be expected
to be?
It seems to be about 200+ ns late on my unit, although it is much more
stable than a typical GPS/PPS produces.
Thanks,
David
--
SatSignal Software - Quality software written to your requirements
Web:
Hi
On *most* GPSDO’s, the simple answer is “there is a cable delay adjustment to
align it”. Without some sort of reliable representation of UTC (at the ns
level) it’s tough to measure. If you happen to live at USNO or NIST, you can
access that sort of timing. For the rest of us - not so easy.
What is the source of the 1 PPS you are comparing against?
I compared my LTE-Lite to an old Thunderbolt (original model, single 24 V
input with internal DC to DC converters, Piezo oscillator). At the time,
the Thunderbolt had been running for a few months, while the LTE-Lite had
been running for
On 2014-12-07 16:28, Tim Shoppa wrote:
Would any time-nuts know of radiolocation-type testing going on, on east
coast of US, maybe around Maine? There is a very strong wideband signal on
1900-1920kHz, with a 120Hz substructure and a 4Hz rep-rate, likely megawatt
power range.
Sound sample
Hi
On *most* GPSDO’s, the simple answer is “there is a cable delay adjustment
to align it”. Without some sort of reliable representation of UTC (at the ns
level) it’s tough to measure. If you happen to live at USNO or NIST, you can
access that sort of timing. For the rest of us - not so easy.
Or use 1ns per foot of antenna cable. That will get you closer.
Sent from mobile
On Dec 8, 2014, at 8:16 AM, David J Taylor david-tay...@blueyonder.co.uk
wrote:
Hi
On *most* GPSDO’s, the simple answer is “there is a cable delay adjustment to
align it”. Without some sort of reliable
From: Bill Dailey
Or use 1ns per foot of antenna cable. That will get you closer.
==
I was using 5ns per metre to allow for velocity factor.
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email:
On 2014-12-07 16:28, Tim Shoppa wrote:
Would any time-nuts know of radiolocation-type testing going on, on east
coast of US, maybe around Maine? There is a very strong wideband signal
on
1900-1920kHz, with a 120Hz substructure and a 4Hz rep-rate, likely
megawatt
80*24 = 1920. 80th harmonic seems quite a stretch unless there is some
malfunction (as you point out maybe an interaction with 60Hz heating...
hmm... maybe they thought they could use PWM on the heating circuit.). For
sure they have enough power and enough wire in the air to do the damage
being
From: Dave Martindale
What is the source of the 1 PPS you are comparing against?
I compared my LTE-Lite to an old Thunderbolt (original model, single 24 V
input with internal DC to DC converters, Piezo oscillator). At the time,
the Thunderbolt had been running for a few months, while the
Also hearing in central NH sounds like a new 'Woodpecker' Joy...
Content by Scott
Typos by Siri
On Dec 8, 2014, at 2:24 AM, Chris Wilson ch...@chriswilson.tv wrote:
Hello,
on 08/12/2014 07:21 you wrote:
I'm hearing the same signal in northern New Hampshire.
Very strong
73,
On 12/8/14, 6:15 AM, Brian Inglis wrote:
On 2014-12-07 16:28, Tim Shoppa wrote:
Would any time-nuts know of radiolocation-type testing going on, on east
coast of US, maybe around Maine? There is a very strong wideband
signal on
1900-1920kHz, with a 120Hz substructure and a 4Hz rep-rate, likely
Gerhard Hoffmann wrote:
Am 29.11.2014 um 20:01 schrieb Gerhard Hoffmann:
Am 29.11.2014 um 19:08 schrieb Thomas S. Knutsen:
2014-11-29 16:24 GMT+01:00 Dave M dgmin...@mediacombb.net:
Yeah, that's a good way to completely avoid the issue. Since I'm
the only
target audience for my efforts, then
Hi,
In playing with some oscillators and a GPSDO here, I think I'm seeing a
voltage sensitivity issue.
So, I started looking at the output voltage of various regulators vs.
temp. Using standard LM/UA type linear regulators and some LDO's, they
all appear to be pretty sensitive to
Recorded last night. Audio bandwidth is a few kHz, but as mentioned before
the signal is about 20 kHz wide.
https://www.dropbox.com/s/bnp8zcpgw86l6ww/1910.wav?dl=0
This morning (14:21 UTC) nothing is heard
Frits W1FVB
Whitefield, NH
On 12/8/14, John C. Westmoreland, P.E.
Please Gerhard, more details on your choke
(medium size red Amidon core two 220 uH Siemens chokes).
Maybe I can use it for 160 meter antennas.
Your T1-1 measurements make sense according to
my experience with these things. The -6
series (T1-6, etc) has larger cores and should
withstand more
Am 08.12.2014 um 18:57 schrieb Dave M:
The text on the screen shots is a bit hard to read, but I think the
curves told me what I wanted to know..As with most other devices, it's
best to stay away from the Max figures on the datasheet.
You can get the pictures by action - download and then
Boy I have dug through the program and can not seem to find a way to clear
out the graphs. Tried exports and other things.
Anyone know the secret please?
Thanks
Paul
WB8TSL
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Paul,
I don't know for certain but with the limited playing around I have done
with this program, I would start by renaming the data file and then let
the program restart a new file from which I assume the graphs are
plotted.
I forget the file name off hand, might be something .dat or similar.
Hello Frits,
Interesting. A little different than what I heard - but of course depends
on the bandwidth somewhat.
How many dB was this up from the noise floor? Or - what is the signal
level of the received signal?
What modulation did you try to decode or did you just set it wide-AM?
I saw
Dan -
Almost all the 3-terminal 7805-style regulators are going to have tempcos
near -100 or -120PPM/DegC.
Bare 5.6V zener has a tempco closer to 40PPM/DEGC.
I don't know anything that combines the reference with the pass device in
the same package and gets to a few PPM/degC. Obviously
Hi Paul,
This puzzled me, too. Finally, I just deleted the txt file. Looking at, it,
it looks like maybe it's a weekly file. For example: Z38XXData2014CW50.Txt,
seems to mean week 50. At least that's my guess, since there's also a file
Z38XXData2014CW49.Txt that was last modified Sun 07 Dec
Time-Nuts Group,
I thought some of you might be interested in my experience with the
10MHz LTE-Lite.
The 10MHz LTE-Lite arrived about a week ago. I was not ready to make
a permanent installation, I wanted it portable and I wanted to get
started quickly. I am hobbyist interested mainly in
Am 08.12.2014 um 19:26 schrieb Richard (Rick) Karlquist:
Please Gerhard, more details on your choke
(medium size red Amidon core two 220 uH Siemens chokes).
Maybe I can use it for 160 meter antennas.
Siemens Chokes: yellow, 5.5mm dia, 27 mm long, a single ferrite rod
with a lot of turns. They
On Mon, Dec 8, 2014 at 11:07 AM, Byron Hayes Jr bha...@earthlink.net
wrote:
So, I brought out Big Gonzo, a HP 5335A counter with Option 010
(Hi-Stability time base) I purchased on eBay about six months ago but had
never fired up. It came up OK and I hooked it to the LTE-Lite output. It
Thanks everyone. I thought I was missing the magical super secret ctl ...
sequence.
Regards
Paul.
On Mon, Dec 8, 2014 at 2:37 PM, Bob Stewart b...@evoria.net wrote:
Hi Paul,
This puzzled me, too. Finally, I just deleted the txt file. Looking at,
it, it looks like maybe it's a weekly file.
I work with Said at Jackson Labs. I've been reading the time-nuts
discussion for a few years, but rarely chime in. I saw this discussion and
wanted to make a couple points.
* The LTE Lite time accuracy specification corresponds with the Skytraq GPS
receiver's specs page which I have attached.
Hi
If you read the NIST papers where they have looked at the PPS accuracy compared
to UTC, the results are not all that good. The assumption that any one GSDO is
“correct” compared to UTC is *not* a good one. The consistency of a GPSDO is
quite good. That’s a very different thing than it’s
Hi
As with anything else it’s a matter of “what’s in your wallet”.
The parts you are after are called voltage references rather than voltage
regulators. You can get them well down into the low ppm’s / C or lower. The
cutoff is more a function of “do you want to spend $100 or not” rather than
HI
At a 1 second gate, your 5335 is good to about 1 ppb. (1x10^-9). A TCXO based
GPSDO should be good to 10X that level. An OCXO based unit should be good to
100X that level. If you extend the counter’s gate time, the 5335 will overflow
fairly quickly. Up to the point it does, it’s accuracy
Enabling MEAN with 100 pts under Statistics should give an additional digit
but will take a few minutes for a reading with longer gate times.
Keith
Keith
On Mon, Dec 8, 2014 at 3:07 PM, Bob Camp kb...@n1k.org wrote:
HI
At a 1 second gate, your 5335 is good to about 1 ppb. (1x10^-9). A TCXO
Said asked me to forward this:
Hello Orin,
very nice job on the buffer design!
This confirms that minor changes in power consumption due to load changes
on the board affect oscillator stability. The 10MHz oscillator itself is
rated at up to +/-5ppb for load-induced changes, so that is very
Dan Kemppainen wrote:
Hi,
In playing with some oscillators and a GPSDO here, I think I'm seeing
a voltage sensitivity issue.
So, I started looking at the output voltage of various regulators vs.
temp. Using standard LM/UA type linear regulators and some LDO's, they
all appear to be pretty
Hi
On the 5335, the display changes a bit as you fiddle with the math. The actual
resolution does not change. When you get an extra digit, it really does not
step off in one count steps.
Anything you do that gets you to a 10X longer gate time does add a “real”
digit. Taking 10 back to back
List,
I have reproduced a Motorola Lightning Protection article from the PPRA
newsletter from the early 80's.
If anyone wants a copy please send me an ORIGINAL email off list and I'll send
you a PDF.
I will also post a copy to Didier's web site in a few days.
Regards,
Perrier
Hi
Hopefully the issue (and question) is about stability of the EFC voltage. Any
decent OCXO should have a voltage stability that’s well below it’s temperature
stability when run off of a fairly standard regulator. As an example, An OCXO
that does 5x10^-9 over 0 to 70 C probably has a voltage
Am 08.12.2014 um 19:18 schrieb Dan Kemppainen:
Hi,
In playing with some oscillators and a GPSDO here, I think I'm seeing
a voltage sensitivity issue.
So, I started looking at the output voltage of various regulators vs.
temp. Using standard LM/UA type linear regulators and some LDO's, they
We solved that problem by attaching the regulators to the FRK back plate
which is with fan control is kept within 0.01C. We did not do it for that
purpose but found that we needed some more heat in order to keep the fan in an
optimum fan speed. Rb, OCXO and Fan power transistor are on the
Well, it's alive, and I even have 10MHz coming from it. It took about 16
minutes to go to lock. Is that good, or doesn't matter? Now I've got to put
together a serial cable and see if I can talk to it and find out how it thinks
it's doing. But, this is good!
On 12/8/2014 4:53 PM, Bert Kehren via time-nuts wrote:
We solved that problem by attaching the regulators to the FRK back plate
which is with fan control is kept within 0.01C. We did not do it for that
purpose but found that we needed some more heat in order to keep the fan in an
optimum fan
Hi Rich:
Did you use the 723 or . . . .?
As far as I know the 723 is supposed to have low noise.
Mail_Attachment --
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
http://www.prc68.com/I/DietNutrition.html
Richard (Rick) Karlquist wrote:
On
John,
On 12/8/14, John C. Westmoreland, P.E. j...@westmorelandengineering.com wrote:
Hello Frits,
Interesting. A little different than what I heard - but of course depends
on the bandwidth somewhat.
I think my bandwidth was set at about 8 Khz
How many dB was this up from the noise floor?
Love to have known how long it was off, and how much of that 16
minutes was getting the tube degassed.
-pete
On Mon, Dec 8, 2014 at 7:11 PM, Bob Stewart b...@evoria.net wrote:
Well, it's alive, and I even have 10MHz coming from it. It took about 16
minutes to go to lock. Is that good, or
Hi Pete,
I don't have any way of knowing. I've asked the seller if he has a copy of the
control software, and I don't like to go back with a bunch of petty questions
like that. The next issue is adapting some serial port software i wrote to the
protocol in the manual Magnus sent to see if I
Hi Bob,
I think using a latching relay is a very good idea and prudent. Besides
while it is reacquiring lock you would probably be busy resetting VCR's
and so forth.
BillWB6BNQ
Bob Stewart wrote:
Hi Pete,
I don't have any way of knowing. I've asked the seller if he has a copy of
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