Navicom is a Korean GPS manufacturer.
So if you look at their web site at navicom.co.kr or
http://www.hanyangnav.co.kr/en/product/product_a_item.asp?pcode=139 you
will find the spec of the Saturn.
If I remember correctly are Navicom in some way connected to Oscilloquartz
so their products
Wow - that's a nice set. I wonder if its really NOS (new old stock)
as advertised - the jacket of one book looks more faded than the
others. I picked up a set that is pieced together (some ex-library) a
few years ago for $500. People (family) give me crap about it as a
waste of money and nerdy,
Thanks for the input. I think i am asking for too much in one package (looking
toward future projects). How about 1.8Mhz to 15Mhz To meet the needs of
the primary project (fmt). I would prefer to not have to also use a counter.
Thanks,
Doc
KX0O
Sent from my iPad
On 7/12/2011 at 9:04 PM Bill Dailey wrote:
Ok, I have a dds receiver locked to a gpsdo, the radio can only be tuned
in 1 hz increments but should be dead on. I can feed the passband into
speclab via VAC and measure a carrier OTA. No problem there...can get
decent resolution but there is
hp3335 then as I sent last night
On Wed, Jul 13, 2011 at 8:38 AM, Bill Dailey docdai...@gmail.com wrote:
Thanks for the input. I think i am asking for too much in one package
(looking toward future projects). How about 1.8Mhz to 15Mhz To meet the
needs of the primary project (fmt). I
On 7/13/11 5:55 AM, paul swed wrote:
hp3335 then as I sent last night
or 3325... we use a lot of them at work. takes a 10MHz input, settable
to microhertz, etc.
On Wed, Jul 13, 2011 at 8:38 AM, Bill Daileydocdai...@gmail.com wrote:
Thanks for the input. I think i am asking for too
Bill
I agree with what you say. I am a fan of Brook Shera's loop and have
used it with a Rb and between a Rb and a D 1000. I did modify the input to
fool it to get smaller steps and the only problem is the AD 1861.
Availability is not the problem, they are readily available at a price much
Bill,
Well, if the frequency you want is below 10 MHz, then the counter/readout
on a HP 3335, as Paul mentioned, will reach the 100 millihertz range, as
it's readout is 8 digits, I think. That is anything from say 9.99 MHz and
below, the resolution will go up from there, but to be honest, I can't
there is a Yahoo Group, MIT-Rad-Lab-Books where you might get lucky on the
missing volumes.
There was a complete, scanned set on two CDs around also. The copyright
status is unknown though.
Oh, the books do also cover LORAN (but -A not -C).
-John
Wow - that's a nice set. I
If not wanting to use an external counter, with a continuously variable
generator, the HP 3335 or 3325B would be good try out. I also think I saw a
3335A, on ebay, for around $375 to $400, in good shape, the other day.
Also, there's a difference between the 3325A and 3325B's frequency step, if
I
On 7/13/11 6:55 AM, J. Forster wrote:
there is a Yahoo Group, MIT-Rad-Lab-Books where you might get lucky on the
missing volumes.
There was a complete, scanned set on two CDs around also. The copyright
status is unknown though.
Have to check for sure, but they might be non-copyright. Were
Hal,
I believe by default the maxpoll is 10 (1024 seconds / ~17min)... If you
manually set each server in your config I think the max
setting can be as high as 14 or 17 (maybe higher?), which can bump it into the
hours / days range... Even just a bump to 12 would
give you a little over an hour
I worked at MIT in the Research Lab for Electronics (RLE) and the Physics Dept
from 1960 to 1968. When the RLE Library was downsizing they pitched several
complete sets of the Rad Lab Series. At the time I was not into old books .
73, Dick, W1KSZ
-Original Message-
From: J. Forster
Thanks
Yup CDs at a reasonable cost would be interesting. Granted a pain to read
but this is really just out of interest and history.
Though I have seen some really poor jobs of encoding.
By the way I have enjoyed skimming through the LORAN A radlab doc.
I'll have to try a google search and see
That is apparently the case for the HC books.
I'm not so sure about the CDs. A friend who is an IP attorney has told me
that if you scan something, you cannot copyright the scan. You can
copyright any new content you add.
FWIW,
-John
On 7/13/11 6:55 AM, J. Forster wrote:
The original series was copyrighted 1947 by McGraw-Hill Book Company. The
agreement with the government was the copyright would later be lifted. I
know in 1964 the grey colored small size book series were printed by Boston
Technical Publishers, Inc. with no copyright.
John WA4WDL
I just ran into one of our attorneys in the hallway. Copyright refers to
the intellectual property, not to the medium. The fact that the
intellectual property of the author is moved from a book to a CD does not
affect copyright, so long as the content is not otherwise altered. Think
about it;
On 7/13/11 8:02 AM, J. Forster wrote:
That is apparently the case for the HC books.
I'm not so sure about the CDs. A friend who is an IP attorney has told me
that if you scan something, you cannot copyright the scan. You can
copyright any new content you add.
And you could copyright the
I use the HP 3336 for this kind of work. Mine is the 3336C (50 ohm and 75 ohm
outputs). Micro-Hertz resolution up to 100 KHz and milli-Hertz resolution up to
21MHz. Auxiliary output up to 60MHz on the back. Tons of digits on the display,
-72dBm to +7dBm amplitude range, vernier (unlike the
On 7/13/11 8:05 AM, jmfranke wrote:
The original series was copyrighted 1947 by McGraw-Hill Book Company.
The agreement with the government was the copyright would later be
lifted. I know in 1964 the grey colored small size book series were
printed by Boston Technical Publishers, Inc. with no
In message 4e1db79a.9030...@earthlink.net, Jim Lux writes:
On 7/13/11 8:02 AM, J. Forster wrote:
Walnut Creek CD-ROM is, I believe, a poster child in the case law,
although I can't remember if they were the plaintiff or defendant, or
just how it all worked..
As far as I recall, they were
In message 1530.12.6.201.127.1310569355.squir...@popaccts.quikus.com, J. For
ster writes:
I'm not so sure about the CDs. A friend who is an IP attorney has told me
that if you scan something, you cannot copyright the scan. You can
copyright any new content you add.
You can copyright a collection
On 13 July 2011 14:20, Mike Feher mfe...@eozinc.com wrote:
A guy is offering a complete set item # 320727122967 on eBay. I already have
one complete set and lots of duplicates, otherwise I would jump at it. I
like the hard copy a lot better than trying to read them on-line. Regards -
Drat!
I left out something. The question about scanning concerned originally
uncopyrighted material, like military instruction manuals.
My guy concluded, if the original was not copyright, a CD version of it
could not be copyright, except for any added new material.
-John
I just
Just got this in an e-mail from Tektronix. Shame they're all pdf, instead
of printed and mailed out though.
The Oscilloscope Reference Kit is back by popular demand. Developed by
Tektronix engineers and scope experts, the kit covers everything you need
to know about oscilloscope theory and
On 07/11/11 01:25 AM, Will Matney wrote:
David,
The FE-5680A is always plentiful, and a lot of them are generally mounted
on a PC board, from pulls, along with having a decent price. The main thing
is availability, which means spare parts if you need them. I also know that
I've seen these used
Hello Will
I have enjoyed reading your e-mails and the info about the various
generators. Have you considered using one of the PTS series of generators?
Wavetek and several others also had their version such as the wavetek 5120A
which covers from .1Hz to 160Mhz with the output variable.
David,
That's not a bad price for two in good shape. They generally supply the
connector with these, with the leads cut off at about 2 inches long. I just
stripped them, and soldered new leads to them, and then used heat-shrink
over the joints. After I got mine up and running, I calibrated it
It's a shame Tek doesn't make good 'scopes any more.
-John
==
Just got this in an e-mail from Tektronix. Shame they're all pdf, instead
of printed and mailed out though.
The Oscilloscope Reference Kit is back by popular demand. Developed by
Tektronix engineers and scope
On 7/13/2011 8:28 AM, Poul-Henning Kamp wrote:
PS: http://www.bunkerofdoom.com/lit/mitser/
Thank you for that link Poul-Henning, I had not turned that up in my
searches. It's nice to have it available, even if some of the pictures
have gone all black and can't be read. But the price is
The copyright lapsing after 10 years statement is in the front of most of
the red version of the books.
-John
On 7/13/11 8:05 AM, jmfranke wrote:
The original series was copyrighted 1947 by McGraw-Hill Book Company.
The agreement with the government was the copyright would
Dan,
I set up the MIT-Rad-Lab-Books Group on Yahoo to address precisely that
issue... the poor quality of the image scans.
Our hope was (and still is) to rescan the images in the original books and
replace the poor scans with better quality, more useful, ones.
Best,
-John
All,
This is OT, so if you would, please e-mail me direct on this.
I have an ESI (Electro Scientific Industries), model PVB 300 portametric
voltmeter bridge, and am looking for a good schematic or manual on it. I
have the manual from Bama, but the problem is, I despise the schematics
that use
Bill,
One method I've found convenient is to use a DDS Development kit such as
the AD9852 one and drive that from a Rubidium or GPSDO source. I have a
60MHz FEI-5680B driving mine and easily get 0 - 200MHz out. No, it won't
give all the range you want, but there are few alternatives that will,
John,
Who makes the best ones? Agilent?
For my piddling purposes, my little Rigol is fine. Just wondered what you
big guns prefer.
Bill
On Wed, Jul 13, 2011 at 12:56 PM, J. Forster j...@quik.com wrote:
It's a shame Tek doesn't make good 'scopes any more.
-John
==
On my bench I have both a Tek MSO72004 and an Agilent DSA91304, I
still prefer the Tek. but Agilent is gunning for Tek HARD. and Tek may
not hold the crown long.
On Wed, Jul 13, 2011 at 11:38 AM, William H. Fite omni...@gmail.com wrote:
John,
Who makes the best ones? Agilent?
For my
On 07/13/11 04:56 PM, Dr. David Kirkby wrote:
I've got a Kenwood TS-940S transceiver with the rare SO-1 TCXO
installed. According to the spectrum analyser, that is about 40 Hz off,
but I've no idea how much of that difference is due to the transceiver
or HP10811A oscillator in the analyser.
Bill,
You are reading John's statement incorrectly. He is saying that all of these
guys that are scanning copyrighted (or public domain) material are not eligible
for a copyright just for doing the scanning That would be like the saying
the
company that makes the printer (let's say Xerox)
There is an oops, Chuck, otherwise yes.
-John
===
Bill,
You are reading John's statement incorrectly. He is saying that all of
these guys that are scanning
un-
copyrighted (or public domain) material are not
eligible
for a copyright just for doing the
Thanks, Chuck, and sorry, John. I did, indeed, misunderstand and you are
entirely correct.
Bill
On Wed, Jul 13, 2011 at 3:13 PM, Chuck Harris cfhar...@erols.com wrote:
Bill,
You are reading John's statement incorrectly. He is saying that all of
these
guys that are scanning copyrighted
In message 4e1dee43.3070...@erols.com, Chuck Harris writes:
I can conceive of a case where a publisher like McGraw-Hill's copyrighted book
full of public domain IP could be copied if you used your own type font, and
formatting of pages, pictures and text, etc...
Yeah, well, maybe...
The crux of
Of course. As yet we haven't (I think?) awarded any copyrights, or other
rights, to machines for their artistic abilities.
-Chuck Harris
Poul-Henning Kamp wrote:
In message4e1dee43.3070...@erols.com, Chuck Harris writes:
I can conceive of a case where a publisher like McGraw-Hill's
Any OCR I've seen would take a lot of human intervention, even with a
clean original.
-John
=
In message 4e1dee43.3070...@erols.com, Chuck Harris writes:
I can conceive of a case where a publisher like McGraw-Hill's copyrighted
book
full of public domain IP could be copied if
Mandelbrot (? Sp) Sets?
-John
==
Of course. As yet we haven't (I think?) awarded any copyrights, or other
rights, to machines for their artistic abilities.
-Chuck Harris
Poul-Henning Kamp wrote:
In message4e1dee43.3070...@erols.com, Chuck Harris writes:
I can conceive of
In message 2272.12.6.201.69.1310585470.squir...@popaccts.quikus.com, J. Fors
ter writes:
Any OCR I've seen would take a lot of human intervention, even with a
clean original.
That's probably not true.
The point being that you will not notice the results of really good
OCR, you only notice
Chuck,
If the work is still under a copyright, and you copy it by hand, or type
it, word for word, changing the font, layout, etc., they still consider it
plagerism, and it's still a copyright infringement. About all you can get
by with is quoting something you read, and then you are supposed to
All,
I forgot to add this earlier today, while discussing this. When most
anything is calibrated at a cal lab, lets say you have something that is
supposed to be calibrated 10 MHz, then, they will generally set this at
9.999 MHz, or 1 millihertz below the stated value, and they do this
over
Thanks, I knew I had seen the statement concerning the copyright before. I
gave a set, missing only two volumes, to a museum out west. I still have one
or two volumes around her somewhere.
Thanks,
John WA4WDL
--
From: J. Forster j...@quik.com
If an old random 10 MHz Rubidium oscillator is working (i.e. powers up, and
eventually locks), what is the maximum possible frequency error it could have?
Could it remained locked with an error of 1 part in 10^7, 10^8, 10^9, 10^10 etc?
I assume there are physical limits which would simply stop
David,
That's a good question, and I wouldn't be able to say, without seeing the
spec sheet on the oscillator itself. Out of lock would be out of
tolernace, but what the maximum allowable deviation is, on the unit in
question, I wouldn't know. If it does finally lock, it should be within
Could it remained locked with an error of 1 part in 10^7, 10^8, 10^9, 10^10
etc?
I assume there are physical limits which would simply stop it functioning
too far from the correct frequency, but don't have much clue what they are.
You might find the answer by reading between the lines on a
Hi
For most Rb's most of the time, the answer is a few ppb (like say +/-3 ppb).
Unfortunately there's no guarantee that it will fail to lock even with low
probability / crazy stuff wrong. That opens up the window a bit...
Bob
On Jul 13, 2011, at 5:15 PM, Dr. David Kirkby wrote:
If an old
David,
Below is a link to the datasheet on the FEI 5680A. I hope it will work with
those %20 in the link. If not, I think there simply blank spaces, or /FEI -
5680A.pdf
http://www.gillam-fei.be/products/pdf/others/rubidium/FEI%20-%205680A.pdf
Best,
Will
*** REPLY SEPARATOR
Here is another link to the catalog on these FEI standards, and it has info
that the datasheet leaves out, especially on operation.
http://www.freqelec.com/pdf/rfs_12pg.pdf
Best,
Will
*** REPLY SEPARATOR ***
On 7/13/2011 at 6:27 PM Will Matney wrote:
David,
Below is a link
On 07/13/11 11:27 PM, Will Matney wrote:
David,
Below is a link to the datasheet on the FEI 5680A. I hope it will work with
those %20 in the link. If not, I think there simply blank spaces, or /FEI -
5680A.pdf
http://www.gillam-fei.be/products/pdf/others/rubidium/FEI%20-%205680A.pdf
Best,
David,
The answer to your question is quite complex. A number of factors control the
operation of a passive atomic resonator acting as a filter. Temperature,
pressure,
buffer gas mixtures, external magnetic forces, coupled light excitation, the
length
of the cavity, the interrogating external
I think it's more in who had them and tried to calibrate them, as some of
these are actually programmed for the desired frequency. I forget which pin
that is, but I think it may show it in one of the pdfs. There's another pdf
available out there from a ham who did a lot with these, and it did show
Here's a link to the other pdf that I spoke of on the programming. It goes
into some of the same, but it does have other info.
http://www.dd1us.de/Downloads/precise%20reference%20frequency%20rev%200_4.pd
f
Best,
Will
*** REPLY SEPARATOR ***
On 7/13/2011 at 8:06 PM Will Matney
Will,
Did you actually read what I wrote ? I ask because your response, below, would
suggest a low comprehension rate. I noted a number of your responses fall into
the same category. Such responses, having no substantive material, do nothing
but add noise to the list. This list is suppose to
This is a very interesting question, same as if someone can't
afford a GPSDO, Cesium or other time-nutty contraption, but buys a
second-hand, uncalibrated Rubidium as his primary timebase, how accurate
would it be?
One whole class of units, the 'programmable' or 'synthesized'
FYI..
Don,
W4WJ
_Click here: Spectracom 8195B, Ageless Oscillator GPS Freq Standard |
eBay_
(http://cgi.ebay.com/Spectracom-8195B-Ageless-Oscillator-GPS-Freq-Standard-/260814440498?pt=BI_Cellular_Optical_Television_Test_Equipmenthash=item3cb9
c08832)
On Wed, Jul 13, 2011 at 7:10 PM, Jose Camara camar...@quantacorp.com wrote:
This is a very interesting question, same as if someone can't
afford a GPSDO, Cesium or other time-nutty contraption, but buys a
second-hand, uncalibrated Rubidium as his primary timebase, how accurate
would it
Hi All,
I've just realised I don't understand something. Something quite basic.
Primary Standards are ones which don't have to be calibrated against others.
My understanding is that Caesium and Hydrogen masers are Primary Standards
(in our field).
Secondary Standards are calibrated against the
Jim,
It is my understanding that the government standard offices around the
globe, like NIST, calculates time by the earths rotation, I guess you could
say, the old way, or using astronomy, but with this, they use things like
the decay factors of atomic materials to keep this time. If I recall,
FYI...
Old School Freq Standard!!
Don,
W4WJ
_Click here: MINT HALLICRAFTERS HT7 FREQUENCY STANDARD HAM RADIO N.R |
eBay_
(http://cgi.ebay.com/MINT-HALLICRAFTERS-HT7-FREQUENCY-STANDARD-HAM-RADIO-N-R-/270781985069?pt=LH_DefaultDomain_0hash=item3f0bdd312d)
No. The standards of time interval are atomic, not linked to the Earth's
rotation. Hence Leap Seconds.
-John
==
Jim,
It is my understanding that the government standard offices around the
globe, like NIST, calculates time by the earths rotation, I guess you
could
say, the
Calculations indicate that by changing the distribution of Earth's mass,
the Japanese earthquake should have caused Earth to rotate a bit faster,
shortening the length of the day by about 1.8 microseconds.
http://www.nasa.gov/topics/earth/features/japanquake/earth20110314.html
Will
On 7/13/11 12:13 PM, Chuck Harris wrote:
I can conceive of a case where a publisher like McGraw-Hill's
copyrighted book
full of public domain IP could be copied if you used your own type font,
and
formatting of pages, pictures and text, etc...
This is precisely the case with West Publishing
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