. Unfortunately I can not remember the details of
the issue. This was on Red Hat Linux. If this sounds like it could be the
problem I can ask one of our Linux admins for details.
Mike
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Didier Juges
start and about 7 minutes to
within 0.1 Hz of final frequency.
Didier KO4BB
Didier Juges wrote:
That is interesting. I have not checked the 10811 for that particular
behavior, but I have checked a number of cheap, non TC crystal oscillators,
and the initial drift has always been much
4209,402759,73
4509,669633,04
4809,863313,67
5109,99790,21
54010,0062-0,62
5709,99580,41999
6009,99250,75
9009,99330,67
12009,99370,63001
Didier Juges wrote
For those interested, google tin wiskers and look up the NASA web site
that has lots of good pictures. It is scary to think people actually
build equipment with that stuff.
Needless to say, in my business (military electronics), nobody wants to
hear about lead free solder. The prime
Well John, I need to think about that one. If you click on the high
bidder, you do get quite a bit more information than with the old
system. Even though the information was available, it would have been
hard to put it together. With this new system, they give it in summary
form, so in that
have enough of the leads exposed
that if left unprotected could grow wiskers. For commercial
applications, where conformal coating is too expensive, I am not sure
what the fix will be.
Didier KO4BB
Didier Juges wrote:
For those interested, google tin wiskers and look up the NASA web site
Hi Gerald,
I don't think you can find much simpler than James Miller's project:
http://www.jrmiller.demon.co.uk/projects/ministd/frqstd.htm
Lots and lots of people have built it. If you do not use a Jupiter
receiver, you will need more dividers (the Jupiter outputs 10 kHz in
addition to the 1
It would be helpful to know who this seller is.
Thanks in advance.
Didier KO4BB
[EMAIL PROTECTED] wrote:
Hello,
I purchased one of the HP 10811-60155 standards on ebay one month ago and it
was just delivered today. Seller promised to send edge connector and
pinouts, but now refuses to
Regarding the Thunderbolt, I got some information from the Trimble sales
manager for timing products:
The Thunderbolt was designed and built in-house (of course from parts
bought from outside sources). So, the software and IP are Trimble, not
OEM'd. Any resemblance with the Symmetricom 58540A
I am looking for 4 knobs for my spare HP 5370A counter. They go on a
1/8 shaft. They have 2 screws and an index.
They do not need to exactly match the original model (for instance, the
index is not really useful since the instrument displays the trigger
voltage), but I would prefer that all 4
David I. Emery wrote:
As for performance, I am curious myself. Certainly the
Thunderbolt is better documented in respect to performance, but whether
in fact it actually IS a lot better when GPS locked is something I'd
like to know. Its firmware does seem to supply a lot more data
You are welcome to upload them to my Manuals page by ftp to ftp.ko4bb.com
login: manuals
password: manuals
Then send me an email and I will move the manual with the others at
www.ko4bb.com/ham_radio/Manuals
Thanks in advance
Didier KO4BB
Joseph Gray wrote:
I have a PDF of both the Operation
I have some serial code under Linux that kind of works. Not extremely
robust, but it is being used by the government on some NMD program, so
it's got to be good enough :-)
It is in C and the program runs in console mode. The code uses the
serial port in half duplex mode, which should be fine
-
From: Didier Juges [EMAIL PROTECTED]
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Wednesday, January 10, 2007 5:16 PM
Subject: Re: [time-nuts] Looking For Tektronix Knobs 22xx Series
You are welcome to upload them to my Manuals page by ftp
After I bought my Thunderbolt, I sent Trimble an email asking for what the
current firmware was. I gave them the version in my unit. I have not gotten a
response yet, but it has only been a month and a half...
I am not holding my breath. They are probably more interested in selling new
units.
If the unit has an internal 10 MHz OCXO, it is hard to imagine the 15
MHz being cleaner than the 10 MHz, so it would seem the best way
(simpler and cleaner) is actually to tap off the OCXO with a suitable
buffer amp.
Didier KO4BB
jmfranke wrote:
One approach would be to divide the 15 MHz by
Just like with wine, making good crystals involves a lot of knowledge
and a little bit of magic...
Happy new year!
Didier KO4BB
Bill Hawkins wrote:
Brooke,
I foresee a discussion similar to those of wine connoisseurs.
What is the maison and vintage of the crystal? Was it
found on the
Hi David,
David I. Emery wrote:
On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier Juges wrote:
When reading the data sheet for the Thunderbolt, and reading all the
pitfalls associated with non-integrated GPSDO designs using stand alone
GPS receivers, such as sawtooth correction
David I. Emery wrote:
On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier Juges wrote:
When reading the data sheet for the Thunderbolt, and reading all the
pitfalls associated with non-integrated GPSDO designs using stand alone
GPS receivers, such as sawtooth correction and quantization
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Hi David,
David I. Emery wrote:
On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier Juges wrote:
When reading the data sheet for the Thunderbolt, and reading all the
pitfalls associated with non-integrated GPSDO
Dr Bruce Griffiths wrote:
Dr Bruce Griffiths wrote:
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Hi David,
David I. Emery wrote:
On Tue, Dec 26, 2006 at 04:14:45PM -0600, Didier Juges wrote
Dr Bruce Griffiths wrote:
Didier Juges wrote:
This discussion is fascinating, and as always it has prompted a number
of other questions for me.
I understand the sawtooth correction is provided to allow correction of
1 PPS timing errors when the processor clock is non-coherent
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Magnus Danielson wri
tes:
harmonic(2)
1a) a tone in a harmonic series
2) in physics, a component frequency of a harmonic motion that is an integral
multiple of the fundamental frequency
overtone
1b) Harmonic(2)
Overtone
John,
Nice pics!
Did you at least run it to see if it works and what kind of performance
you could get out of it?
Didier KO4BB
John Ackermann N8UR wrote:
My RFTG-m-XO arrived today, and the first thing I had to do was rip it
apart. I've put a series of pictures of the thing in various
If you have LabVIEW and a compatible GPIB controller, then all is done
for you.
Have fun.
Didier KO4BB
Jack Hudler wrote:
I was just looking for a quick fix to get going.
While waiting I setup LabView to do it. Tweaking with the file format now.
Thanks
My HP 5334B has been doing the following since I got it off eBay this
summer. It's not a major problem, but it is irritating and I would like
to fix it, but I don't know where to start...
At power up, when being fed two signals for TIC measurements, the
instrument passes self test without
Thank you Jack, it makes sense, but I am not aware of the logic used by
HP for serial numbers. I know it's been covered extensively on the
hp_agilent newsgroup, I just don't recall.
Thanks anyway and Merry Christmas to you and all time-nuts.
Didier KO4BB
Jack Hudler wrote:
Your manual 2934
[EMAIL PROTECTED]
To: 'Didier Juges' [EMAIL PROTECTED]
Done (I think). Never uploaded to an FTP site b4.
If you don't see GPS4-Manual v2.2.pdf. Please tell me how to upload.
REM
-Original Message-
From: Didier Juges [mailto:[EMAIL PROTECTED]
Sent: Thursday, December 21, 2006 8:35 AM
http://www.hparchive.com/hp_journals.htm
Didier KO4BB
Brooke Clarke wrote:
Hi Bruce:
How to get a copy?
Have Fun,
Brooke Clarke
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com
/Time Interval Averaging: Theory,
In the matter of lifetime (outside of MTBF issues), is it correct that
Rb has a built-in life limiting mechanism (the lamp wears out), where Qz
does not? If so, Rb oscillators will eventually fail but one might hope
a Qz oscillator may not.
Didier
Tom Van Baak wrote:
Hello folks,
i like to
I did just that to check the 50 MHz crystal in my HP 3586 and convince
myself it was not dead. The 50 MHz VCXO did not oscillate, for some
reason, and finding a replacement crystal would have been a long shot
and would have probably cost more than I paid for the instrument.
Seeing the proper
Hittite has dividers (prescalers) that go to 18 GHz:
http://www.hittite.com/
I have a couple of samples of the :8 that goes to 12 GHz, precisely to
try and phase lock a Gunn, which I have not used yet (another long
winter project that won't happen as long as I am in Florida :-)
Didier
Normand
Rick,
If you are talking about injection locking, that will probably not be
practical. The Gunn is not stable enough (not the Gunn itself, but the
cavity where it will be installed) to stay close enough to the right
harmonic to stay locked, and the high order difference between the gunn
and
John Miles described a clean 110 MHz PLL from a 5.5 MHz source, which he
used in his tracking generator project.
http://www.thegleam.com/ke5fx/tr503.html
It could be easily adapted to a 100 MHz output from a 10 MHz input.
An alternative to a PLL would be a frequency multiplier, if the original
You have to be careful with the 10 kHz output. The output is only
updated once per second (the 10,000 pulses in the 1 second period are
equally spaced), so you still need the same filter as if you were using
the 1 PPS output. I am not sure what the 10kHz output was intended to,
but it's not
Don't do that over my house :-)
Didier
Tom Van Baak wrote:
Yes, and instead of dropping sand to keep aloft
over time I could drop the lead acid batteries as I
use them up!
/tvb
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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
Looking at the Thunderbolt manual, I came across this:
quote
It is important to remember that any real-time UTC is actually a
prediction of UTC.
The official UTC time is published approximately one month after the fact.
/quote
It makes sense that real-time UTC is a prediction, since UTC is the
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
As much as I believe there should be a place and appropriate recognition
for anyone who has shown dedication to the art of time keeping,
regardless of the technology employed, I remind you of the bylaws of the
time-nuts group:
/quote
Time-Nuts/ is a mailing list for amateurs who are interested
Well, I am sorry to report that you failed this simple test: you need an
*abacus* of course :-)
(an abacus with statistical functions helps, but I have not seen one, or
maybe a programmable abacus...)
Didier KO4BB
John Ackermann N8UR wrote:
Didier Juges said the following on 11/05/2006 09
I had to stack up frequency counters on top of frequency counters (to
measure time difference and each input frequency simultaneously - 3
counters) and the last one on the top, a HP 5334B, was fairly high and
just about level with the antenna, about 2 feet away. I found out that
if I stood in
Ulrich Bangert wrote:
Hi Didier,
you may use the DRIFT section of the graphic editor of PLOTTER to remove
a phase drift due to a constant frequency offset as seen in this data,
with the result that you get more visual resolution out of it, as in
the attached PDF.
73 de Ulrich, DF6JB
John Ackermann N8UR wrote:
To minimize jitter and tempco, you probably ought to stay away from a
comparator if you can. I've had good success using the input circuit
from Brooks Shera's GPSDO which is a 74HC4046 PLL, but using only the
input circuit and not the PLL section itself.
Magnus Danielson wrote:
Look at the AD8561 datasheet first. The 74HC4046 is much slower than the
AD8561 and the higher output slewrate of the AD8561 is certainly good to keep
jitter down. The 74HC4046 is worse for that aspect.
What I would rather critize Didiers schematic for is the lack of
There are sudden increases in noise (bursts that last from seconds to
minutes) on the plots I posted.
I believe the sudden and drastic increase in noise at times comes from
the GPS loosing lock. At the moment, I cannot hook up the computer to
the GPS and verify, but I will do that later.
In
kd7ts wrote:
Didier Juges wrote:
There are sudden increases in noise (bursts that last from seconds to
minutes) on the plots I posted.
I believe the sudden and drastic increase in noise at times comes from
the GPS loosing lock. At the moment, I cannot hook up the computer to
the GPS
Dr Bruce Griffiths wrote:
Didier
Alternative GPSDO solution
Divide the 10MHz reference by 32 resync the output to 10MHz with a fast
D flipflop and then divide the D flipflop output by 4 using a 2 bit
switchtail ring (Johnson) counter.
Low pass filter the outputs of both divide by 4
I moved the GPS antenna as high as I could in the shack (instead of on a
shelf at eye level) and it seems to have significantly improved the signal.
Here is the latest plot of the HP10811 against the GPS, unlocked.
http://www.ko4bb.com/Test_Equipment/HP10811-GPS-10-29.png
(sorry the screen
It is back to the previous method of sending a clean CW signal.
I did not participate previously, so I have no experience with the test.
If I understand correctly, they will transmit on all 3 frequencies
simultaneously, but we are supposed to measure only the specific band
they announce at a
[EMAIL PROTECTED] wrote:
Hi Didier...
The official readings are taken for the band that is announced.
Even though the exciters at W1AW are left on for an extended period of time
before the test, there is some drift during the
test period.
I would suggest that you listen on 160
It seems obvious that's what hapenned, but I am still curious about the
temperature variation. Must have been the coax cables difference in
length going to the two inputs. Temperature affected the delay.
The resolution of the 5370 is quite amazing.
Thanks for the comments and the software.
I have downloaded and installed Plotter, and found it easy to setup and use, at
least for basic functionality. The menu threw me off a little bit (no simple
File-Open dialog), but I am sure I will get used to it.
I have ran my spare HP10811 overnight (twice), against the HP5370A's own
Dr Bruce Griffiths [EMAIL PROTECTED] wrote:
The apparent behaviour of your 10811's is far too good!!
Over a period of 15,000 seconds the allan deviation should have reached
a minimum and then increased as the effects of ageing manifest themselves.
Either the oscillators are
Tom Van Baak wrote:
Since I have only one readily accessible spare OCXO at the moment and I
want to get the procedure right before I take anything else apart, I
will feed the output of the 10 MHz reference from the 5370 into the
START channel, and my DUT into the STOP channel and select SEP
Hi Ulrich,
comments are embedded:
Ulrich Bangert wrote:
the Datum LPRO User's Guide / Installation Guide discusses some methods
of sine to square wave conversion in terms of lowest phase noise.
This is good to know. Do you have any suggestion how I might get a copy
of the relevant pages
Hi Tom,
comments are embedded:
Tom Van Baak wrote:
Didier,
I've been out of town and I see a flurry of postings to
your original query about Allan deviation. It sounds
like your goal is to measure the stability of various
oscillators that you have lying around?
That's what happens when
Here are my $0.02...
Magnus Danielson wrote:
From: Dr Bruce Griffiths [EMAIL PROTECTED]
Subject: Re: [time-nuts] How to measure Allan Deviation?
Date: Tue, 24 Oct 2006 10:52:21 +1300
Message-ID: [EMAIL PROTECTED]
Tom
Hi Bruce,
In comparing 2 oscillators do you mean
1)
Dr Bruce Griffiths wrote:
Didier
Did you get my comment on HP5370A differential linearity errors.
It made it to the list but I didn't receive a bounced copy.
Bruce
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Dr Bruce Griffiths wrote:
Didier Juges wrote:
I do not understand the signal on the rear trigger outputs. At the
moment, I have a single 10 MHz sine signal fed to the START channel, and
the 5370 is set to TI, MEAN, SAMPLE SIZE 1, + TI ONLY, START channel
triggers on rise and STOP
Hi Bruce,
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Dr Bruce Griffiths wrote:
Didier Juges wrote:
I do not understand the signal on the rear trigger outputs. At the
moment, I have a single 10 MHz sine signal fed to the START channel, and
the 5370 is set
Hi John,
I got zip (does not work either :-)
I remember going through something like that a while back on one of my
servers, I have no recollection how I fixed it :-(
The files look pretty small, can you email them to me?
Interestingly, on my ISP's server (Linux too), I have no problem
Dr Bruce Griffiths wrote:
Reading between the lines on the Jupiter GPS receiver datasheet it would
appear that the 10KHz output is phase modulated at 1Hz to realign it to
successive PPS output pulses. As the PPS jitters about so does the 10KHz
signal.
Most GPS receivers with higher
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Dr Bruce Griffiths wrote:
In principle this measurement could be made with a time interval counter:
PPS - START
delayed 10KHz - STOP
Vary the delay and watch the jitter jump when the leading edge of the
PPS signal occurs during
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Dr Bruce Griffiths wrote:
In principle this measurement could be made with a time interval counter:
PPS - START
delayed 10KHz - STOP
Vary the delay and watch the jitter jump when the leading edge of the
PPS signal occurs during
Bruce,
Thanks for the reminder. That was my intention. I was planning to use a
74HC74, and whatever dividers I can get my hands on. I am not looking
forward to daisy chain seven 7490s, so I will probably try something
else. With the D flip-flop, the dividers don't really matter, as long as
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Dr Bruce Griffiths wrote:
In principle this measurement could be made with a time interval counter:
PPS - START
delayed 10KHz - STOP
Vary
OK, here is my problem. I do not think it is a unique problem, based on
recent mail :-)
I have read about the Allan Deviation and I understand the principle,
even though the nuances between the 3 basic Allan deviations escape me
at the moment, but I am sure it will come once I re-read the Help
My kind of guy :-)
Congratulations!
Reminds me a long time ago when building 120 audio amplifiers as part of
a college hobby gone crazy, I had laid out my PWB for mini-DIP (DIP8)
op-amps (uA709, because that's all there existed back then), with the
frequency compensation caps at each end of
Many CMOS chips draw higher supply current with floating inputs, as the
internal buffers may bias themselves in the middle of the range, where
both transistors are turned on. That may lead to increased temperature
and failure over time. In many cases, floating inputs will simply toggle
as a
I had planned to participate the last 2 years, but got distracted both
times. Hopefully, this year will be the charm :-)
I better have my GPS stabilized clock working by then (to drive the HP
3586A receiver, and the HP 3570A counter for the decoded audio), no more
excuses...
Interestingly,
John Miles ([EMAIL PROTECTED]) on hp_agilent_equipment (yahoo) has a lot of
experience with the 8568 and 8566 analyzers and is probably your best
opportunity to find what you need. I know he had an 8568 which he sold,
but not before copying the EPROMs.
Didier KO4BB
Poul-Henning Kamp wrote:
Bruce,
Thanks for the explanation, and you were right on the money. It looked
like one of the tuning caps was open, funny that it resonated so close
to 30 MHz. I reflowed the solder joints on the two 500pF capacitors
(even though they looked fine under the magnifier) and voila, Bob's your
I got an HP 5370A from eBay which did not work at power up (display was
messed up). After resetting all the ROMs and the CPU in their sockets,
the instrument came to life and now powers up without error message. It
has serial number 2128A01306.
However, it seems that the reference oscillator
Eric,
This is probably too old to be useful, but I have the 371 Source Locking
frequency counter service manual on my web site at
http://www.ko4bb.com/ham_radio/Manuals
This manual was courtesy of Had, K7MLR
Didier KO4BB
Eric Haskell wrote:
I purchased a broken EIP 575 Source Locking
Over that time period, maybe a calendar :-)
Didier
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Bill Hawkins writes:
Since control is not precise, the subject is probably off
topic for this list.
It all depends on your integration time.
I was told from Stockholm that
Hello fellows Time Nuts,
Following a question of mine here a few weeks ago about using a video
distribution amplifier for frequency reference distribution, and lots of
good advice I got in response, I just got one of those distribution
amplifiers from eBay and there are good news. The box is
The first phone I had where I observed the time zone error, after the
plane had landed in a new time zone and the phone had not been turned
off during the flight (and no, the plane did not crash, not that time)
was an Alltel phone. Alltel uses CDMA.
Again, this was just an observation.
I
I have observed that some cell phones set their clock when you power
them up, and others set it at regular time. Some automatically change
time zone as you travel and some don't, maybe due to the same process.
Didier KO4BB
Glenn wrote:
_Most_ cell phones set their time to network time.
It is reasonable to use a standard video distribution amplifier to
spread the good 10 MHz from a stable reference generator?
It seems those provide moderate (usually adjustable) amplification,
isolation of the various outputs (even though they do not have ground
isolation) and should be
If you send me a copy, I'll put it with the other manuals at
http://www.ko4bb.com/ham_radio/Manuals
Didier KO4BB
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Juerg Koegel writes:
Hello Magnus
I have the manual for the HP J06-59992A and I can you send a copy as a pdf
file.
Hi Richard,
Thanks a lot for the very detailed explanations. I was not sure after
looking at the PIC assembly code. I have never used PICs and even with
my favorite micros (6805 and now 8051) I try to stay away from assembly,
it's not as much fun as it used to be, now that I am used to C, even
keep that edge the way it is and then invert the 1PPS from
the DUT, if this is possible.
Also, at least with my Jupiter receiver, the 1PPS is a fairly short
pulse, not nearly 50% duty cycle, so inverting it might not give much
improvement.
Any thoughts?
Didier
Didier Juges wrote:
Hi Richard
How do you measure the averaging time? Should we 1) measure the actual
time that the phase data is being read (as I understand, that would be
accumulating the time that the phase comparator output is high) and stop
when we reach a certain count/time, or should it be 2) just elapsed time
Hi Richard,
Thanks a lot for the information, your email hit me at exactly the same
time as the one telling me I won a HP 5316B time interval counter on
eBay :-)
(Could not find a 5370 I could afford...) (I have waay too many counters
right now, but only one with TIM _and_ GPIB...)
Thanks a
Hi Said,
Thanks for the info, I did check the Philips (and Sparkfun) web site(s)
and I must admit the ARM chip is cheap and has impressive
specifications. With the GNU tools, I know it will work and it will fit
my homebrewer's budget :-) I used to consider $99 for a development kit
cheap, but
I have used a number of pll controlled microcontrollers, and I would not
recommend using one of those in a timing application such as those
discussed here.
These PLLs are generally not very clean spectrally (it's actually a good
thing for EMI, some chips have purposeful spread spectrum clocks)
Chuck Harris wrote:
The answer to that problem is to use the 90 day limit on posting feedback
to your advantage. If you need to post a negative feedback, wait until the
last minute, and post away. By the time the seller finds out, it is too late.
I should mention this to the author of the
Keeping time with a single Mercury atom?
How come I did not hear about it here first? :-)
Didier KO4BB
http://blogs.zdnet.com/emergingtech/?p=293
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I agree with that. I have an HP 3586A Selective Voltmeter and it has the
LO output on the rear which covers 0-32 MHz. I wish there was a
programmable attenuator on this output as it is exceptionally clean
spectrally. Of course, there is no modulation capability.
Didier KO4BB
Magnus Danielson
Water vapor is actual water, simply in gas form, so if the temperature
drops quickly after a high humidity day, the vapor inside the bag will
condense before it has time to escape and you will get actual water in
liquid form in the bag, in the form of condensation.
Easy to do in Florida,
John,
What do you do with the time interval function?
I have an Advantest (actually Takeda Riken) TR 5823H counter that has
time interval functionality with 0.1nS resolution. How can I use that to
sync an HP 10811-60102 VOCXO to a Jupiter GPS receiver?
The TakedaRiken manual is pretty
Thanks John,
That makes sense. I tried feeding the 10 MHz of two HP synthesizers and
got useless results. Now I see why. I understand that using the 1 pps
output makes more sense.
If my counter had the a/d output, I would be very close to having all I
need to synchronize the VCXO to GPS...
I have shipped a number of heavy and fragile items via the local UPS
stores (there were 2 local stores here, now down to one). I have always
let them pack the heavy items (and paid for the service). They do a good
job and I have sold a number of scopes and other heavy instruments
(spectrum
The local UPS store uses peanuts (and bubble wrap) only below 15 lbs or
so. Above that, they use crushed paper after wrapping the item in 3
layers of heavy duty bubble wrap. They make sure there is at least 3
inches of clearance after the bubble wrap in the final box and stuff the
space with
Thanks for the stats. That prompted me to look at my own stats, just to
make sure... This is a little OT, but I promise I wont do it again for a
while :-)
Rob's briefing (and a number of manuals) is also hosted at
www.ko4bb.com/ham_radio/Manuals/GPS_Stuff
I have provided 5.3 GB of data this
Rob,
Could you upload it to ftp.ko4bb.com, login: manuals, password: manuals
so I could put it with the other manuals at www.ko4bb.com/ham_radio/Manuals?
Thanks in advance
Didier KO4BB
Rob Kimberley wrote:
I have a 75 page PDF briefing from Zyfer on SAASM P/Y which has loads of
useful
Na, rain drops in Seattle are usually small, compared to these big
buckets we get down here in Florida :-)
Not unusual to see 3 to 6 inches/hour of rain over a short period of time.
That's the way it feels too if you are out when it happens...
Didier KO4BB
David Forbes wrote:
Google led me to
I had to look for that info:
Here we go, this chart
http://www.met.utah.edu/jhorel/html/wx/climate/normrain.html says
Pensacola (40 miles to my west) gets 62 inches annualy.
Surprisingly (to me), the land record (excluding the Pacific islands)
goes to Yakuta, AK with 151!!!
No GPS controlled
I have access to a nice scanner/copier that does (black and white)
double sided scanning through the document feeder. If you have the
magazines cut (so I just have to put them in the machine), and send them
to me via mail, I will send you back pdfs at your resolution of choice.
Didier KO4BB
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