I received this all jumbled up in one long line without any sort of
formatting, because the sender's mail client does not use
standardized structure -- so I don't know who wrote what:
A 74HC4046 can reach 19.2 MHz
Be very careful about specs like that and be sure to read all the
fine
Moin,
On Fri, 14 Jun 2013 14:51:44 -0400
Charles P. Steinmetz charles_steinm...@lavabit.com wrote:
His early papers may be derived from the
dissertation, including Non linear effects in
piezoelectric quartz crystals (Physical
Acoustics vol XI pp 245-288, Academic press 1975).
Yes, i have
On Sat, 01 Jun 2013 13:12:52 -0700
Jim Lux jim...@earthlink.net wrote:
Or better, the 42ns PTTI conference paper by Greg Weaver at APL, who had
to build them.
That would be [2] then? A little question here: AFAIK satelites vibrate
a lot. How do they account/compensate for the vibrations
Looks like the CDCE913 is the simplest one chip solution. The frequency in
the subject line is in error. What is needed is 19.2MHz.
So inside the CDCE913 we divide by 25 then multiply by 23. Or said
differenty 9.2MHz = (23/25) 10MHz.
The CDCE193 is a 14 pin chip that will do the above. It
In message 25AAB11446C04D4897253FDD883547E1@pc52, Tom Van Baak writes:
It would be a good project for a RPi (running an NTP client) or
an Arduino (using a cheap GPS NMEA+1PPS receiver). If you can spot
holes in the design let me know. It seems too simple to be true.
NTP shouldn't be needed: The
Tom,
Yes indeed thats what the phase flipper components are all about (Though
simply not added) to the d-psk-r. Essentially the costas loop gives you the
1 and 0 and then you flip an invert or non invert amp. That allows any rcvr
to work. You can soft limit to improve the signal for the
On Fri Jun 14 20:13:51 EDT 2013, Gabs Ricalde wrote:
As an alternative to the Net4501, the AM335x in the Beaglebone has
timers ...
I'm finishing the clocksource driver for Linux
Which distribution and which kernel are you using?
___
time-nuts
As I have been working on the d-psk-r its always been clear to me that a
simple non invasive approach to fix the 8170 class clocks existed. Since
the d-psk-r has consumed far more time then I ever would have guessed, I
would like to offer the approach up to the group. Maybe someone else has
some
Hi
I believe I suggested this approach back about 6 months ago. There was a
significant controversy about my use of the term seems simple.
Bob
On Jun 15, 2013, at 9:51 AM, paul swed paulsw...@gmail.com wrote:
As I have been working on the d-psk-r its always been clear to me that a
simple
The NXP 9046 is speced for zero dead zone.
http://www.nxp.com/documents/data_sheet/74HCT9046A.pdf
No dead zone of PC2 - from the above spec sheet
PC2 is the phase detector you will probably use
center frequency up to 17 MHz (typical) at VCC= 5.5 V
That tells you that 19.2 MHz may be good
On Sat, 15 Jun 2013 09:49:11 -0400, time-nuts-requ...@febo.com wrote:
--
Message: 3
Date: Sat, 15 Jun 2013 08:59:40 +0200
From: Attila Kinali att...@kinali.ch
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re:
Simon wrote:
The NXP 9046 is speced for zero dead zone.
center frequency up to 17 MHz (typical) at VCC= 5.5 V
Yes, that is what my message said:
The 74HCT9046 may be a better choice (no dead zone), but
you may need to select parts to run them at 19+ MHz.
Did you read it before
On Fri, Jun 14, 2013 at 08:12:30PM +0200, Attila Kinali wrote:
If anyone has an idea where and how i could get a copy (in any form)
of
Mécanismes non linéaires dans les résonateurs à quartz:
théorie, expériences et applications métrologiques
par Jean-Jacques Gagnepain, 1972
The French
Bob no idea actually. But I do have the MSA 8160 rcvr on the bench and
simply can add the ne602. Also John Lowe from NIST actually
suggested/alluded to it over a year ago before he ducked out of time-nuts.
Its one of those fairly obvious answers. Definately not high on my priority
list.
Its as
I just uploaded a video to YouTube of my scope display. Others have
also made similar videos. You can see it
at: http://www.youtube.com/watch?v=um8HxRHkkKw Pardon the fan noise.
Burt, K6OQK
Gang,
I took a look at the WWVB signal using a 1:1 Lissajou signal the same
way I do for the
I see no reason to go crazy writing code.
Bob,
Too late, see http://leapsecond.com/tools/wwvb_pm.c
Can I test it by just rotating (or not) the WWVB antenna with my wrist in sync
with a GPS tick (think NRZ encoding)?
/tvb
___
time-nuts mailing
Hi Perry, I was browsing a 1988 HP catalogue tonight..
The 8566B came in at a cool 62 thousand dollars new.
Wow!
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Perry Sandeen
Sent: Friday, 14 June 2013 2:48 PM
To:
Hi Perry,
While I agree with everything else you say, you CAN have too much filter
capacitance. At least where dc rectifier / filter (smoothing) circuits are
concerned. Increasing C causes increased ripple current and inrush current and
can overstress rectifiers and transformers. Not actually a
That works out to $118,480 in 2012 dollarettes.
http://www.westegg.com/inflation/
Dave
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens
Sent: Saturday, June 15, 2013 13:46
To: Perry Sandeen; Discussion of
In message 1371329221.83869.yahoomail...@web171902.mail.ir2.yahoo.com, Robert
Atkinson writes:
While I agree with everything else you say, you CAN have too much
filter capacitance. At least where dc rectifier / filter (smoothing)
circuits are concerned. Increasing C causes increased ripple
Sorry for the interruption but what is 'PFC'?
Thanks.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Poul-Henning Kamp
Sent: Saturday, June 15, 2013 4:09 PM
To: Robert Atkinson; Discussion of precise time and frequency
Although off-topic here, the PFC (or power factor correction) is a
switching mode front-end used to correct the cos-phi of the otherwise
capacitive load that every switching mode power supply is for the
mains.
On Sat, Jun 15, 2013 at 11:52 PM, J. L. Trantham jlt...@att.net wrote:
Sorry for the
Thanks. Now it makes sense.
Sorry for the interruption.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Azelio Boriani
Sent: Saturday, June 15, 2013 4:58 PM
To: Discussion of precise time and frequency measurement
Subject: Re:
Joe,
With the tradition rectifier/filter power is only drawn on both side of
the peak of the sine of line voltage, sort of like this:
--- ---
-| |--| |
because the rectifier diodes only conduct when Vsupply Vcapacitor
With a switching converter, using an
PFC to me is power factor correction, not only the classical power
factor to minimize (VAR) volt-amp reactive component,
but also to remove the harmonic load current imposd on the electrical
power system.
A '90's onward technique. in th 80's and 90's without the harmonic load
current
Hi
I think spitting the bit out a PC serial port line and running a 74HC series
switch would be pretty easy. Less than $10 in parts including the pert board
and the time to solder the roughly eight connections.
Bob
On Jun 15, 2013, at 2:41 PM, Tom Van Baak t...@leapsecond.com wrote:
I see
jlt...@att.net said:
Sorry for the interruption but what is 'PFC'?
For terms like that, Wikipedia is often a good first try.
In this case, PFC goes to a disambiguation page and there are 9 possibilities
under. A quick scan finds the interesting one.
http://en.wikipedia.org/wiki/PFC
--
Hi
The 74HC4053 looks like it would do the job pretty well.
Bob
On Jun 15, 2013, at 7:42 PM, Bob Camp li...@rtty.us wrote:
Hi
I think spitting the bit out a PC serial port line and running a 74HC
series switch would be pretty easy. Less than $10 in parts including the pert
board and
Greetings Gentlemen!
I have been following the thread on HP equipment repair, as I have a bunch
of it and am waiting the inevitable day when something starts to smoke.
That being said, I agree with the gentlemen that say fixing is better than
junking and also about the diminishing
Oh that is so sad, Trying to track down parts to find that some scrap metal
merchant has melted it down.
And to think a surplus dealer would knowingly scrap HP test equipment is just
plain sacrilege.
All those custom IC's and PROMS m e l t e d . .
God help us down under if any of the scrappers
it does I use that on my homebrew psk modulator.
Regards
Paul
On Sat, Jun 15, 2013 at 8:25 PM, Bob Camp li...@rtty.us wrote:
Hi
The 74HC4053 looks like it would do the job pretty well.
Bob
On Jun 15, 2013, at 7:42 PM, Bob Camp li...@rtty.us wrote:
Hi
I think spitting the bit out a
li...@rtty.us said:
I think spitting the bit out a PC serial port line and running a 74HC
series switch would be pretty easy. Less than $10 in parts including the
pert board and the time to solder the roughly eight connections.
How accurate does the switching have to be?
Note that there
As I mentioned earlier. Simply built up a AM rcvr using a MSA8160 clock
chip and then a inverter clock oscillator with a 60 Khz xtal and some and
gates. The spectracom came right up immediately locked the VCO and then
decoded time. Sweet.
Cost sub $10.
Will chicken scratch a drawing sometime
Do the bits coded by carrier amplitude drops correspond to bits coded by
phase changes? As I watched the video I was trying to listen for the
amplitude changes and watch the scope pattern but I think there were times
when there was no correlation.
Regards.
Max. K 4 O DS.
Email:
m...@maxsmusicplace.com said:
Do the bits coded by carrier amplitude drops correspond to bits coded by
phase changes?
No. There are two different encodings.
http://en.wikipedia.org/wiki/WWVB#Modulation_format
--
These are my opinions. I hate spam.
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