s on PCBs caused by trace contaminants and dendrite growth. A
PCB with sustained flame is shown, powered by a lithium coin cell
--
Best wishes,
Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
--
Best wishes,
Larry McDavid W6FUB
Anaheim, California (SE of Los
ry
On 5/13/2018 6:42 PM, Hal Murray wrote:
I can't count the number of times flux and whisker growth has caused
problems in circuitry and connectors.
A whisker might explain things. Would that also show up as over-current?
...
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Larry McDavid W6FUB
Anaheim, Calif
lt;https://www.datamatik.no/media/produkt/gps-4.pdf>
<https://www.wmo.int/pages/prog/www/IMOP/meetings/Upper-Air/Systems-Intercomp/Doc3-4(1)Vaisala.pdf>
<http://www.wless.ru/files/Accessaries/Antenna/sl1200%20product%20spec%20v7_1210.pdf>
...
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Larry McDavid W6FUB
Anah
he problem, I'd expect it to work poorly when first
installed,
or maybe decay slowly over time as something changed.
...
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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o you have a schematic for the board or is the layout so simple that it
is self evident once you look at the board?
Stay tuned for film at 11
-DC
de NR1DX
manu...@artekmanuals.com
On 5/12/2018 4:07 PM, Larry McDavid wrote:
I recently had an unexpected failure of a white-conical-dome
HP/Symmet
A GPS Reference (timing) antennas use a simple patch
antenna instead of a quadrafilar antenna and that old solder flux
residue will attenuate the even amplified GPS signal out of this antenna.
I welcome your constructive comments.
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Larry McDavid W6FUB
Anaheim, California (SE o
have a Tissot P-touch as a retirement gift from IBM. Got
the watch, as they say. I can say it is very accurate for a non-disciplined
watch if you wear it every day
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Best wishes,
Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, ne
lied test
datasheet.
Why would you want to set the output level higher than that at which the
risetime is fastest? ~ 1 vpp seems enough.
Larry
On 10/11/2017 8:29 AM, David DiGiacomo teli...@davmar.org [TekScopes] wrote:
On Tue, Oct 10, 2017 at 11:01 PM, Larry McDavid wrote:
> Neither
leobodnar.com/shop/index.php?main_page=product_info&cPath=124&products_id=295
This is built on a small PWB with integral BNC connector, powered by 5
vdc through a USB B connector; a trigger output is provided. Price is US$68.
I've ordered one of these for testing.
Is anyone here using one
products_id=295
This is built on a small PWB with integral BNC connector, powered by 5
vdc through a USB B connector; a trigger output is provided. Price is US$68.
I've ordered one of these for testing.
Is anyone here using one of these?
--
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Larry McDavid W6FUB
Anaheim, Califo
hat you pay for the shipping from
him to you and he will be in touch when the plates are ready to ship.
Thanks,
Steve
WB0DBS
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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etty quickly on a weekend
afternoon.
I mill keyed BNC and DBx connectors all the time.
...
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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To
being talented at repurposing,
will be able to think about this problem and come up with
a simple solution to interfacing with these boards.
No need to buy insert type connectors. I never had
any trouble making cables that connected to these units
using plain vanilla DB25's.
Rick N6RK
On
ented, or salvaged, or rusted. It even has all the
connectors and power supplies, and GPS, etc.
If any other time nuts have experience with each of these methods to obtain a
E1938 oscillator, please let us know.
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Larry McDavid W6FUB
Anahei
ig, but I surely won't have any trouble reading it across a
room!
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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cceptance of
this "UCCM" designation. But, what is the origin of this term and is it
valid?
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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To uns
Does Lady Heather software support the HP Z3801A GPSDO? I recently read
that it supports "most GPS receivers" but I have not heard that it
supports the Z3801A. It would be great if it can do this...
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near
tals would be considered prime temperature
sensors.
I can see that an instrument could be built that reliably showed many decimal
places of reading,
but I could never accept that a vacuum mounted quartz crystal would be closely
enough
thermally coupled to whatever was having its temperature measured
I have many pictures and complete schematics of the Racal 04E optional
OCXO used in many Racal counters. Ask if interested.
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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I bought two and the shipping was $12 within the US.
Sent via the Samsung GALAXY S5
Original message
From: Philip Pemberton
Date: 01/18/2016 10:53 AM (GMT-08:00)
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] LAST CALL for Symmetr
has 20 ps time resolution. In my case, it is
desirable because it is a lot smaller than the 5370B and it has USB,
GPIB and (best for me) Ethernet connectivity. The TimeLab software has
drivers built in for the 53230A.
Larry McDavid
On 12/12/2015 10:43 AM, Bert Kehren via time-nuts wrote
in/mailman/listinfo/time-nuts
and follow the instructions there.
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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ur to be within one
second
of GMT and performance telegraphed to Greenwich for checking)
http://www.parliament.uk/about/living-heritage/building/palace/big-ben/building-clock-tower/building-great-clock
...
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles,
amp; Company survives today and still produces
custom clocks, spanning three centuries of clock making excellence.
Alas, through personal correspondence, the Dent & Company today seems
unaware of the Dent Dipleidoscope.
Larry
On 11/9/2015 9:16 AM, James Hazi wrote:
Hi, I am trying to g
nt on its use via google books?
https://books.google.com/books?id=9QlbQAAJ&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false
Brent
On Mon, Nov 9, 2015 at 12:16 PM, James Hazi wrote:
> Hi, I am trying to get in touch with larry McDavid ,
James Hazi wrote:
Hi, I am trying to get in touch with larry McDavid , I came across a I.E. Dent
Dipleidoscope and I was wondering if he would give me some insight on it. I
would be able to send some pictures if you would request. Thanks, Jim
--
Best w
Would someone familiar with the facts please report the long-term Allen
Variance of the HP Z3801A and the FE-5680A.
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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special Air Force ATE standard.
Mine came with the Air Force setting.
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
http://www.prc68.com/I/DietNutrition.html
Sanjeev Gupta wrote:
On Sat, Nov 1, 2014 at 11:23 AM, Larry McDavid
wrote:
I gave a presentation on the Dent Dipleidoscope at the Harvard
conference
of the North American Sundial Society in 2013. If anyone i
elsewhere) even on country estates. As the British trains began to run
with minute scheduling, accurate time became much more important!
Best of all, the Dent Dipleidoscope is astonishingly easy to use!
Larry McDavid
NASS Sundial Registrar
And, multiple HP Z3801A owner... times change!
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s there.
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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and follow the instructions there.
-field.
Dave
KF7VNE
...
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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and fol
I just tried to run SatStat for the HP Z3801A on my new Windows 7 64-bit
computer and it reported it would not run under that OS.
What are folks using?
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland
7;s Electronics, several years ago.
Larry
On 2/19/2014 3:52 PM, Richard (Rick) Karlquist wrote:
Can anyone recommend a "atomic" wall clock
that displays in digital 24 hour UTC? Looking for largest
possible digits and LED preferred over LCD, under $100.
Any brands to avoid?
Rick
...
--
Be
4/2014 9:12 AM, J. L. Trantham wrote:
Larry,
Thanks for the info. What is 'RO'? I am not familiar with that
abbreviation.
Joe
...
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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WB4UIV
...
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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and follow the
mailman/listinfo/time-nuts
and follow the instructions there.
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and follow the instructions there.
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eidoscope: A Sundial By Another Name."
So, as Time Nuts, we can appreciate that time accuracy has come a long
way in just 150 years!
If you should happen to be in Cambridge for this event, do visit "The
Coop" bookstore near the Harvard campus. It is an amazing, 5-story high
p
modulation
scheme?
Larry
On 11/3/2012 4:32 PM, Charles P. Steinmetz wrote:
This has probably already been posted more than once, but if anyone is
still looking for a description of the new WWVB modulation scheme:
http://tf.boulder.nist.gov/general/pdf/2651.pdf (Sept. 2012)
...
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Best wishes,
Lar
://tf.boulder.nist.gov/general/pdf/2651.pdf (Sept. 2012)
...
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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wrote:
Page 19 - 30 in the latest edition of GPS World.
http://editiondigital.net/publication/?i=125872
Interesting read..
...
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Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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with that particular seller.)
Ebay #150753929036
Datasheet
http://antcom.com/productsheets/2G15A-XTB-1-N_D.pdf
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Larry McDavid W6FUB
Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland)
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I unexpectedly came into a small supply of the 3-pin "Universal"
Mate-N-Lock connectors that plug into the power connector on the rear
panel of the HP Z3801A GPSDO. If you need one of these and can't readily
find it locally, contact me off-list.
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Larry McDavi
another Z3801A that was not modified to
provide RS-232 communication; I have not yet received that Z3801A.
I would like to correspond off-list with the buyer of the modified
Z3801A; I will appreciate a contact to my email address used here.
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Larry McDavid W6FUB
Anaheim, CA
now this seller and I'm only reporting the listing.
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Larry McDavid W6FUB
Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland)
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P-P enough for your equipment? This amp is easy to modify
and I can greatly improve the specs by running it at +/- 15V rather
then the +/-5V it now uses.
So, my opinion: Video distribution amps can work but you'll be right
on the edge of the spec'd limits all around.
...
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.
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Larry McDavid W6FUB
Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland)
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and follow the
f the 5680A series Technical Manual.
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Larry McDavid W6FUB
Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland)
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precision 10 MHz source. Option
04E provides the Racal 9462 and there are other ocxo versions, such as
Option 04A, that offer better performance than 04C but not so good as
Option 04E.
Larry
On 1/30/2012 9:24 AM, cfo wrote:
On Fri, 20 Jan 2012 09:18:32 -0800, Larry McDavid wrote:
One does
: GPIB
Does anyone know what option 4C could be ?
I hope some super nice OCXO option from USAF , they have bases in .DE
...
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Larry McDavid W6FUB
Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland)
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e the counter to measure the time between
1pps and WWVB
zero crossing as an ultimate frequency reference as well as detecting
changes in the ionosphere.
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Larry McDavid W6FUB
Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland)
__
which
timebase my 1992 has, but I did notice the 5 to 10 MHz doubler
on the back of the oscillator, The back has separate coarse
and fine frequency adjustments. Can someone identify which
timebase is fitted to this counter?
The link below has the story and plot.
http://www.omen.com/ham/racal.html
ly. I welcome your
suggestions!
Larry W6FUB
On 2/14/2011 10:06 AM, ewkeh...@aol.com wrote:
Yes I am doing it with some very low cost switchers off ebay, followed by
linear regulators as I mentioned previously. Works great.
Bert Kehren
...
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Larry McDavid W6FUB
Anaheim, CA (20
inear regulated supply rather than a switching supply. I had a
TBolt die while connected to a switching supply in an environment where
there were frequent power outages.
...
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
Behalf Of Larry Mc
the 5 volt output. I'm asking if list
members have a favorite power supply for this unit, why and where I can
obtain one.
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Larry McDavid W6FUB
Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland)
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