have an Oncore or a DCF77 receiver I am stuck. Is
it possible to use just the PPS/DCD line on its own for the fraction of the
seconds, or would I need one or other of those receivers to make it work?
If it can be made to work, what are suitable configuration commands?
Thanks,
David
--
SatSignal
using NTPns and not stock
NTP.
I appreciate the requirements for an accurate PPS source - this should be
within a microsecond to start with, and then I may try a more accurate
source (I have a couple of GPSDOs).
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
it to someone who is
interested!
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk
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that will help push quantum tech from lab to
market.
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk
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To answer which North, it is True North, not Magnetic. Orbits,
including GPS, are specified relative to the geographic pole. Magnetic
North moves noticeably over time and place. True North moves somewhat
over time but only very slightly.
David
On 12/15/14 9:05 PM, Jim Lux wrote:
On 12/15
I have a couple of Rb sources bought from China or Hong Kong a year or
two ago. I'd like to fix these up. Initially in a box where I can
adjust them to frequency manually, but perhaps later lock them to GPS.
Looking around the web, there are countless options on these things,
and different
On 16 December 2014 at 12:16, Bob Camp kb...@n1k.org wrote:
Hi
One fairly important issue - the unit needs to be on a heat sink. If you run
it without cooling of some sort, it will not run for very many years.
Bob
I do realize that, but how big? Normally the bigger the better is
not an
On 16 December 2014 at 13:18, Bert Kehren via time-nuts
time-nuts@febo.com wrote:
I suggest you go to http://www.febo.com/pipermail/time-nuts/ back a couple
of years and you will find every thing you ever want to know about the FE
5680A. Similar to the recent Lucent activity
Bert Kehren
I
On 16 Dec 2014 23:06, Bob Camp kb...@n1k.org wrote:
Hi
What ever you do, take the extra step of checking the baseplate
temperature once you have things up and running. The Rb’s will *work* over
a wide temperature range. The region over which they will last a long time
is a bit more narrow. I
with a PPS/DCD over USB connection.
http://www.satsignal.eu/ntp/NTP-on-Windows-serial-port.html#usb
I may have been lucky with the particular serial-USB converter, though.
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay
On 14 Dec 2014 02:12, Adrian rfn...@arcor.de wrote:
Same here. I have a Z3805A from this vendor that works flawlessly, and I
know of other people that purchased from him without any problems.
To call it a cam when a HP unit comes with a remanufactured box is quite
a harsh statement, IMHO.
On 14 Dec 2014 08:07, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
If the boxes had Yixun Electronics or similar printed on the rear I
would not have a problem with him putting the electronics in new boxes,.
But clearly there is an attempt to deceive people
Both my computers run Solaris.
* One, a Sun Ultra 27 has a Xeon processor, no serial ports, but I do have
a good quality USB serial adapter for it.
* The other, a Sun Blade 2000, has a SPARC processor a 25 pin serial
port.
I am using the Sun Blade 2000 to talk to the HP now, but I don't run
On 14 December 2014 at 11:57, Hal Murray hmur...@megapathdsl.net wrote:
drkir...@kirkbymicrowave.co.uk said:
Can anyone advise if this is possible, and if so what software is needed?
Any idea what sort of accuracy would be achievable?
I'm not familiar with Solaris. I've never worked with a
On 14 December 2014 at 12:39, Neil Schroeder gign...@gmail.com wrote:
Based on my recent testing - including Solaris - you will be better off
with the Internet unless your USB adapter is far better behaved than the
several I have here
The USB - serial adapter I have is an Keyspan USA-19HS
On 14 December 2014 at 13:37, bownes bow...@gmail.com wrote:
On Dec 14, 2014, at 07:42, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
On 14 December 2014 at 11:57, Hal Murray hmur...@megapathdsl.net
redacted
That command works.
How do you reboot - apart
On 14 December 2014 at 02:31, Bob Camp kb...@n1k.org wrote:
Hi
You see a lot of surplus HP gear with the feet pulled. That was pretty
standard when gear was rack mounted.
Bob
There are not the usual 3 holes underneath where feet go.
I would nice to be able to find a few photos of a real
the SS in the 58503A works the same was as SS in the
59551A, then it looks like I have 6 satellites which are not weak. But
that is a big IF
Does anyone have an HP manual for the 58503A?
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd
On 14 December 2014 at 19:32, Bob Camp kb...@n1k.org wrote:
There are not the usual 3 holes underneath where feet go.
I understand that they are different. The problem is the same though. Pulling
a box in and out of a rack with feet or bumpers on it is a pain. They often
get “lost” early
On 14 December 2014 at 19:52, Bob Camp kb...@n1k.org wrote:
Hi
SS is signal strength. There is a setting somewhere buried deep in the SCPI
to switch the display units.
Bob
I guessed SS probably was signal strength, but what values are good
and bad? There's nothing in any manual I can find
On 14 December 2014 at 20:25, Bob Camp kb...@n1k.org wrote:
Hi
http://www.cnssys.com/files/M12+UsersGuide.pdf
Thank you.
On page 46 there is a pretty good chart for signal strength to c/n. The chart
for the Motoroal GPS module in yours should be quite similar.
If there is no SCPI then
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK.
Registered in England and Wales, company number 08914892.
http://www.kirkbymicrowave.co.uk/
Tel: 07910 441670 / +44 7910 441670 (0900 to 2100 GMT only please
On 15 Dec 2014 00:52, Tom Van Baak t...@leapsecond.com wrote:
If any of you want me to post more photos let me know. I have several of
every kind of HP/Agilent GPSDO product. And they are all genuine because I
bought them a decade before the China/eBay/GPSDO business.
Hi Tom,
I would appreciate
On 13 December 2014 at 05:13, Peter time...@exemail.com.au wrote:
On 12 December 2014 at 08:31, Dr. David Kirkby wrote:
This has been reported to eBay by telephone, reported to the police, and I
will soon create a case on
eBay, and report it as a fake. I have a crime reference number from
On 13 December 2014 at 06:55, David J Taylor
david-tay...@blueyonder.co.uk wrote:
Or get a more modern using such as the LTE-Lite evaluation kit. I see a
19.2 MHz version as item 171504588307, but 10 MHz and 20 MHz versions have
also been made available. It's a lot smaller and lighter than
On 13 December 2014 at 13:03, Bert Kehren via time-nuts
time-nuts@febo.com wrote:
Ebay does not protect buyers and it is understandable. Look at the # of
your buys and the # of the seller. I can tell you horror stories and in the
case of
_ggg*fitting_
On 13 December 2014 at 11:13, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
I have a counterfeit 58503A which appears to run warmer than I would
have expected. I'm not sure if this may be by design, or if there is a
fault, or maybe there is simply not enough
On 13 Dec 2014 19:41, ed briggs edbri...@outlook.com wrote:
I’ve never had a problem with this vendor.
I’m sorry to hear you are having difficulties with your 58503a, but on
the basis of my experience, I would not call this vendor disreputable, as
others seem to be suggesting. I’d suggest
On 12 December 2014 at 03:54, Peter time...@exemail.com.au wrote:
Hi David
The fact it does actually work, probably indicates there's nothing too
serious wrong with it.
In my opinion, you potentially (pun intended) have a very serious problem.
Your LOG shows the 15V supply rail out
On 11 December 2014 at 01:10, Bob Camp kb...@n1k.org wrote:
Hi
I suspect that if you look closely at the board in the unit, it’s got water
stains on it ….
Bob
This was bugging me too much, so I decided to open it to find out.
Sure enough, there are rust signs in it. One can also see clear
, rather
than just get my money back and let the problem persist for others.
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK.
Registered in England and Wales, company number 08914892.
http://www.kirkbymicrowave.co.uk
As you will have gathered from my posts on this mailing list, I bought
something from eBay that was supposed to be an HP 58503A:
http://www.ebay.co.uk/itm/271642102264
But I have every reason to believe has a new case and serial number
label fitted to the old chassis. The serial number just fell
came with a simple magnetic mount, patch antenna which picks
up enough signal even indoors (top storey of a two storey building) whereas
the older units are typically much less sensitive and require an outdoor
antenna, a complication you can do without.
Cheers,
David
--
SatSignal Software
.
[]
Brian Lloyd
If it helps, Brian, my notes for doing the same thing with a Raspberry Pi
are here:
http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html
Includes a wall-clock but no nixies:
http://www.satsignal.eu/raspberry-pi/DigitalClock.html
Cheers,
David
On 11 December 2014 at 01:10, Bob Camp kb...@n1k.org wrote:
Hi
I suspect that if you look closely at the board in the unit, it’s got water
stains on it ….
Bob
I suspect you might be right Bob, but I am not going to break the seal
to open it up to find out. I will be contacting the seller,
Hi Stuart,
Several people have contacted me about the fakes. I can't understand why
his feedback is so good. The seller bought some calibration standards from
me which I clearly stated were damaged. I did at the time notice they left
about 25% negative or neutral feedback, so was expecting
By any chance, does anyone on the list have a copy of the manual
(preferably with schematics) for an
Astrodata 5140 Time Code generator?
I would like to get this venerable NASA refugee up and running again.
Can't beat the mesmerizing glow of Nixie tubes.
I'd happily pay copying or scanning
On 11 Dec 2014 21:52, Bert Kehren via time-nuts time-nuts@febo.com
wrote:
who did you buy it from?
The seller was yixunhk on eBay.
That information was in the title and first line of my original post.
Dave.
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I have ordered a ST620 and decided to get a hard copy manual. But the
thoughts of paying Stanford Research $100 for one are not overly
attractive. A more sensible approach to me is to download the manual and
get it bound. I found a company in the UK that can do it for a lot less.
I thought it
On 10 December 2014 at 10:09, Jean-Louis Oneto jl.on...@free.fr wrote:
I have a pdf file in which I have already reunited the user manual, the
schematics, several application notes. The format of the pages are mixed:
most of the manual is in A4/Letter, the schematics are in A3. I have added a
I see this on eBay - it might interest some, and at $10 it will not
break the bank
http://www.ebay.ca/itm/1968-Scientific-American-Magazine-Cesium-Clock-Standards-Measurement-DNA-Dis-/381078816062
BTW, does anyone know why the Amateur Scientist column was dropped in
Scientific American? Perhaps
Hi David,
Yes, You mean the hourly dips? That is caused by the the VLF receive
software that
is running on the same PI. It makes hourly recordings of DC to 24 Khz
with a USB soundcard. The CPU is running at max capacity most of the
time.
Perhaps it is now time for a dedicated PI, that only has
USB is not as useless as you might first
think, because in tests here using the DCD/PPS over USB produced better
results with NTP than an internet connection alone. It is worth checking -
your results may differ.
Cheers,
David
--
SatSignal Software - Quality software written to your
, but in Windows the COM port driver provides an event
when the DCD line changes state, and Dave Hart's code stores that value to
timestamp the NMEA data when it arrives.
Does Linux not support an interrupt from a virtual COM port?
Cheers,
David
--
SatSignal Software - Quality software written
which are nearer to UTC
but they have considerably more jitter. I'm only seeing this on the
'scope - likely my PCs would bother with a microsecond either way.
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay
Thanks for pointing this out David,
Compiling an new kernel was holding me back. I followed your instructions
and
everything works beautiful. The PI that is running the PPS timekeeping with
NTP
is serving as a VLF receiver as well. Taxing the poor CPU, but with
kernel PPS support
the NTP
- the device being optimised
for frequency rather than timing.
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk
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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,
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: http
are within under 100 ns of each other, hence my expectation.
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk
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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
and the specification of the Thunderbolt?
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk
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On 7 December 2014 at 15:55, Bob Camp kb...@n1k.org wrote:
The real issue is:
Do you want to spend hours a day doing searches on eBay for all sorts of
weird spellings and listing conventions? Do you want to search all of the
various eBay sites throughout the world? When any single piece
On 7 Dec 2014 18:59, Bob Camp kb...@n1k.org wrote:
There is always
http://www.geo-ship.com/
which searches all eBay sites except those that use obscure characters
like China.
Right, but now you need to put in every possible spelling of anything
that might reference to what you
=
Folkert's solution was very helpful, but there is now kernel-mode PPS
support for a GPIO pin the current Raspberry Pi Linux - see:
http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html#easy
I'm running that on a couple of systems here.
Cheers,
David
to replace the tube?
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK.
Registered in England and Wales, company number 08914892.
http://www.kirkbymicrowave.co.uk/
Tel: 07910 441670 / +44 7910 441670 (0900 to 2100 GMT only
On 6 Dec 2014 17:58, paul swed paulsw...@gmail.com wrote:
Well a bad tube is a bad tube and thats been my story. Though for $125 how
can I complain. But for $999 plus $79 shipping no interest at all.
When the tubes used up its used up. Generally.
Regards
Paul
WB8TSL
I have never looked a
On 6 Dec 2014 18:33, Bert Kehren via time-nuts time-nuts@febo.com wrote:
be done, the real issue who would buy one people that need
Cesium will pay the price for a new one and time nuts would not spend the
money for a working rebuild tube. Where is the market?
There's a professional market
On 6 December 2014 at 17:58, paul swed paulsw...@gmail.com wrote:
Well a bad tube is a bad tube and thats been my story. Though for $125 how
can I complain. But for $999 plus $79 shipping no interest at all.
When the tubes used up its used up. Generally.
Regards
Paul
WB8TSL
I just offered
On 6 Dec 2014 21:10, paul swed paulsw...@gmail.com wrote:
David
I picked my unit up for $125 at a Hamfesyt and the tube was absolutely bad
as it turned out. But then what do you expect for the $. That said another
time nut gave me his dead tube from a 5060. I spent a good deal of time
On 5 Dec 2014 07:05, David J Taylor david-tay...@blueyonder.co.uk wrote:
David it always does a survey. Though even while doing that the frequency
output is fine after its had a bit to stabilize. I wanted to bring the
survey lamp out to a front panel LED however that appeared to be more work
I searched
a little while back. Perhaps I was using the wrong search terms! I would
have thought that Maplin, for example, would have something.
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk
On 27 Nov 2014 13:56, Jim Lux jim...@earthlink.net wrote:
Time to stock up on those transformers, mixers, amplifiersgrin
Throughout the month of December, all online orders of any quantity of
any Mini-Circuits catalog model from our web store on minicircuits.com will
receive a 10% *discount!
On 5 Dec 2014 12:23, Bob Camp kb...@n1k.org wrote:
Shipping across the atlantic has become silly expensive over the last
decade. There are a *lot* of organizations that are behind the curve on
figuring out how to do it cheaply.
Bob
I ship VNA calibration kits across the Atlantic almost every
On 5 Dec 2014 13:19, Chuck Harris cfhar...@erols.com wrote:
I think the name light pipe has been supplanted by fiber-optic.
-Chuck Harris
Technically I agree that they have a lot in common. But I think the large
devices, which are often not cylindrical, are usually called light pipes.
On 5 Dec 2014 20:05, Dave M dgmin...@mediacombb.net wrote:
I finally took an ineterest in this thread, because I have needed (rather
infrequently) a way to get LED light from a PCB to a front panel. I
Googled flexible light pipe (no quotes in the Google search) and got
loads of hits for them.
think my LTE-Lite has a way of setting that (please tell me I'm wrong) and
the recently mentioned Reyax module should also be able to do this:
http://www.reyax.com/Module/GPS/RY825AI/RY825AI.pdf
I've yet to power mine up.
Cheers,
David
--
SatSignal Software - Quality software written to your
appears to be correct,
and there is 20 MHz from the 20 MHz port, but nothing from the Clock Out
port on this 10 MHz unit.
The unit is as-received, with the exception of switching to NMEA sentences.
Thanks,
David
--
SatSignal Software - Quality software written to your requirements
Web: http
David it always does a survey. Though even while doing that the frequency
output is fine after its had a bit to stabilize. I wanted to bring the
survey lamp out to a front panel LED however that appeared to be more work
and risk then the value.
The documentation says that from time to time
On 28 Nov 2014 02:06, Don Latham d...@montana.com wrote:
I’ve just replaced the SR620 oxco option 01 with a Morion, by simply
adding a 7812 to the 15 v heater
Did the SR620 have option 01 before you did the mod?
In other words, did you change to the Moxen because you believe it is
better than
On Wed, Dec 03, 2014 at 02:53:50PM -0500, Paul wrote:
On Wed, Dec 3, 2014 at 12:08 PM, Neil Schroeder gign...@gmail.com wrote:
I haven't really ever been able to talk to my
prs10 via serial
I took the easy way out and bought the interface board (directly from SRS).
Do you have
On Wed, Dec 03, 2014 at 08:46:58PM -0500, Bob Camp wrote:
But it seems that Morion rulez, noise-wise.
The OCXO in the TBolt beats the Morion parts by a wide margin.
That implies all Tbolts have the same OCXO... is that actually
true of most of the surplus ones ? Weren't there
On 2 Dec 2014 03:10, wb6dgn_...@att.net[hp_agilent_equipment]
hp_agilent_equipm...@yahoogroups.com wrote:
Isn't the 10811 a double oven oscillator (an oven within an oven)? I
also believe it has anticipator circuitry to predict changes based on
environmental parameters. Or...am I confusing
On 3 Dec 2014 02:08, James Robbins jsrobb...@earthlink.net wrote:
Brief update:
This receiver (whatever it is) refuses to forget 1995 despite
un-powering, etc. I will learn to live with it, I think.
You could report it to the seller as a fault. He must have quite a bit of
experience on
On 1 December 2014 at 16:54, Bob Stewart b...@evoria.net wrote:
I've just won a Symmetricom / Datum PRS45A PRS45-0001K - Single Cesium
PRS-45 DS1 on ebay from a guy in the Netherlands.
$900 seems cheap. I'm surprised you made an offer when it was $975. I
bet you would have been sick if you
On 30 Nov 2014 05:55, Orin Eman orin.e...@gmail.com
[hp_agilent_equipment] hp_agilent_equipm...@yahoogroups.com wrote:
Weren't you looking at the LTE Lite? It should do fine as long as you
can get the antenna well situated (not necessarily outdoors, some of us get
along with having it in an
On 27 November 2014 at 22:38, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
It was very easy to fit the 10811A oven (HP 10811-60111) and get the
oven working
snip
With the old TCXO in the frequency counter, the indicated frequency of
the 10 GHz signal
I'm seriously giving consideration to getting an HP frequency
standard, and are looking at some from the Chinese seller yixunhk on
eBay. I would be interested in the views of people on the merits of
these 5 quite similar items as a GPS locked frequency standard. I'm
not really so bothered about
On 30 November 2014 at 15:05, fjdvr...@zonnet.nl
[hp_agilent_equipment] hp_agilent_equipm...@yahoogroups.com wrote:
Dave,
I have had a 10811 in the 5342A. Not really a problem. However the thing is
that while your counter is switched off the outside temp of the oven warms
up, no surprise
On 30 Nov 2014 16:17, Bob Camp kb...@n1k.org wrote:
1) Z3805A http://www.ebay.com/itm/251527236609
* 16 channels
* double oven
* dual outputs
* $499 + free carriage
2) Z3805A http://www.ebay.com/itm/271324714268
* 8-Channels GPS Receive
* 6-Channel GPS Parallel tracking
*
On 30 November 2014 at 21:38, Bob Camp kb...@n1k.org wrote:
Hi
You *know* what’s going to happen (it always does):
You’ll get the LTE sold and the next day another project will pop up that it
would be absolutely perfect for :)
Bob
I don't know what the warranty situation would be on a
On 1 Dec 2014 03:35, paul swed paulsw...@gmail.com wrote:
OK so it was not as hard as I thought getting all of teh screws out. The
harder part is getting the actual board to slip out of the back.
After getting to the bottom I found a locked 10 Mhz signal on U206 pin 1
somewhat of a sine wave
I think I have a flaw in my understanding of this.
How can something like an SR620 measure the ADEV of an oscillator, if the
oscillator is of a similar or better than the reference fed into the SR620?
I see plots of ADEV for hydrogen masers, but I can't understand how this
can be measured from
On 27 November 2014 at 22:38, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
The HP 5342A has an optional oven oscillator. I just bought one of
those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz.
I'm sure I can trim it closer than
source in the SR620.
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK.
Registered in England and Wales, company number 08914892.
http://www.kirkbymicrowave.co.uk/
Tel: 07910 441670 / +44 7910 441670 (0900 to 2100
The HP 5342A has an optional oven oscillator. I just bought one of
those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz.
I'm sure I can trim it closer than that, but if possible I'd like to
stick an oven oscillator in it. Does anyone know what is involved? I
have at least one
On 27 November 2014 at 22:15, Brooke Clarke bro...@pacific.net wrote:
Hi David:
Hi Brooke
If you look just to the right of the SR620 you will see a separate box that
contains the PRS10.
Ah, I missed that!!!
I was thinking it fitted inside the SR620, but obviously not.
The PRS10 can work
, it is not going to work out a lot cheaper than
buying a used OCXO device.
My mind is not made up about this. There are advantages and
disadvantages of both.
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK
On 27 November 2014 at 23:03, Bill Dailey docdai...@gmail.com wrote:
Get the Fury. Plug and play.
Any idea of the price? I was thinking about that, and was going to ask
Said what the price is, but if you have a rough idea, I would be
interested to know. I might suggest he puts them on eBay too
Dr David Kirkby
On 27 Nov 2014 23:27, Brooke Clarke bro...@pacific.net wrote:
Hi Dave:
http://www.ebay.com/itm/171504585820
http://www.prc68.com/I/LTE-LiteGPSDO.html
Brooke Clarke
I was aware of them, and are still contemplating getting one, but the Fury
from Jackson Labs uses an OCXO
I am hoping to buy a SR620 from a seller who is not familiar with the
instrument, but who
1) Has knowledge of electronic test equipment in general.
2) Is willing to test the SR620 before an international shipment.
This puts me in a somewhat better position than typicall eBay sale with
comments
On 25 November 2014 at 19:51, S. Jackson via time-nuts
time-nuts@febo.com wrote:
Jim,
please remember you need proper lightning protection if you put the antenna
outside..
bye,
Said
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on the phone. I
explain that is not acceptable.
MANAGER: So how do you suggest we earth it?
ME: I don't know how to do it. This is not my area of expertise, but I
know that what you are proposing, with 1 mm wire and poking the wire
into the ground with your fingers is not acceptable.
Dr. David Kirkby
On 26 November 2014 at 22:14, Chris Albertson albertson.ch...@gmail.com wrote:
You CAN (almost) lightening proof your system.
BUT if the almost is not quite enough, one could damage a lot of
expensive test kit.
Remember that Ethernet is always
gavalically isolated by transformers
I lost
The magnetic field in the core due to the current in the windings is
proportional to current times number of turns. If there are more than one
winding, add the currents. Yes, 2 x 20mA certainly exceeds 30mA. The core
will be driven closer or into saturation and the inductance will be
On 27 Nov 2014 01:14, Chris Albertson albertson.ch...@gmail.com wrote:
After this minimum you have th think about the probability of a strike.
If
you live in Orlando Florida then it might be 100% and nearly zero in other
places and then you ask what the radio equipment cost. I paid $18 for
On 25 November 2014 at 19:42, Jim Miller j...@jtmiller.com wrote:
I'm putting it in the recommended Hammond enclosure powered by a USB cable
from my PC. I had originally planned to use the wall wart provided but I
want to get status from the unit without hacking a window in the top to see
the
On 25 Nov 2014 23:10, Bob Camp kb...@n1k.org wrote:
Hi
For a modern build, the PZT3904’s and PZT’s are a pretty good way to
go with this amp.
For normal distribution to instruments, there’s really no need to do
anything this complex.
Bob
I am also thinking about the construction of a
On 24 November 2014 at 03:44, Said Jackson via time-nuts
time-nuts@febo.com wrote:
On the 20MHz units there is already a strong buffer that can drive 50 Ohms
terminations so adding a buffer in front of the coax connector on that
version would have just added unnecessary phase and AM noise,
I would like to make a unit with multiple 10 MHz 50 Ohm outputs to feed my
various bits of test equipment. I am thinking about some practical
considerations.
1) It would be great if there was a circuit published which can give 50 Ohn
output impedance from a 12-15 power supply, which
a) Doesn't
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