One of my Z3805's (with the double oven 10811 ocxo iirc) also performs
similarly at times to the 58503A mentioned by Said. From an adev perspective
it's close to my BVA at some tau's (around a hundred seconds or so iirc.) At
times though the output seems to jump in frequency. My other
Said,
Patiently waiting for my 10 mhz unit. What are your ideas on using it to
control a 10811 instead of the built in 10 mhz osc? Will there be enough
control voltage for the 10811?
Regards,
Bill Riches
Cape May, NJ
-Original Message-
From: time-nuts
Does anyone have a working oven controller board for a 10811 that they would
wish to sell? I have a good osc but the oven board is bad.
73,
Bill, WA2DVU
Cape May
---
This email has been checked for viruses by Avast antivirus software.
http://www.avast.com
Hi
There is no reason (at this point) to do anything other than characterize what
you have. Parts age, repairs are made, stuff happens (shock / vibration /
rain).
Bob
On Nov 17, 2014, at 10:13 PM, bownes bow...@gmail.com wrote:
Is there a quick and dirty summary of which are the good
Hi
At this point there is no “proof” that the non-GPS REF-0 will run by it’s self.
My guess is that it will operate on it’s own with faked GPS messages.
Since the REF-0 has a 10 MHz output, there is less need to immediately change
around the 15 MHz output.
The power brick would be a bit
Dark matter the source of GPS irregularities?
http://www.capitalotc.com/gps-time-glitches-probably-best-dark-matter-detector/25766/
Best regards,
Charles
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Yes, I read that yesterday. It will be interesting to hear what the
outcome of the study is.
Joe Gray
W5JG
On Tue, Nov 18, 2014 at 4:59 AM, Charles Steinmetz
csteinm...@yandex.com wrote:
Dark matter the source of GPS irregularities?
I would not mess with the power management of the unit, HP did know what
they where doing. Any clean up I would move off the unit if you want to stay
with the same OCXO you have one in the second unit.
As to phase noise before time nuts issues took up all my time low noise
signal generators
I'm sure someone here has fooled with the Si570.
I just got a few of them (CMOS output), and am about to deadbug one of
them to fool with it (unless there's some convenient protoboard out
there available.. I didn't look too long and hard, but some casual
googling didn't find one).
Looking at
I just picked up the si5351a and the thing that jumps out at mee is the 228
registers to program.
Granted it lets you create just about any frequency and there is a good
program that tells you what to set the registers to. But 228 registers is a
lot.
The traditional I2C is indeed simple. Make sure
Hello all...
Just getting up to speed on the KS-24361...
My stupid question (s)...
Where does the GPS antenna connect??
Does the GPS antenna port power the antenna?
Need a replacement for my dead HP Z3816A... ;-(
TIA...
73
Don
W4WJ
In a message dated 11/18/2014 3:26:52
On 11/17/2014 5:54 PM, Bert Kehren via time-nuts wrote:
I ground one side of the tuning diode and use the 2 to 12 V as the external
OCXO for my FRK's along with increasing the time constant. I have not
verified it but I think removing the zener Voltage should also improve ADEV.
Bert Kehren
Am 18.11.2014 um 04:02 schrieb paul swed:
Wow they are turning to gold right before our eyes.
Regards
Paul.
WB8TSL
Price is down to $150 again. And I've just ordered mine :-)
Maybe I should have taken another one, then I could do a four-cornered hat.
regards, Gerhard, dk4xp
On Mon, Nov
If you search through the recent messages, you'll see a link to a set of photos
I posted. This one
https://drive.google.com/file/d/0B5tlecUITRBLc3JyMElTdUwzMHM shows the front of
the units. J7 provides the GPS power.
Anthony
-Original Message-
From: time-nuts
On 11/18/14, 8:04 AM, paul swed wrote:
I just picked up the si5351a and the thing that jumps out at mee is the 228
registers to program.
Granted it lets you create just about any frequency and there is a good
program that tells you what to set the registers to. But 228 registers is a
lot.
The
Clue-less.
As to the good code I have only found maybe 1 site. I thought there would
be more. I think it was hackaday.
Regards
On Tue, Nov 18, 2014 at 12:58 PM, Jim Lux jim...@earthlink.net wrote:
On 11/18/14, 8:04 AM, paul swed wrote:
I just picked up the si5351a and the thing that jumps out
In the picture its the top unit ref1 and its the left hand TNC and it does
power the antenna.
If no antenna you need to tie a resistor to ground on the tnc to fake it
out.
Regards
Paul
WB8TSL
On Tue, Nov 18, 2014 at 11:49 AM, Anthony Roby ar...@antamy.com wrote:
If you search through the recent
Wonder if the ole lightning gods visited since you are in 4 land.
Regards
Paul
WB8TSL
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Jim,
thre is some info at:
http://www.box73.de/product_info.php?products_id=1869
it's all in German. If you can read that, goto Zusaztinformationen
(additional informations) where you will find a comprehensive articel
(pdf-document) also in German language (no I have not played with it).
enjoy
Yes, and the antenna voltage is 5 volts. So be sure to use a 5 volt antenna.
Tom
- Original Message -
From: Anthony Roby ar...@antamy.com
To: w...@aol.com; Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Tuesday, November 18, 2014 11:49 AM
Subject: Re:
Hi Don,
J7, marked GPS antenna is a good start. This connector also powers your GPS
Antenna.
Take care
Peter
HB9DQY
On 18 Nov 2014, at 11:49, Anthony Roby ar...@antamy.com wrote:
If you search through the recent messages, you'll see a link to a set of
photos I posted. This one
I have one of these: http://sdr-kits.net/PA0KLT_Description.html
built with the CML output Si570 that goes to 1417 MHz (!)
There is a schematic in the assembly manual that's linked to from that
page. They use 100n and 1n capacitors in parallel on Vdd and 4K7 pullups
on SCL/SDA. They have 100n
On 11/18/14, 10:24 AM, Götz Romahn wrote:
Jim,
thre is some info at:
http://www.box73.de/product_info.php?products_id=1869
it's all in German. If you can read that, goto Zusaztinformationen
(additional informations) where you will find a comprehensive articel
(pdf-document) also in German
On 11/18/14, 11:19 AM, Orin Eman wrote:
I have one of these: http://sdr-kits.net/PA0KLT_Description.html
built with the CML output Si570 that goes to 1417 MHz (!)
There is a schematic in the assembly manual that's linked to from that
page. They use 100n and 1n capacitors in parallel on Vdd
TNX Paul and Anthony...
More questions... ;-)
I see that the REF1 type unit outputs 15MHz...
The REF0 unit has both 15MHz and 10MHz...
So, if I am going to use GPS, I need REF1, but it only does 15MHz out,
and I need 10MHz for my stuff... so how do REF1 and REF0 interface??
Or does it
TNX Peter!!
I had only seen a picture of REF1, with no GPS connector!!
73
Don
W4WJ
In a message dated 11/18/2014 1:07:07 P.M. Central Standard Time,
pch@gmail.com writes:
Hi Don,
J7, marked GPS antenna is a good start. This connector also powers your
GPS Antenna.
Take care
Hi Paul...
No... As a matter of fact, it stoped working down if Florida a few
years back. Went into the ALARM mode and that was it!! Had
a HP Rb box, so didn't worry about it too much.
Moved to Texas a few years ago... Rb box on the shelf, so decided
to fire the 3816A up and see what
Peter...
OOOPS... Had only seen a picture of REF0 which has no GPS port!!
73
Don
W4WJ
In a message dated 11/18/2014 1:07:07 P.M. Central Standard Time,
pch@gmail.com writes:
Hi Don,
J7, marked GPS antenna is a good start. This connector also powers your
GPS Antenna.
Take
The item is (back) on ebay which has pretty good pictures
321560316836
-pete
On Tue, Nov 18, 2014 at 12:19 PM, Don Murray via time-nuts
time-nuts@febo.com wrote:
TNX Peter!!
I had only seen a picture of REF1, with no GPS connector!!
73
Don
W4WJ
In a message dated 11/18/2014 1:07:07
Thats because everything is supr-dupr secret in them. I have a mighty
seriously dead z3801. I picked up for $ zip. Well fact is its still mighty
dead. :-)
I am generally pretty good at reverse engineering. But when it goes in the
micro or asics or fpga's. Life gets near impossible especially with
Don
The two units work together by a buggy cable from what I have heard so far.
The Ref0 is the master that drives stuff it connects to REF1 that
disciplines REF0.
If GPS goes away or the ref1 it all keeps ticking. This is been teh system
design for about 20 years.
Many of us have the ref1 only
Hi Charles and Joe,
Read this, and hopefully you get smarter than from the write-up you linked:
http://arxiv.org/pdf/1311.1244v2.pdf
I could not find any attempt at sensitivity scale required, and thus the
feasability of actually detecting these deviations.
From a quick look at it, I have a
Hi Jim:
A number of hams have built VFOs using this chip, for example here's some data:
http://www.cliftonlaboratories.com/si570_kit_from_k5bcq.htm#Frequency_Spectrum
Mail_Attachment --
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
Hi Rick:
When working on Tunnel Diode amplifiers we used (AFAICR) 5.1 V Zener diodes to stabilize the lower voltage that drive
the diode.
5.1V was supposed to have excellent temperature characteristics in terms of repeatability (don't remember if low noise
was part of the selection criteria).
Don - rather than repeat info that has been posted over the course of the past
3-4 weeks, suggest you start here
https://www.febo.com/pipermail/time-nuts/2014-October/087274.html
Anthony
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Don Murray via
Hi all
The easiest setup to get 10MHz out of the15MHz is using a SiLabs5351C and
program it 15MHz in and 10MHz out. You have 8 outputs you can define.
Pics of my setup here
https://www.dropbox.com/s/h5qrxwfb3fkshen/IMG_1465.JPG?dl=0and here
I read the article and thought it would make for an interesting crowd sourced
project if the sensitivity is large enough to build a distributed sensor
network with GPSDOs.
On Nov 18, 2014, at 17:15, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
Hi Charles and Joe,
Read this,
Hi:
I've received the components of the Z3810A system and have some 8x10 color glossy photographs with circles and arrows
and a paragraph on the back of each one explainin' what each one is for. But need to find the connectors to make up the
DC power cables.
Yes below about 4v is the only place where you get the real Zener effect,
as you go above 5v it becomes Avalanche Breakdown. The trick is zener effect
has a negative tempco and avalanche a positive one (I thinkthey are
opposite senses anyway :-)) ) the result is a regulator diode
Hi Magnus:
Maybe it's moot. If a hunk of dark matter that's 0.75 of Earth's radius is inside the GPS orbit there's likely to be
bigger issues.
Mail_Attachment --
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
Yes, 5.1V Zeners (or something like that) have a magic zero tempco if
you put a conventional diode in series with it. I used to know
stuff like that during the Jurassic period.
However, the diode in the 10811 is ovenized, so that is not so
important. 6.2V was chosen to get +/- 5V tuning range,
Hi
Any data on the measured phase noise performance at 10 MHz?
Bob
On Nov 18, 2014, at 3:20 PM, pch.tns pch@gmail.com wrote:
Hi all
The easiest setup to get 10MHz out of the15MHz is using a SiLabs5351C and
program it 15MHz in and 10MHz out. You have 8 outputs you can define.
Pics
HI
Actually there are three different approaches to the “double 5 MHz” question.
Roughly 99.99% of all doubler / tripler OCXO’s out there do the trick with a
simple single transistor stage and a tuned tank. Follow it up with a tuned
single transistor output amp. Cheap, easy, not very fancy,
Hi
Hmmm …. dc power cables …. chop end off un-used serial cable… attach proper
wires to power supply.
(Yes, if you get the wires backwards things get a bit exciting … I have
empirical evidence to support this claim).
Since the running current is well below 1A on each connector, you don’t
Hi
The GPS antennal goes into the TNC connector on the left hand side of the front
panel. The box sources +5V power for an antenna.
Bob
On Nov 18, 2014, at 11:29 AM, Don Murray via time-nuts time-nuts@febo.com
wrote:
Hello all...
Just getting up to speed on the KS-24361...
My
I just noticed this on Ebay. The seller has several other related
items but the pricing is kind of confusing. No a lot of info.
http://www.ebay.com/itm/GPS-DISCPLINED-CLOCK-GPSDO-10M-OUTPUT-SQUARE-WAVE-/111514491254
-Arthur
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time-nuts mailing list
Hi
I suppose that if they are on “$50 off SALE” at $150, you need to list them at
$200 for some period of time.
Regardless of the why - yes, get them now. That’s a very good price for all you
are getting.
Bob
On Nov 18, 2014, at 11:49 AM, Gerhard Hoffmann dk...@arcor.de wrote:
Am
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
ADEV and phase noise testing on that one …
Bob
On
This is the strangest unit I have ever seen.
No documentation.
Morion OCXO
http://www.morion.com.ru/eng/
From St. Petersburg :)
I cant make out any part number.
except this number on the front panel:
06109a_y145_09
Google gives me nothing.
I might buy one just for the hell of it.
-George
On
Hi
Most charts show the temperature coefficient going through zero around 5V and
passing 2 mV/C in the vicinity of 6V.
Bob
On Nov 18, 2014, at 12:10 PM, Richard (Rick) Karlquist
rich...@karlquist.com wrote:
On 11/17/2014 5:54 PM, Bert Kehren via time-nuts wrote:
I ground one side
The other marking on the unit is BG7TBL
do a Google search of images, interesting
Wonder who it is ?
-pete
On Tue, Nov 18, 2014 at 3:34 PM, xaos x...@darksmile.net wrote:
This is the strangest unit I have ever seen.
No documentation.
Morion OCXO
http://www.morion.com.ru/eng/
From St.
Well, how about this:
http://www.cart100.com/Product/42336500072/
Same unit as eBay about 10 bucks cheaper.
-G
On 11/18/2014 07:03 PM, Pete Lancashire wrote:
The other marking on the unit is BG7TBL
do a Google search of images, interesting
Wonder who it is ?
-pete
On Tue, Nov 18, 2014
You can see a similar product by this seller direct -
http://www.cart100.com/seller/bg7tbl/
http://www.cart100.com/Product/38848104218/
Looks like a similar product at almost 3 time the Ebay price.
There are more photos at the second link under 'specifications'
and you can read MV89A on the
Hi
I’d say this has the look of a hobby / semi-pro project. I’ve seen several of
them done in other areas. Somebody comes up with a pile of parts at the local
market and does a board that at least sort of makes them work. Often they are
based on some sort of open source effort. Without more
In China they do it differently from what we do here: they tame the
oscillator, and sometimes they discplined it as well :)
In a message dated 11/18/2014 15:24:12 Pacific Standard Time,
golgarfrinc...@gmail.com writes:
BG7TBL sounds like an amateur radio callsign.
Alan
On Tue, Nov 18, 2014 at 5:24 PM, Bob Camp kb...@n1k.org wrote:
Hi
I’d say this has the look of a hobby / semi-pro project. I’ve seen several
of them done in other areas. Somebody comes up with a pile of parts at the
local market and does a
Hi
Single stage NPN 2N5179 or 2N918 or 2N or … biased to generate a collector
current that looks like a “raised cosine” (see your 1952 RF transmitter
textbook). Tune the collector to the desired output. Set the Q to something
like 10 or so. Linear “class A” stage after that. Tune the
Hi
… and indeed it is one. There are a whole range of this and that pieces of test
gear designed by the guy.
Bob
On Nov 18, 2014, at 7:28 PM, Alan Hochhalter alanh...@gmail.com wrote:
BG7TBL sounds like an amateur radio callsign.
Alan
On Tue, Nov 18, 2014 at 5:24 PM, Bob Camp
The cheaper unit has no patch wires. Interesting.
Seems that he put a lot of work in the unit.
Too bad the information on the software is non-existent.
Cheap enough though.
-G
On 11/18/2014 07:24 PM, Bob Camp wrote:
Hi
I’d say this has the look of a hobby / semi-pro project. I’ve seen
Hi
The guy’s email *might* be: bg7...@126.com
That also could be something else entirely.
Bob
On Nov 18, 2014, at 7:34 PM, Bob Camp kb...@n1k.org wrote:
Hi
… and indeed it is one. There are a whole range of this and that pieces of
test gear designed by the guy.
Bob
On Nov 18,
Sounds like the plot for a good scifi movie.
Joe Gray
W5JG
On Nov 18, 2014 3:57 PM, Brooke Clarke bro...@pacific.net wrote:
Hi Magnus:
Maybe it's moot. If a hunk of dark matter that's 0.75 of Earth's radius
is inside the GPS orbit there's likely to be bigger issues.
Mail_Attachment --
Brooke,
Maybe, but maybe not. It's not a dark hole either. It supposedly does
not interact very good with normal matter. It can be moot if the
interaction is so weak that it only gives itself away in sub-ns level
towards picoseconds or less, so that it becomes difficult of monitoring
it at
I also use the same method though I am partial to IFR 510 FETs as I recall.
Heck it just works and has for about 10 years.
But that said this is Time-nuts and folks get pretty touchy about lots of
things.
So though these methods work I do wonder about noise and such.
Regards
Paul
WB8TSL
On Tue,
Hi
Done with some care, they have little or no phase noise impact on a good 5 MHz
oscillator. The OCXO manufacturers would do something else if it did. Rip open
some oscillators and take a look. It’s as good a use as any for that pile of
dead parts sitting under everybody’s bench.
Bob
On
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
Yes, a lot of consumer protection laws forbid advertising a sale price unless
there is an actual reduction. Some require that the original price quoted be
the actual price within a defined period, e.g. within the last 90 days. eBay
may also have it's own rules.
In the case of this item, I
Hi
After a bit of time with Mr. Google, I think it’s pretty clear that it’s an
amateur project board. The same guy / outfit has a number of RF modules and
instruments. The seem to show up mainly on the Russian and Chinese sites. I
suspect that there is an article on each somewhere out there.
Hi,
The low Q values has the benefit of being very phase stable.
Low Q dips can be put in to null out particular overtones, LCR-series
loading the signal to ground at suitable place. Also very traditional
1930-1950 era.
Cheers,
Magnus
On 11/19/2014 01:30 AM, Bob Camp wrote:
Hi
Single
Hi
Since the main source of these appears to be the one guy, I’d bet the split
units that show up are from people doing buy and re-sell from him. One
alternative to paying eBay premiums for that sort of service would be some sort
of co-op buy from people on the list. I have absolutely no idea
Hi
For the limited temperature swings that most labs have, and the sort of ADEV
that the OCXO has, a Q up to 10 can be tolerated pretty well. Keeping the parts
count down to two to four coils and a few capacitors lets you do it without a
lot of complex design tools. They did it with charts
Indeed. I was just pointing out that high-Q approaches might not always
works as you would think, but there is a way around it if you need.
Cheers,
Magnus
On 11/19/2014 02:17 AM, Bob Camp wrote:
Hi
For the limited temperature swings that most labs have, and the sort of ADEV
that the OCXO
It looks like the boards, without front panel, connectors, etc., are available
from this source.
http://h5.m.taobao.com/awp/core/detail.htm?id=38848104218
Unfortunately, I don't speak the language but I might be able to guess the
price.
___
time-nuts
Hi
Yes Bob is back on his silly “don’t go overboard” rant ….
We often get excited about things that matter at the 1x10^-15 level when
looking at what is a 1x10^-12 level problem. One good example is distribution
amplifiers. Another are things like multipliers. What ever horrid thing they
are
Hi
Mr. Google is your friend when it comes to web page translations.
The nice thing about that page is that you can easily see the 2003 date code on
the OCXO. That’s a bit long on the stock room shelf for parts on a board made
in 2014. The date codes match up with the eBay MV-89’s we’ve been
Nice write up, all of us on bench W enjoyed it. :-)
73,
Kris, WT5V
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Brooke Clarke
Sent: Tuesday, November 18, 2014 4:42 PM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts]
Jim-
Do you need to tune it? The 571 is the VCXO - but if you're feeling
adventuresome you could drive the 570 as an NCO (numerical) via its i2c
interface.
NS
On Tuesday, November 18, 2014, Jim Lux jim...@earthlink.net wrote:
On 11/18/14, 11:19 AM, Orin Eman wrote:
I have one of these:
big 7 table
Don
Bob Camp
Hi
The guy’s email *might* be: bg7...@126.com
That also could be something else entirely.
Bob
On Nov 18, 2014, at 7:34 PM, Bob Camp kb...@n1k.org wrote:
Hi
… and indeed it is one. There are a whole range of this and that pieces of
test gear designed by the
Dear Perry:
I would be pleased to receive the PDF and schematics,
Many thanks for your efforts in this matter.
Boutsen Jan PhD ON4MMW
Leopoldplein 28
3500 Hasselt
Belgium
jan.bout...@telenet.be OR ( jan.bout...@pandora.be )
- Original Message -
From: Perry
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