Allow me to add some comments to this subject.
Five month ago I set out to make a DMTD that would be $ 200 max and be such
that any one can build it with readily available parts. The unit also
includes five counters yielding a resolution of 1 E-15. Using five counters
not
only gives Allan Va
I am not familiar with FWIW 100. Tell me more. ThanksBert Kehren
In a message dated 1/25/2010 8:22:30 A.M. Eastern Standard Time,
david.partri...@dsl.pipex.com writes:
FWIW 100 boards will likely cost not a great deal more (say $5-20 depending
on board size than ten.
Dave
-Origi
Bob, the mixer/Filter op amp schematic is a direct copy of the NBS unit
with late model op amps, comparator and an opto coupler in stead of the
transformer. Isolation amps are actually MINI CIRCUITS the next version will be
op amps. I will ask Richard to release the counter schematic. Since
Going from 10 boards to 100 will reduce board cost by about 10%. Depending
of the final version the qty. 10 cost will be either $ 29 or 36.That
is for mixer and counter board. Take out $9 if you will not use the counter.
Bert
In a message dated 1/25/2010 8:44:29 A.M. Eastern Standard
Before any body gets upset, I said before I used the wrong price
calculator. The present mixer/counter takes up 4.3 by 5.3 inches, can be
separated
into two boards and in 100 qty would be $ 9.60 with silk screen and solder
mask. Bert Kehren
In a message dated 1/25/2010 12:10:43 P.M. Ea
Depends on what your definition of major coin is. Is the Tube good? What is the
condition of the oscillator? Bert Kehren
-Original Message-
From: Richard W. Solomon
To: time-nuts@febo.com
Sent: Thu, Jan 28, 2010 12:31 pm
Subject: [time-nuts] FTS 5030 Comments ?
I saw an FTS 5030
Has any one done testing on the Austron 1150 oscillator module,
specifically Allan Variance.
Thank you Bert KehrenMiami
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The HP 5062C is not a "Primary Standard", and that is why it is called a
"Reference" because it uses a different transition of Cesium 133 with the
frequency of 9192.631,774,3 MHz which does not meet the definition of a second
and resulted in a relative short product life even though modified
Hi,
C field will not get you on frequency with what you read right now, are you
sure you are on the right peak?
Bert Kehren
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a
Hi,
let me start out with a disclaimer, I have sold several HP 5061A through a
friend on ebay including the two recent HP 5062C's, the reason I do not do
it direct is, he does it full time and he has the ability to get them
packed professional. We have had no complaints all where tested and
I recently got hold of a Comstron FS2000 in the HP 7 form factor (most
likely part of a custom job) but I remember some one commenting on the unit
a while back. Unit is marked not functional, but would like to know more
about it before I decide to do something with it, like tearing it apa
Good morning
I have a more fundamental question. Having three 10811-5071 all with Allan
Variance from 1 to 100 Hz well below 1 E-12 one as low as 6 E-13 why would
I want to mess with them at all?
Bert Kehren
In a message dated 3/28/2010 8:32:12 A.M. Eastern Daylight Time,
li...@rtty.us wr
I would not feel comfortable tearing into the unit.
Controlling its environment and power to it yes.
I did that with a 10811 and a 10544 years ago by drilling a 20 foot hole
in my Dallas backyard lowering the units in it with support electronics in
place and sealing the shaft with individual
I did retrieve it many times that is why I had all those sand bags with #
strings and that time the cost of an oscillator was much higher and I tried
putting the bags in and out several times before the oscillators went down
there including leak test for moisture penetration.
Bert
In a me
I am still looking for them this was eighteen years ago and I was not in to
it and used it as a poor man's frequency standard. I only joined time nuts
last year, have learned a lot and am just now putting in place equipment
to measure. Still waiting for Corby to complete some tests to release
Good morning Brian.
What do you use as an OFF SET oscillator?
Thank you
Bert Kehren Miami
In a message dated 3/29/2010 11:31:15 P.M. Eastern Daylight Time,
kilodelta4foxm...@gmail.com writes:
Your correct - your also keeping me up past my bedtime !- I got to
be 9
Is there a way you can post it on time-nuts?
Thank you
Bert Kehren
In a message dated 3/30/2010 9:10:19 P.M. Eastern Daylight Time,
kilodelta4foxm...@gmail.com writes:
We'll the "A"s are the package with the BNC connector.
The "B"s are for OEM equipment, they had 6 pins and a smaller pla
Would you mind sending it direct to me at _ewkeh...@aol.com_
(mailto:ewkeh...@aol.com) as an attachment? You know we are in the test phase
of a Dual
Mixer and we are also running tests with the 10514 A and B along with the
SYPD-1. The next board will accept the footprint of the 10514 B. B
Thank you Karesz.
I will contact you direct and we can look at what needs to be done. Nothing
Fancy. Bert
In a message dated 5/11/2010 10:59:17 A.M. Eastern Daylight Time,
szeke...@gmail.com writes:
Hi Bert,
I can help you in PCAD schema drowing(i.e. as xxx.pdf output too)_have a
litl
ws
there is no NIH here, please share how you do it for $ 10, I always like to
learn, and I have not been a member that long. Is there a link to a
specific design? Thanks Bert
In a message dated 5/11/2010 1:47:15 P.M. Eastern Daylight Time,
warrensjmail-...@yahoo.com writes:
For the R
Allow me to apologize to start this again. Bert
In a message dated 5/11/2010 7:25:39 P.M. Eastern Daylight Time,
warrensjmail-...@yahoo.com writes:
(My apologies to all, this is a game Bruce and I play every time I bring
up
my simple tester.)
Bruce wrote:
>"So you now actually integra
I know John and I can take care of it contact me direct.Bert
In a message dated 5/18/2010 7:32:29 A.M. Eastern Daylight Time,
electronicsandbo...@yahoo.com writes:
I want to buy a service manual of the Datron 1081 on ebay, it
em=390062405476 . The seller wont sell it to me. Is there so
Who is Electr. Goldmine. How do I contact them. Bert Kehren
In a message dated 5/27/2010 6:15:50 P.M. Eastern Daylight Time,
lstosk...@cox.net writes:
For anyone wanting to add LF EM shielding to a project, Electronic
Goldmine has a weekend special of UltraPerm at $5 for an 8X11 inch
Thank you. Bert Kehren
In a message dated 5/28/2010 7:35:23 A.M. Eastern Daylight Time,
stanley_reyno...@yahoo.com writes:
- Original Message
From: "ewkeh...@aol.com"
To: time-nuts@febo.com
Sent: Fri, May 28, 2010 6:21:02 AM
Subject: Re: [time-nuts] Mu Metal
Who is Electr.
Thank you. Place order for four sheets Bert Kehren
-Original Message-
From: Stanley Reynolds
To: Discussion of precise time and frequency measurement
Sent: Fri, May 28, 2010 7:43 am
Subject: Re: [time-nuts] Mu Metal
http://www.goldmine-elec-products.com/prodinfo.asp?number=G16
Whish you would have told me I could have ordered some extra and shipped
them to you in priority flat rate envelope. Maybe some one else will order
some, double postage does not make sense. Flat Rate Priority is $14.00
Bert Kehren
In a message dated 5/28/2010 3:30:33 P.M. Eastern Daylight T
I have not seen any plots on the 260 or E1938A on this site, I have only
been on for a year, how ever I have a "few" 10811s" that Corby Dawson ran for
me all below 1 E-12 one as low as 4 E -13 in the 1 to 100 sec. range. My
problem is that Corby's file size is 900K and I have not found a way
If it is always stable at 5x500.32 and has the lock light on than it
has to be in the PLL.
Bert Kehren
In a message dated 6/12/2010 4:36:39 P.M. Eastern Daylight Time,
rfn...@arcor.de writes:
John,
it's been a while since I digged deeper into it, but I remember having
had problems
Adrian
I have also a FTS 1200 that is 2 Hz off at 5 MHz and can not be tuned to
5 MHz, have not dug into it yet. But first I would check the tuning range of
your OCXO depending as to which one it is the tuning voltage should go
past 5 Volt.
If you see peaks on the current with the Osc. abov
Adrian, maybe I missed something which oscillator does your unit have? Bert
-Original Message-
From: Adrian
To: Discussion of precise time and frequency measurement
Sent: Sun, Jun 13, 2010 6:08 pm
Subject: Re: [time-nuts] Odd FTS 4060 Behavior
John,
yep!
The OCXO out of the
Adrian,
you did actually broke it down to the inside oven level. Is there any thing
to look out for. I have a FTS 1200 that has a problem 2 Hz off but I have
been reluctant to open it up. Any advice?
Thanks Bert
In a message dated 6/14/2010 6:02:38 A.M. Eastern Daylight Time,
rfn...@a
Thank you Adrian
I did print out the instructions and one quiet day I will go for it. Thanks
again
Bert
In a message dated 6/14/2010 7:17:58 A.M. Eastern Daylight Time,
rfn...@arcor.de writes:
Bert,
I was surprised how easy oven disassembly was.
Remove the 4 (8?) screws that hold the co
What is time-nuts recommendation for a good maybe bets GPS receiver with
most accurate 1 PPS output?
Thanks Bert Kehren Miami
In a message dated 6/24/2010 10:00:17 A.M. Eastern Daylight Time,
rbenw...@verizon.net writes:
Ulrich,
Thanks for the info, I didn't think it was a bug, I just was
Attilia
What you want is basically a Shera Board. That design has been around for
quite some time and has served me very well. I have a total of six running
including two controlling Rubidium. There are in my opinion a couple of
problems: not every 4066 works on the design the 18 bit D/A is v
Stanley
the faster counter also has the jitter, no change, as long as it is not
tied to the input frequency. The 24 MHz is not unique, the 100 MHz is same
technology just four times faster and thus gives me smaller steps on the D/A
and since I use it on Rub. the full range of the 18 bit cove
Going from 24 to 100 MHz only gives you smaller steps (resolution) every
thing else stays the same.
If the he saw 2 to 3 nsec should be more like 8, going to 100 MHz will
improve it by a factor of 4. In a redesign of the total system I would have two
sample sizes maybe stay with 30 or go to 5
Stanley
I am not an expert but it is not only the jitter it is the fact that since
the two sources are not linked the independent drift of the 100 MHz causes
a distribution of the count. Again even with the same resolution the count
error will be four X and the subsequent correction will be t
Stanley
Let me try one more time after that I give up maybe some one else can try.
If the time between the GPS signal and the reference drifts by 100 nsec.
the counter in the Shera 24 MHz board will detect it and based on that make
the decision to change the D/A to compensate for it at a rate
I do not think I can answer that question the way you present it. It
depends to a large degree on what you want to use it for. If you want to
multiply to microwave frequency there are 100 MHz units out there with
excellent
low phase noise in the $ 400 to $1400 price range, if it is Allan Var
Hi,
just a clarification, I did write 4066 it is a 4046 that I replaced. Take
a look at the MCP 4822 dual 12 bit D/A In the data sheet they have an
example using one for coarse, the other for fine steps, I realize that the
transition is not perfect but maybe code can compensate for the tran
Not being able to write code and not understanding what is required it is
easy for me to suggest a fix. In the case of a good Rub. the annual aging
rate is 1 E-10 which would mean the lower 12 bits would cover one month.
During transition the PIC could modify the time constant and at the same
Hi
The problem with the 10811 is the wide distribution. You do not know what
you get. I am in the fortunate position that eight out of ten 10811 are way
below 1 E-12 between 1 and 100 seconds one even out to 1000 seconds. As a
matter of fact some of the plain 10811's are better than the 10811
Exactly, and I think that goes for most Osc. That you and I can afford.
Bert
In a message dated 6/29/2010 8:18:12 A.M. Eastern Daylight Time,
sar10...@gmail.com writes:
Hi,
So it goes without saying that you really don't know what you have
unless you can test it in some way. It's OK look
Corby did it using his NBS Dual Mixer set up, the one I am now in the
process to duplicate with the D/M using a five channel counter. As soon as the
test results from the three testers are in a final mod will be done and
than a $ 200 D/M with its own counter will be available.
Bert
In a
Hi
for many 16 bits will do and one other alternative is do a design that will
also work with the AD 1861. I know it is hard to get but in the last year
I found a sizable volume on ebay, convinced them to lower their price,
bought some my self and posted it on time-nuts. With a group effort I
Hi
just bought four AD 1861 on ebay with shipping was $11 each. Will see
what I get, but they are out there and 18 bit will cover in my opinion most
applications
Bert
In a message dated 6/29/2010 12:21:31 P.M. Eastern Daylight Time,
li...@rtty.us writes:
Hi
Summing a pair of DAC's and
Hi again.
Any one interested should hold off for a day buying. I have contacted the
seller asked how many he has and what a quantity price would be. To much
interest and the price will go up. I think the market for audio equipment
replacement is shrinking and there will be more reasonable offe
Hi again
This seller has 95 AD1861 in stock. Is there a reason why they would not
work for all applications. No I do not get a cut. 95 would justify to do a
new design but I am convinced there will be plenty more.
Bert
In a message dated 6/29/2010 1:57:54 P.M. Eastern Daylight Time,
ewke
Lets see what Richard says. I have just gone through that with my D/M which
is in its second test phase and I did ship boards oversees. May do that
one time.
Bert
In a message dated 7/1/2010 9:13:57 A.M. Eastern Daylight Time,
j.bastemei...@tudelft.nl writes:
Dear Richard, and other Tim
Stanly
I have shipped in the last couple of month boards to NZ and Germany. No
problem, but you have to make sure for Europe no lead, is an option with
Expr. PCB, may want to include a copy of the invoice that clearly shows no
lead. An old cut up padded envelop in a regular envelop with cust
There is an interesting article describing the Quartzlock E8000 series of
GPSDO's in the June 2010 Microwave Journal. It goes into details as to
method used. Worth reading.
Bert Kehren
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You do not need a pico amp meter all you need is a digital multi meter that
has a 10 M ohm input resistance. Bert Kehren
In a message dated 7/7/2010 9:23:52 P.M. Eastern Daylight Time,
paulsw...@gmail.com writes:
Completely agree congrats and thanks for the update.
I may be getting back i
Ulrich
not having a 3805 can you please explain the scale.
Thank you
Bert Kehren
In a message dated 7/13/2010 6:12:47 A.M. Eastern Daylight Time,
df...@ulrich-bangert.de writes:
Antonio,
attached is a recording of my Z3805's EFC along July 11. Times are in UTC.
Best regards
Ulrich
>
Ulrich,
thank you for the info. I think that 2 E-10 per dayis the best argument
for any Rubidium.
Bert
In a message dated 7/13/2010 8:05:25 A.M. Eastern Daylight Time,
df...@ulrich-bangert.de writes:
Bert,
lacking a 3805 manual my guess is that the 3805 EFC scale may be considered
the s
Hi
I noticed a HP 5061A in Australia with a patek-philippe clock movement on
ebay. The clock will be worth some thing, even if the tube is bad! May
compensate for the risk you take.
Bert Kehren
In a message dated 7/13/2010 12:19:58 P.M. Eastern Daylight Time,
li...@rtty.us writes:
Hi
It
Thanks Ulrich
2 E -10 seems high and a straight line on a double oven is what I would
expect, looking at a month or two may tell more. Also what is the change in
ambient temperature? With Rubidiums in the less than $100 range I think it
is the best bang for a buck.
I am still waiting for th
Hi
For the ones that are not able to get DIP I have in the past installed a
SOIC on a repair by using wires I saved from resistors that I had to cut and
soldered them into the holes, formed them, put the SOIC in place and
subsequently connected to the IC. Since it is only one it can be done i
Hi,
ten years ago not having a super counter I copied the input circuit of
the Austron 2110 that using an XOR gate mixes 5 MHz with 500 Hz getting
5.0005 MHz. It is devided down to 1.0001 Mhz which in turn is mixed in 74 HC 74
D F/F giving 100 Hz, that most counters are able to count at hig
Hi,
Bob since has explained how the 1.0001 MHz are generated. My Austron uses
a Xtal filter. If you want a scan of the circuit contact me direst. The
resulting 100 Hz out of the D F/F results in a high resolution representation.
1 Hz is equal to 1E 6. If you now count the 100Hz with a counte
Hi
I know I am repeating my self but reading Brian's experience with a FRS and
the Shera controller, here I go again. Not having any luck contacting
Brooks Shera, I did fool the controller with hardware changes and have very
good results controlling a FRK-H. Comparing it with a Cesium, it is
What could you help with? Bert
In a message dated 7/28/2010 3:05:26 P.M. Eastern Daylight Time,
wpxs...@gmail.com writes:
Bert,
I for one, would be interested in that.
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ht
Yes, you are absolutely right and I have tried to get Richard to do it.
Bert
In a message dated 7/28/2010 4:47:46 P.M. Eastern Daylight Time,
p...@phk.freebsd.dk writes:
In message <4c5092fa.2030...@xtra.co.nz>, Bruce Griffiths writes:
>Instead of copying the Shera controller albeit with
One more comment $ 40 would cover every thing including PC board, May go up
to 50 depending what D/A you use. Bert
In a message dated 7/28/2010 4:47:46 P.M. Eastern Daylight Time,
p...@phk.freebsd.dk writes:
In message <4c5092fa.2030...@xtra.co.nz>, Bruce Griffiths writes:
>Instead of
Nigel
I do not think so. Early on I did try a Tbolt and did run a comparison with
my Cesium, maybe I did something wrong, but to me it looked like they
where changing the OCXO frequency to correct timing. I got rid of it and
instead modified my Shera for Rubidium.
Any comments out there fr
I assume that some one will donate their time end effort like I am
presently doing on the Dual Mixer I have spend in excess of $1000 on the
project
and untold hours and do not expect any payback. I thought that is what
time-nuts is all about.
Bert Kehren
In a message dated 7/28/2010 6:06
Hi
I think it would be nice to have a show of hands as to how many are locking
a Rb to GPS and what they use.
Bert Kehren
In a message dated 7/29/2010 4:00:31 A.M. Eastern Daylight Time,
p...@phk.freebsd.dk writes:
In message <60eb5e7c69594f49b830463dc322e...@athlon>, "Ulrich Bangert"
Arnold
what do you use? Bert Kehren
In a message dated 7/29/2010 7:02:06 A.M. Eastern Daylight Time,
arnold.ti...@gmx.de writes:
I do, and I am also interested on other improvements!
Regards,
Arnold
Am 29.07.2010 12:49, schrieb ewkeh...@aol.com:
> Hi
> I think it would be nice to hav
Arnold
how are you controlling the Rb with the Tbolt? Bert
In a message dated 7/29/2010 11:10:16 A.M. Eastern Daylight Time,
arnold.ti...@gmx.de writes:
Bert,
I'm using at the moment a thunderbolt (with spare for testpurposes
using ext. other oscillators), a nice PRS10, a FRK-HLN-1A (5MH
Arnold
Have you actually done it with the PRS10 and what was the result?
Bert
In a message dated 7/29/2010 1:52:08 P.M. Eastern Daylight Time,
arnold.ti...@gmx.de writes:
No problem for the PRS10 - there is an external pps input.
For the FRK-RbO I don't have a practical solution yet,
beca
Thank you Brooke
I have only been with this group for a year so I am not aware of all past
dialog.
What has been the result driving the PRS10 with an external source and
was it a GPS or a Tbolt? I am not trying to be cute but if there is an
alternative with test data I would like to buy one
A couple of month ago I was contacted concerning a HP 105. Do to a computer
problem I lost all info. Please contact me again.
Bert Kehren
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Paul
Frankly I do not think I will live long enough to see a time nut build a
fountain Rb. Over the four years I have watched many smoke and mirror
projects with nothing coming out of is. In German we have a saying: paper is
patient. We should walk before we run.
Many members did buy a FE 568
In a message dated 12/4/2012 6:10:36 P.M. Eastern Standard Time,
docdai...@gmail.com writes:
I will build one right away.. but I didnt see your request. My problem is
surface mount components (the multipin or no leads)... I am not confident
in that. but I would certainly try. I am not
Chris
There is a low cost solution and I have the input circuit perfect for GPS
on a $1 gate array I have boards and am presently using Shera original
version. Would like to buy his version 402NE but have not been able to get a
response from him. Have repeatedly asked for help on this list fo
How about quit talking and build something and show us some results!
Bert Kehren
In a message dated 12/6/2012 2:09:38 P.M. Eastern Standard Time,
d...@nap-us.com writes:
Bob,
Did Atmel (AVR) kill your dog or something?
They have some pretty powerful MCU's. Are you flatly stating that none o
Paul
I agree. That is my main frustration, lot of talk no results. The good part
of time nuts is that I have made some very good contacts that share my
interest of actually building some things and results are great.
Remember the Loran simulator?
Bert Kehren
In a message dated 12/6/2012 1
We have a choice of two dual mixers, my copy of the original NBS with minor
changes and Bill Riley's unit. Comparison tests are ongoing to pick the
best. If Bill's shows better results I plan on laying one out using leaded
components. 2 channel and 4 channel counters are completed and are bei
Rex, let me check status and I will get back with you by Thursday. I am
presently finalizing a detailed outline of the total package.
Bert
In a message dated 12/10/2012 7:23:43 A.M. Eastern Standard Time,
r...@sonic.net writes:
Bert,
I have been waiting for more details to become availab
As Corby said oven control
Bert Kehren
In a message dated 12/11/2012 2:47:03 P.M. Eastern Standard Time,
p...@petelancashire.com writes:
Thanks
This weekend I'll stick a microphone inside a piece of tubing and go
"looking".
The singing only occurs when the unit is in LOOP OPEN or OPER m
Maybe some one with good Synergy connections can convince them that an
overseas time-nut can buy and pay but use an US time-nut for shipping that in
turn will forward it. I understand the cost involved for a Synergy because
of the paperwork, but I ship regularly oversees with USPS as some of
Brooks Shera has been a major contributor with his GPSDO. Before Tbolts
where affordable his QST article for the first time opened the door for many
amateurs to precision frequency at an affordable price. Over the years I
build many units. For a year I have tried to buy his latest version
Some how time nuts combined two lines it is
Karen Stoll46 Crazy Rabbit Rd Santa Fee, NM 87508
In a message dated 12/19/2012 3:55:33 P.M. Eastern Standard Time,
ewkeh...@aol.com writes:
Brooks Shera has been a major contributor with his GPSDO. Before Tbolts
where affordable
I will contact her and see mybe she may also need help to dispose of
hardware and we can arrange a sale.
Bert
In a message dated 12/21/2012 9:15:56 A.M. Eastern Standard Time,
paulsw...@gmail.com writes:
Bert
A thought has crossed my mind here.
His wife can not access his computer.
If its
I have send an email and will find out what help she would accept, but
there is time when a snail mail is very powerful, and I again encourage all of
you to take the time to write a snail mail note. Maybe he can still
recognize it, but putting my self in Karen's place it will lighten her load
John
I send my posting to Mrs. Stoll for approval prior to posting. Lets try
not to start the usual arguments. Brooks deserves better.
Bert Kehren
In a message dated 12/21/2012 4:28:38 P.M. Eastern Standard Time,
j...@febo.com writes:
And folks, please respect Brooks' privacy -- remembe
Lets call it what it is waste of time and money
Bert Kehren
Sent from Samsung tabletBob Camp wrote:Hi
As far as I can see, you would do *much* better with a surplus HP counter (sub
$200 or even sub $100) and some sort of pre-scaler.
Bob
On Dec 28, 2012, at 2:51 AM, Bruce Griffiths wrote
I do feed a Rb in to all my istruments including my 7 spectrum analser. I
had two choices 301 or create 100 Mhz. There blank modulrs available but make
sure you get one with power module, power comming from the mainframe is if I
recall 48 KHz.
Bert Kehren
Sent from Samsung tabletDavid Ki
Ulrich
you beat me to it, we have been using lately the ICS 512 and 570 for some
of our projects. If symmetry is not required 80 MHz and a 74 AC 90 will do,
if symmetry is a must the only low cost way I know is 160 MHz and a $ 2
MAX3000A gate array. We actually did a symmetrical divide by 3
How about getting back to basics.
Is it a one off, if production how many and what are the specification
requirements? Otherwise on this list it can go on for a year.
Bert Kehren
In a message dated 1/4/2013 6:11:14 P.M. Eastern Standard Time,
wlfuq...@uky.edu writes:
At 07:51 PM 1/4/2013
I do not have a LPRO nor a schematic but all Efratom units I have played
with have identical loops. They also use the 1 uF capacitor for sweeping.
Adding an other larger capacitor in parallel and the sweep slows down and you
can observe 127 Hz behavior.
Bert Kehren
In a message dated 1/20
The delay is mainly do to the fact that the promise to do the drawings did
not materialize. The counters are done and tests on variations of the D/M's
are ongoing since the noise floor is not the counter but the D/M.
Bill Riley's boards are out there and it would be nice to get some feedback
You can buy today the Bill Riley board and there are few boards of a change
with larger SMD also today available. Once we release a final S M D version any
one that wants to buy only a board that ia an option, the same will also be
available in through hole.
Bert
Sent from Samsung tabletJero
I did get one bad one leak or pin hole aging so much that it would have run
out of tuning range in a month
Bert Kehren
In a message dated 2/27/2013 7:24:25 P.M. Eastern Standard Time,
jmi...@pop.net writes:
Sounds like a bad OCXO. The crystal frequency jumps slightly, and the
disciplini
Have one of those at 100 KHz.
Bert Kehren
In a message dated 3/7/2013 4:39:46 P.M. Eastern Standard Time,
eb4...@cembreros.jazztel.es writes:
http://s1338.beta.photobucket.com/user/EB4APL/media
/CAM00431R_zps07fdcbf4.jpg.html
___
time-nuts mailin
Having built a few portable frequency sources my recommendation based on
your application and what is reasonably available today would be a FE 5680A
in combination with a 100 MHz clean up XO. We have very good results with a
slightly modified what I call the Dorsten PLL-VCXO by W-H-Rech. I c
Brooks Shera passed away last Saturday. There will be an obituary published
tomorrow in the Santa Fe New Mexican. It should also be available online.
As I have mentioned in the past I credit him with making available to time
nuts, radio amateurs and other hobbyists a method to obtain precise
I encourage every time nut to read Brooks attached obituary. Very
impressive
For those that want to send a note, again
Karen Stoll
46 Crazy Rabbit Rd.
Santa Fe, NM 87508
Bert Kehren
_http://www.legacy.com/obituaries/lamonitor/obituary.aspx?n=e-brooks-shera&p
id=163780430#fbLoggedOut_
(ht
Brooks GPSDO may be 15 years old but is still perfect for today's
applications. If you look at tvb's Tbolt plot or Ulrich's plots with and
without
sawtooth correction for a day or two the limit is GPS. The basic unit has a
resolution of 1.73 E-13 in mode 7. Brooks uses a 40 bit filter. I hav
Bruce, would you mind being more specific and offer a solution.
Thanks Bert Kehren
In a message dated 3/25/2013 7:09:41 A.M. Eastern Daylight Time,
bruce.griffi...@xtra.co.nz writes:
The lack of synchronisers when crossing clock domains is a design flaw
that should be corrected.
Bruce
As to the latest code Brooks did not release compiled or ASM code. Prior
codes where released with an agreement. In due time his wife Karen Stoll will
make a decision that will satisfy time nuts.
Stay tuned.
Bert Kehren
In a message dated 3/25/2013 6:13:56 P.M. Eastern Daylight Time,
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