On 10 Aug 2014 05:39, Jim Lux jim...@earthlink.net wrote:
(but, I gotta say that a lot of the patents that get published in the
back of things like IEEE Ant and Prop Magazine seem, to me, to be pretty
obvious..)
I have not looked at patents recently, but most I have looked in the past
are
On 10 Sep 2014 17:36, Brian Lloyd br...@lloyd.aero wrote:
On Wed, Sep 10, 2014 at 9:42 AM, Azelio Boriani azelio.bori...@screen.it
wrote:
I skimmed through the patent but did not read it in
detail. There may be some nugget in there that represents something new
but
nothing jumped out at me.
On 26 Nov 2012 14:12, David Kirkby david.kir...@onetel.net wrote:
I've got an HP 8720D VNA. This has been out of support from Agilent
for 8 years, so its getting on a bit. There's a clock in the
instrument which keeps the date and time. This is losing about 1 day
per month (rough guess), so
On 12 Sep 2014 03:35, Alex Pummer a...@pcscons.com wrote:
No that is to much, except if you overdrive it and you are so lucky that
after it broke it is still working on a different frequency, but I would
suggest check your frequency counter too, because 3% off of a clock
frequency wold make the
Dr David Kirkby
Managing Director
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3
6DT, United Kingdom
Registered in England and Wales as company number 08914892
http://www.kirkbymicrowave.co.uk/
Tel 07910 441670 / +44 7910 441670 (0900-2100 GMT)
On 12
On 13 Sep 2014 01:23, Alexander Pummer alex...@ieee.org wrote:
just open the box, look for the wires which going to the magnet which
drives the minute hand and measure the period time -- not the frequency, it
is to low
yes analog quarz clock slows down as the battery get old, you will be
On 13 Sep 2014 04:39, David McGaw n1...@dartmouth.edu wrote:
The battery probably was going weak and the oscillator coming out of full
control by the crystal. The tuning-fork crystal used in RTCs is not as
high-Q as a MHz crystal. I have noticed clocks using these can go quite
slow at low
On 11 Sep 2014 04:35, Bob Stewart b...@evoria.net wrote:
I've ordered the PWM version of the PIC, and hopefully, since it's the
motor control version (as opposed to the audio version) it will have much
better noise performance.
I don't know the PIC but I would have thought chips for audio would
OOPS! CORRECTION.
I don't know the PIC but I would have thought chips for audio would be
optimised for low noise far MOOR than one for driving motors.
Ears are more sensitive to a bit of noise than motors.
I assume I have misunderstood you.
Dave
___
On 17 Sep 2014 23:38, Peter Putnam n...@sbcglobal.net wrote:
Greetings,
The link below describes a homemade GPS receiver.
It is presented in a detailed and elegant manner that is certain to
appeal to this reflector's subscribers.
Peter
http://www.aholme.co.uk/GPS/Main.htm
I don't
On 26 Sep 2014 13:01, Andrea Baldoni erm1ea...@ermione.com wrote:
On Fri, Sep 26, 2014 at 10:07:56AM +0100, Dr. David Kirkby (Kirkby
Microwave Ltd) wrote:
I don't understand the units of signal strength
The L1 carrier is spread over a 2 MHz bandwidth and its strength at the
Earth's
On 26 September 2014 13:52, Azelio Boriani azelio.bori...@gmail.com wrote:
From gpsinformation.net:
In the frequency allocation filing the L1 C/A power is listed as 25.6
Watts. The Antenna gain is listed at 13 dBi. Thus, based on the
frequency allocation filing, the power would be about
The 10 MHz high stability oscillator (option 1D5) in my HP 8720D VNA
has the following specs
Stability
0 to 55 deg C, +-/ 0.05 ppm
Aging per year +/- 0.5 ppm
What sort of oscillator is this likely to be - TCXO or OCXO?
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office:
On 28 Sep 2014 03:11, Alexander Pummer alex...@ieee.org wrote:
that is most likelly a TXCO, what is in the user's manual about warm up
time?
Two people responded - one says a OCXO and the other an TCXO!!
The warmup time is I think an hour, but clearly that is not the time for
an oven to warm
I am looking for a quick simple way to create a frequency of 200 MHz from
10 MHz. Actually 100, 200, 300 or 400 MHz would all work, but 200 MHz
would be my preference.
The input will be around 0 to +10 dBm and the output needs to be about +13
dBm.
I did think of a x5 x4 frequency multipliers
On 28 Sep 2014 11:37, Poul-Henning Kamp p...@phk.freebsd.dk wrote:
There's a pretty excellent 10-200 MHz multiplier in your HP5370.
Consider using it for an experiment to see if your idea even works...
I know longer have that - I sold it to someone on this list, then later
regretted selling
On 28 September 2014 14:49, dlewis dlewis6...@austin.rr.com wrote:
If you can use 90 MHz, .
No, I would really like to keep it an integer multiple of 100 MHz.
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On 28 September 2014 13:14, Jim Sanford wb4...@wb4gcs.org wrote:
Dave:
Check out w1ghz.org.
Paul has some designs (and boards) that can lock different oscillators to a
reference. He uses a long time constant to manage phase noise.
Thanks, I have dropped him an email. He has one at 200 MHz,
On 28 September 2014 12:40, Bill Dailey docdai...@gmail.com wrote:
I use this for my qs1r (125MHz) and to discipline a sound card (24.576MHz).
http://www.valontechnology.com/5007%20synthesizer.html
http://www.valontechnology.com/3008%20divider.html
I actually have one 5007 sandwiched between
On 28 September 2014 15:52, David McGaw n1...@dartmouth.edu wrote:
The temperature stability and warm-up time imply an OCXO. 0.05ppm over
0-55C is at the limit of what can be achieved with a TCXO but they do not
have a long warm-up time. It would be expensive and only would be used if
On 28 Sep 2014 11:37, Poul-Henning Kamp p...@phk.freebsd.dk wrote:
There's a pretty excellent 10-200 MHz multiplier in your HP5370.
Consider using it for an experiment to see if your idea even works...
--
Poul-Henning Kamp
This response on the Keysight forum by a VNA guru
On 28 September 2014 19:37, Tom Miller tmiller11...@verizon.net wrote:
Looks like I am having crow for lunch today. I did find the 1D5
installation instructions and at first it looked like the standard OCXO
package used in many HP instruments. But some closer reading shows that it
may in fact
On 29 Sep 2014 02:05, Tom Miller tmiller11...@verizon.net wrote:
Dave, do you have access to a good counter?
Not really.
I have an HP 7 modular measurement system, which has all the bits for
a 22 GHz spectrum analyzer. The analyzer has a frequency counter mode, but
I have not written any
On 29 Sep 2014 00:27, Tom Van Baak t...@leapsecond.com wrote:
The next clue is the attached photo found at:
Agilent 08753-60158 Opt. 1D5 for 8753D/E/ES
http://www.ebay.com/itm/151256172424
Note that is for an 8753 (3/6 GHz) series VNA, not the 8719/20/22, which
are 13.5, 20 and 40 GHz
On 28 Sep 2014 13:19, Jim Sanford wb4...@wb4gcs.org wrote:
Dave:
Check out w1ghz.org.
Paul has some designs (and boards) that can lock different oscillators to
a reference. He uses a long time constant to manage phase noise.
I looked into that but it is an expensive way. PCBs are $6 each!!!
On 29 Sep 2014 17:58, Bob Raker bob.ra...@gmail.com wrote:
It is a low end OCXO - uses AT cut crystal. 15V @ 300 mA. Warm-up time
is
6 minutes max for .1 ppm. Other specs as indicated in previous emails.
Has NO EFC.
Where do you get this information from?
I think I am going to take the
On 29 Sep 2014 20:06, Hal Murray hmur...@megapathdsl.net wrote:
drkir...@kirkbymicrowave.co.uksaid:
Unfortunately Keysight have now sold all the cables, but do have the
front
panel overlay which is arguably the most critical item.
Spending £500 on 5 cables and a front panel overly is more
On 30 Sep 2014 08:46, REEVES Paul paul.ree...@uk.thalesgroup.com wrote:
David,
Just a thought but have you tried Pasternack? They do 'custom' precision
cabling including 2.4mm connector options.
regards,
Paul, G8GJA
Hi Paul,
I don't know how good Pasternack are - I have seen some
On 29 September 2014 22:45, Bob Camp kb...@n1k.org wrote:
Hi
The information came from the HP data sheet on the oscillator. They provide
it to the people who manufacture the oscillators for them.
Bob
Can you share the data sheet?
Dave
On Sep 29, 2014, at 1:14 PM, Dr. David Kirkby
On 30 Sep 2014 14:16, Jim Lux jim...@earthlink.net wrote:
On 9/30/14, 12:44 AM, REEVES Paul wrote:
David,
Just a thought but have you tried Pasternack? They do 'custom' precision
cabling including 2.4mm connector options.
regards,
Paul, G8GJA
Rather than Pasternack, you might find
Following on from my question the other day about the type of
oscillator in the HP 8720D VNA, I finally got around to setting this
up on the spectrum analyzer today. Luckily, some software I wrote back
in 2008 for a friends HP 7 system was easy to modify to grab the
save the frequency. So I
Further to my question the other day about what type of oscillator was
used in the HP 8720D VNA, fitted with the high stability oscillator
option (1D5), here is the frequency as the instrument is switched on,
after being powered off for 2-3 hours.
The oscillator appears to start too high in
On 2 Oct 2014 07:10, Magnus Danielson mag...@rubidium.dyndns.org wrote:
David,
The character of starting high/low and then stabilize some 5-30 min later
is typical of oven oscillators. Underdamped ovens have been seen before, I
have even seen one on the brink of oscillation.
Thank you. Do you
On 4 October 2014 07:57, Magnus Danielson mag...@rubidium.dyndns.org wrote:
This answers my original curiosity now - did I have an OCXO or TCXO.
With that curve it is definitely an OCXO, and my guess is that it is an
SC-cut, which matches starting +40 ppm high (if I recall things correctly).
On 4 October 2014 13:24, Tom Van Baak t...@leapsecond.com wrote:
Dave,
Hi Tom
Thanks for the raw data. Attached is my plot. Your data looks ok to me.
Great
If you're interested here are some random comments about your
8720D-1D5-oscillator-frequency.csv file:
Sure
- Thanks for including
On 4 October 2014 23:03, John Miles j...@miles.io wrote:
I just stuck an offer on a SRS 620, which is sold as seen. I'll take a
chance it works if my offer is accepted.
The 5370B is still the only high-performance counter that I own, personally.
SR620s are fine as far as they go,
Is it me,
On 5 Oct 2014 03:26, Tom Van Baak t...@leapsecond.com wrote:
Again, either one is fine for time nut use. One of these days I should do
a detailed performance comparison among a large set of both counters.
/tvb
I was actually going to suggest that it would be really nice to see a
comparison
I see this on eBay
http://m.ebay.com/itm/220505574616
Note that the seller has misspelled the manufacturers name. Has anyone used
one? I have never even heard of this manufacturer - I guess it is Chinese.
___
time-nuts mailing list --
There's a discussion on the ukmicrowave list about combining the
power from two 10 GHz Gunn oscillators with a magic T. One might
expect to get nearly double the power if the two oscillators are
combined. What people are observing is getting more than double the
power. To quote from
On 8 Oct 2014 20:18, paul swed paulsw...@gmail.com wrote:
David the locking makes sense but the other numbers do not make sense.
Combined best case would be +3 DBm also you say the current on the diodes
goes down. More power for less power in is not adding up.
I agree. However, the fact that
On 8 Oct 2014 20:26, Bob Camp kb...@n1k.org wrote:
Hi
It’s called injection locking. The two oscillators (or what ever) lock up
at exactly the same frequency and some arbitrary phase. Depending on the
amplitude and phase at the sum point, the result can be anything from +6 db
to zero power.
On 8 Oct 2014 20:15, cdel...@juno.com wrote:
Hi,
I came across this phenomena when transmitting with two 5KW transmitters
via separate parabolic antennas to a satellite.
If the phase of the TXs was correct the received signal at the satellite
was 6db hotter!
I can explain that easy
On 9 Oct 2014 00:26, paul swed paulsw...@gmail.com wrote:
Depends on your detector is it a Voltage or power. 3DBM or 6 DBV are the
same.
Paul
WB8TSL
You are mistaken. A 3 dB increase in signal level is a 3 dB increase -
there's no need to say if power or voltage.
The formula for computing
On 8 Oct 2014 23:52, Bob Camp kb...@n1k.org wrote:
HI
In the case of a magic Tee or a normal power splitter (both passive
devices), the current will not be limited by the combiner or the source.
With a proper combiner, the source will always be running into 50 ohms. You
will indeed get 6 db in
On 9 Oct 2014 22:17, Andrew Rodland and...@cleverdomain.org wrote:
You pick up satellite TV with a parabolic dish that points at one spot
in the sky where the geostationary satellite lives. A sun outage
happens when the sun wanders into the focus and overloads the receiver
with noise that
On 9 Oct 2014 23:28, Brooke Clarke bro...@pacific.net wrote:
Hi Dave:
The small size of the Ku-band TV dish and that it's surface is covered
with a flat type paint means there's little or no thermal heating of the
receiver or feed.
There were cases with the early C-band TVRO systems where
On 11 Oct 2014 16:25, Didier Juges shali...@gmail.com wrote:
If I could get 1200W by combining two 300W amplifiers, I would now be
retired and very wealthy indeed.
Unfortunately, there is no free lunch and unless somehow the Gun
oscillators were delivering more power when connected to the magic
On 8 Oct 2014 20:18, paul swed paulsw...@gmail.com wrote:
David the locking makes sense but the other numbers do not make sense.
Combined best case would be +3 DBm also you say the current on the diodes
goes down. More power for less power in is not adding up.
I went to a users meeting
On 17 Oct 2014 19:33, S. Jackson via time-nuts time-nuts@febo.com wrote:
Hello Jim,
let me answer through Time Nuts as this may interest other parties as
well.
Yes, using a fast flip flop to generate 10MHz out of the 20MHz TCXO 3.0V
CMOS output from the LTE-Lite module will preserve the
I am sorry, but I can't follow the circuit diagram. It is not clear to me
what pins are joined, and what are not. Sometimes you have used a filled
circle to indicate lines are joined, and in another case there's a
semicircle to indicate that they are not. But on some of the others, I
don't
On 30 Oct 2014 04:48, Mark Sims hol...@hotmail.com wrote:
A friend of mine is looking for an ADC that can do 5 bits at 20-40
gigasamples/second... there is a timing related component to the project.
Any ideas of who makes a decent beastie? It needs to supply continuous
data so things like a
Click is a short TV program produced by the BBC about tech related things.
Anyway, the issue I see today (1/11/2014)
http://www.bbc.co.uk/programmes/b04p21jv
had a bit about GPS failure, GPS jamming, and use of eLORAN as a backup.
*Hopefully* you can see it on the BBC iPlayer if interested,
On 1 Nov 2014 16:50, Jim Lux jim...@earthlink.net wrote:
behind a scintillator)
The 40 GHz stuff these days is not nearly as exotic as it used to be. The
challenge might be test equipment when you're debugging your 40 GHz
synthesis chain.
There's a fair amount of test equipment around to 40.0
On 3 Nov 2014 02:59, Bert Kehren via time-nuts time-nuts@febo.com wrote:
I respectfully disagree. Before getting totally submerged in time nuts
issues I did extensive work on signal sources up to 40 GHz as a hobby. So
I
have since the early 90's sweeper, synthesizer, power meter, mixer for
On 3 November 2014 12:58, Bert Kehren via time-nuts time-nuts@febo.com wrote:
Do not want to get off list subject but again have to disagree.
Lets's leave it there.
Just checked my buys
and on July 1st 2012 I bought a Wiltron 6740B 40 GHz excellent condition
for $332 total cost.
That was
On 6 November 2014 18:09, xaos x...@darksmile.net wrote:
I just cant figure out what it is ;)
http://www.ebay.com/itm/HP-Agilent-5071A-Primary-Frequency-Standard-/191386439159?pt=LH_DefaultDomain_0hash=item2c8f854df7
One obvious question: Are the leftover parts worth anything close to the
On 18 Nov 2014 23:39, Bob Camp kb...@n1k.org wrote:
Hi
Assuming that the number that looks like a date on the front panel is
indeed a date, the gizmo was designed about 3 months ago. The OCXO looks a
*lot* like a surplus Morion part. I think I’ll let somebody else go first
on doing all the
Said,
For a general purpose lab source, to feed things like
* 22 GHz spectrum analyzer
* 4.5 and 20 GHz signal generators
* 3 and 20 GHz VNAs
* 20 or 40 GHz frequency counter (I'm just looking to buy one)
what would you think is the best one to get - 10 or 20 MHz ? Or toss a coin?
Dave
Dr.
I am looking for a microwave frequency counter and won an auction for an 18
GHz 5342A with the GPIB option today @ £200 (GBP). I have just paid for
that.
I also have the chance to get a 5352B 40 GHz counter for £500. That has
GPIB as standard.
In the short/medium term I don't see much use for a
On 21 Nov 2014 23:24, Doug dmcgarr...@optonline.net
[hp_agilent_equipment] hp_agilent_equipm...@yahoogroups.com wrote:
On 11/21/2014 04:51 PM, 'Dr. David Kirkby (Kirkby Microwave Ltd)'
drkir...@gmail.com [hp_agilent_equipment] wrote:
I am looking for a microwave frequency counter and won
After regrettably selling my 5370B a few years ago, I decided to look for a
used SR620.
Are there any particular issues with these that could be tested by the
seller prior to shipping it? I have not downloaded the manual yet, but I
assume there's a basic test in there - probably similar to that
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
On 23 Nov 2014 14:45, Bob Camp kb...@n1k.org wrote:
Hi
If you have a basement in your house / building
I do not.
—and —
it’s dry and reasonably draft free (no garage doors opening up from time
to time)
My lab is a room which is part of the garage! Just about everything is
against me with
On 23 Nov 2014 17:49, Poul-Henning Kamp p...@phk.freebsd.dk wrote:
In message
canx10hb0kdrnaayzgvm1gkduj7gklth0acdxczg894hxbus...@mail.gmail.com
, Dr. David Kirkby (Kirkby Microwave Ltd) writes:
He installs ground source
heat pumps for the geothermal energy. He says
On 23 Nov 2014 16:25, Tom Van Baak t...@leapsecond.com wrote:
For plots and photos showing performance with, and without, and with
insulation see:
http://leapsecond.com/pages/LTE-Lite/
The difference is dramatic, especially if you are used to working with
OCXO where this sort of effect does not
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,
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
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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To unsubscribe,
Said mentioned on an earlier thread that if a GPS antenna is used
outside, lightening protection should be used. This immediately
reminded me of something that happened about 10 years ago to me
1) Lightening damaged my ADSL modem. It because totally dead.
2) Every computer and a printer connected
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
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
I finally paid for a used SR620
http://www.thinksrs.com/products/SR620.htm
today, after the seller has done quite a few tests on it, so hopefully
I should have a good one.
I note Stanford Research also do an SR625
http://www.thinksrs.com/products/SR625.htm
which seems to have two differences
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
There's a seller on eBay selling what he says is Z3801A upgraded to
58503A. One or two things have made me a bit suspicious of that seller
- nothing to do with his GPS things. Does anyone know what he does? He
also have an 58503A, but that's a couple of hundred $'s more than an
upgraded Z3801A.
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,
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
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 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 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 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 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
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.
I see this cesium reference on eBay, where apparently someone returned
it due to the fact it had a bad tube.
http://www.ebay.com/itm/HP-Agilent-5061A-Cesium-Beam-Frequency-Standard-FOR-PARTS-REPAIR-/141483787108
I'm wondering if it was someone on this list. It is likely to be
practical to
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
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