Attila
Any opinion or observation on Mean Well's SD series, they are a key
component on most of our projects.
Bert Kehren
In a message dated 8/31/2014 6:51:13 A.M. Eastern Daylight Time,
att...@kinali.ch writes:
On Sat, 30 Aug 2014 01:58:40 +
Mark Sims hol...@hotmail.com wrote:
Aug 2014 07:15:02 -0400 (EDT)
Bert Kehren via time-nuts time-nuts@febo.com wrote:
Any opinion or observation on Mean Well's SD series, they are a key
component on most of our projects.
I never had the pleasure to measure any of the Mean Well DC/DC converters.
Looking at their spec, they seem
Tom
Thank you for the information on the OSA 3210
This is what I know. OSA 3000 is the Cs module only with three OCXO
versions B-5400, 8602 and 8612. All the pictures and information I have seen
and
the modules that I have, show identical boards and assemblies.
I am not aware of a later
,
On 09/04/2014 12:56 PM, Bert Kehren via time-nuts wrote:
Tom
Thank you for the information on the OSA 3210
This is what I know. OSA 3000 is the Cs module only with three OCXO
versions B-5400, 8602 and 8612.
Later versions of the OSA 3000 also had 8613. I have seen 8613 and
8602.11 myself
Can you post a picture of the board
Bert Miami
In a message dated 9/8/2014 2:20:37 P.M. Eastern Daylight Time,
adrian.valentin.constantine...@gmail.com writes:
Hello,
I have a OSA-5585 cesium PRS and it is not working.
On the local manager i have a cesium module alarm. I opened it and
or send it off list if you can not compress it.
Bert
In a message dated 9/8/2014 2:20:37 P.M. Eastern Daylight Time,
adrian.valentin.constantine...@gmail.com writes:
Hello,
I have a OSA-5585 cesium PRS and it is not working.
On the local manager i have a cesium module alarm. I opened it
I have on purpose stayed out of this discussions but I think it is time to
mention some benchmarks. Last year we did a work over of the Shera
controller when we where allowed to release assembly and hex code. In order to
make
sure that the code was solid we ran extensive tests using a 1 pps
Jason, we just did one using the ublox at 1 KHz and I have some boards
extra so if you contact me off list I will gladly send you some data and
schematic .Can be modified for 10 KHz.
Bert Miami
In a message dated 9/15/2014 9:46:35 P.M. Eastern Daylight Time,
ja...@ball.net writes:
I
Trying to help a friend with a ublox using an external antenna. Does any
one know what the voltage range on this antenna is. Trimble P/N 28367-00
Thank you
Bert Kehren
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
In my opinion the simplest and cheapest way is to use an ICS 570 it is
specked for 180 MHz but we use it repeatedly at 200 MHz.
Bert Kehren
In a message dated 9/28/2014 6:37:56 A.M. Eastern Daylight Time,
p...@phk.freebsd.dk writes:
In message
Bob we are using digital mixers in some other applications but what
surprised me is your comment on the Riley DMTD. We have a couple of slightly
modified Riley's and see any where from 1.44 to 3.84 E-14 at 1 second. Bill
also
sows data below 1 E-13 at 1 second. Presently looking at braking
Attached a picture hope it goes through Bert Kehren
You can, however, make large stacks of Peltier coolers, hot to cool,
and cool them down to liquid air temperatures. This is done on
very low noise LNA's.
-Chuck Harris
___
time-nuts mailing list
Take a look at Potato chips yes Potato I have used them with good results
Bert Kehren
330551715157
In a message dated 10/15/2014 6:44:47 P.M. Eastern Daylight Time,
kb...@n1k.org writes:
Hi
Most ECL families have more trouble with 1/F noise than fast silicon
saturated
With all the work around if you want very good performance use a Shera. We
have super results with a Morion, Shera and ublox M7
Bert Kehren
In a message dated 10/19/2014 4:08:32 P.M. Eastern Daylight Time,
kb...@n1k.org writes:
Hi
On Oct 19, 2014, at 3:35 PM, Charles Steinmetz
We did the same using a 1 KHz out of the $ 14 ubolx M7 and a Morion .
Results better than 1 E-10. Some time nuts are now assembling and testing the
same. Total cost less than $ 10 not counting OCXO or GPS. Most expensive item
is the filter capacitor.
Bert Kehren
In a message dated
Having build GPSDO's since Brooks came out with his in QST I learned a few
things and always worked on improving its performance And hopefully the FE
405B project that lasted over nine month will top any thing in GPSDO's. The
FE5680A is nearing final Beta test and hopefully will soon be out
Allow me to clarify.
I started out with 7 MV 89 one of it a total loss. The remaining 6 after 3
month + burn in show better than 1 E-11 aging per day, 2 closer to 5 E-12.
Only two have been tested for ADEV and are close to 1 E-12, 2X not 10 X.
Bert Kehren
In a message dated 10/20/2014
Karen
To a large degree it depends on what you want to use it for. HP 5065 is
considered top of the line and PRS 10 is a very nice Rb but lately I have seen
lamp oscillator failures. I like FRK, well documented easy to modify and
if done right super performance.
As part of a GPSDO project
Living in south Florida backup power is short term and long term. As lab
batteries I use T 105 also known as Golf Cart batteries. Costco has those 6
Volt 200+A batteries for less than $ 80. Super price. Yes I have Costco
stock. For charging I use a VIctron Energy Phoenix 12 V 30 A charger.
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 the HP
7 series, attenuates and most important frequency counter and
...@kirkbymicrowave.co.uk writes:
On 3 Nov 2014 02:59, Bert Kehren via time-nuts _time-nuts@febo.com_
(mailto: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
We do most our projects with Altera G/A.
The biggest benefit is that if something does not work on first pass
changing the G/A logic is much faster, less costly than a new board layout.
Bert Kehren
In a message dated 11/8/2014 6:17:29 P.M. Eastern Standard Time,
kb...@n1k.org writes:
Hi
I did it at the antenna connector at the front panel for the reason that
you just stated. At the same time I inserted a SMA connector since all my
cables and splitters are SMA. There is a pinout for SMA.
Bert Kehren
In a message dated 11/9/2014 8:28:14 P.M. Eastern Standard Time,
Joe
It is not clear to me what your goal is. Simplicity, cost or performance. A
PLL based on 1 pps is not optimum.
I call this approach GPSPLL versus GPSDO. Thanks to work done by Karen in
Moscow I found out that you can program a $14 ublox M7 to frequencies above
1 KHz. If you use 200 KHz
We are using Wenzel with two filters see attached if it will pass. 20 Mhz
is down more than 60 db and 5 MHz 55. Distribution Amp takes care of the
rest.
Bert Kehren
In a message dated 11/12/2014 8:13:33 P.M. Eastern Standard Time,
dgmin...@mediacombb.net writes:
Just a few days
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
In a message dated 11/17/2014 8:46:34 P.M. Eastern
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 think Bob mentioned it before Laptop power supplies make good power
sources. Older units like in my case an old Dell 20V 3.5 A is perfect. They
still have plenty of input and output filtering and build for lomg term
operation. Never throw away a laptop supply. Late models are lower power
A Lea-6T is only worth any extra money if you are using the sawtooth
correction data coming out of it. With out correction a $ 14 unit is just as
good.
Bert Kehren
In a message dated 11/25/2014 11:25:34 A.M. Eastern Standard Time,
michael.c...@sfr.fr writes:
You may have seen them as
I would not buy any of them unless I want a HP case on the bench. They are
all used! The present Lucent unit is HP and you get two for the price of $
150 will do the best job for you. They are new and with all the activities
presently going on at time nuts you may well end up with mods like
Rob attached is a picture of the case with the lucent in it. Just to make
sure it fits. I use these cases extensively and have gotten some in the past
for my Swiss friend. I have two tbolts in them and in one case have fan
control. Use an analog temp. control with 12 V fan. Where and how
In the recent past I did offer a board and parts for some one to take on
the PIC programming for a saw tooth correction board. No takers.My offer
still stands. One of our tem members has a nice working unit in PIC Basic not
understanding code it does how ever look very simple. I think what
Provided the unit works one simple way to get an idea as to the health of
the tube is to insert a plain multi meter in the 200 mV position. That
inserts a 10 M resistor in series and you can calculate beam current.
Bert Kehren
In a message dated 12/5/2014 8:38:07 P.M. Eastern Standard
I am looking forward to long term data on the Lucent unit. GPSDO's are
getting closer and closer to Cesium. Having worked for 18 month on two GPSDO
projects we find that the limiting factors are the Cesium Standards. Working
presently on a Cesium GPSDO. Short term OCXO, medium Rb and long
Be careful you are touching on two subjects that can turn in to long
lasting discussions. Legal shipping will be very expensive and rebuilding tubes
has been looked at in the past but short of a sophisticated lab in Russia I
doubt it could be done, the real issue who would buy one people
We are concentrating on FRK and M 100 but as I mentioned we have been
sidetracked by GPSDO work for the FE 5680A and FE 405B for the past 18 month.
We
just got back to our RB's and today I did finish the GPSDO board for the
FRK and M 100. These are analog and have a place to insert in the
We solved that problem by attaching the regulators to the FRK back plate
which is with fan control is kept within 0.01C. We did not do it for that
purpose but found that we needed some more heat in order to keep the fan in an
optimum fan speed. Rb, OCXO and Fan power transistor are on the
16 Minutes is normal. First FTS tubes do not leak as much as the old HP
tubes. Second the seller most likely did run a test which means the tube was
pumped down.
Unless there is software that tells beam current the only way I know to get
some idea of health of tube is as I mentioned before
With the exception of the HP 5065 where the Rb cell actually is the ADEV
contributor as Corby has repeatedly demonstrated with tests and if you check
the filter time constant. Most Rb's will be well served with a cleanup
OCXO.
The PRS 10 has good performance as is, but is limited by DAC
who did you buy it from?
In a message dated 12/11/2014 4:47:02 P.M. Eastern Standard Time,
drkir...@kirkbymicrowave.co.uk writes:
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 ….
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_ (http://www.ebay.com/usr/ggg*fitting?_trksid=p2047675.l2559)
when I posted a negative review refused me a refund after I
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
In a message dated 12/16/2014 7:21:02 A.M. Eastern Standard Time,
Are those not the ones that have no EFC
In a message dated 1/7/2015 3:02:20 P.M. Eastern Standard Time,
erm1ea...@ermione.com writes:
Hello!
I would like to buy 4 or 5 Milliren 260-0544-C from Excess Solutions as
it was discussed 22 october 2014, but their shipping rates are really
The GPSDO is alive and well. We have run and are running in excess of 15
units in Beta test on FE 5680, 5650 and 405 with very good results. There are
several reasons for the release delay also doe to the fact that I have
moved along with s a significant down sizing.
I will not be in the kit
The 1 pps and the output frequencies are all derived from the same XO in
the module. Up to 7 the difference in a T is that the saw tooth correction
factor is brought out for correction purposes . 7 has a much higher XO
frequency than the 5 so the saw tooth is smaller. So use a ublox 7 if you
We did a GPS PLL using ublox M7 not for time nuts but for Hams no u
processors, simple to build with readily available parts with performance of
1
E-10.. Hams still have get to gether and it would make sense to order the
parts. Boards would be less than $ 2 in quantity 10. 5X5 cm board
At my new home the GPS antenna location has turned in to a challenge. May
have to splice RG 6U. Has any one done measurements on couplings and the
loss associated with them. Right now I am considering a female, female
coupling. Is there a better alternative?
Thanks Bert Kehren Palm City
harm, then consider installing
an additional LNA inline with the antenna.
Hope it sort itself out for you.
Cheers,
Magnus
On 12/05/2015 09:28 PM, Bert Kehren via time-nuts wrote:
> At my new home the GPS antenna location has turned in to a challenge.
May
> have to splice RG 6U. H
A word of caution. In the last three years we have experienced problems
with the RS 232 interface. We know that wrong messages can contaminate the
code in the controller permanently preventing lock. We suspect switch bounce
or connect or disconnect while under power. With the cost of these
The date coming with the units was plotted at 5 MHz using DD FF and EX OR
divide by 3 with symmetrical output
Bert Kehren
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and
Shortly after joining time-nuts on Corby's recommendation I announced that
I wanted to build a complete Dual Mixer for less than $ 200. Richard
McCorkle offered to help me with the code for the counters. After completion
we
started talking about GPSDO's which I had previously worked with
Some of the suggestions offered here are incorporated in the FE
205/405/505. We have done extensive work using a 405 with very good results.
Tom did
some tests on the 406 and we traced issues back to the temperature control.
We disabled it and continue to have an excellent GPSDO. Tests are
Did finally complete my lab at the new location all instruments survived
the move. As a result of downsizing found, that I have quite a few of the old
oval shaped 3 pin power cords used by HP and Wavetek. Noticed them on ebay
for $ 25 plus shipping. I will charge time nuts $ 15 shipping
ernal crystal in a VCO to clean it up before you multiply
it
> to 1200 MHz.
>
> And you can get up to four other frequencies out of the part at the same
> time.
>
> 150 fs class jitter.
>
> $13 cost, quantity one.
>
> --- Graham
>
> ==
>
>
>
>
>
&
Move, downsizing and clean up I ran across a GPIB adapter for the Racal Dan
1992. It is available to a time nut for the cost of shipping not for
resale.
Bert Kehren
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Getting back to the original question, years ago I was told but could not
confirm that HP was buying up 5345's because of a Government commitment to
replace front ends. If they had to go to such matters I doubt we will be
able to find a solution.
In my home counter work I tried but ended up
Bruce
>
>
> On Monday, 25 January 2016 11:00 AM, Bert Kehren via time-nuts
<time-nuts@febo.com> wrote:
>
>
> With all the discussions in a small 100 MHz source I asked my project
> partner Juerg in Switzerland to run some data on the ICS 570 that we use
on the
> majo
to head the pads the rest of the way to
molten. No need for soldering irons.
Practice on junk boards until it becomes natural.
-Chuck Harris
Bert Kehren via time-nuts wrote:
> We have looked at the LMK devices but with my 74 years would not try to
> solder it. There are other neat par
With all the discussions in a small 100 MHz source I asked my project
partner Juerg in Switzerland to run some data on the ICS 570 that we use on the
majority of our projects with excellent results. Using the HP53132A we see
+ - 1 count at E10-11 ignore the large jumps those come from the
Having used FRK for over 35 years I am partial to FRK/M100. More later.
We have had some bad experience with PRS-10 failing lamp module and others
have shared the same observation. Clear sign of oxidation and we know the
unit has never been exposed to water!
Back to FRK. Previously mentioned
Corby
the M100 have conformal coatings but non of the M100's that I have tested
had potted Lamp modules.
Conformal coating is a pain but so far all we have worked on is the coil
section and scraper and brass brush did do the job.
will send you off list pictures of a bad disassembled lamp
Am I missing something? KISS. If you start out with a 10 MHz OCXO use a tvb
PIC to divide down to a lower frequency a 74HC74 to get symmetrical output
of a $ 10 u-blox 6 and the PIC and 86 XOR. If no PIC capability ebay has
LS90's for a one off.
Bert Kehren
In a message dated 4/9/2016
I do not know what U blox does but I know when we use 200 KHz out of the 1
pps output on a $ 10 ublox 6 we consistently get better than 1 E-10 closer
to 1 E-11 out of the Morion have the data
Bert Kehren
In a message dated 4/9/2016 10:01:05 A.M. Eastern Daylight Time,
kb...@n1k.org
Having been a time nut for almost 50 years knot knowing it I like to add
my thoughts. Starting in the late 60's I won second place at IEEE student
contest for my counter design using 7 segment lamp and Motorola RTL in the
70's I buried a Sulzer using bank coin bags filled with sand to close
That is also my suspicion
Bert Kehren
In a message dated 3/21/2016 4:00:43 P.M. Eastern Daylight Time,
j...@febo.com writes:
I don't need it myself, but that looks an awful lot like a Sulzer 2.5 or 5.
On 3/21/2016 9:01 AM, Bert Kehren via time-nuts wrote:
> Attached is an old Dual O
We have two PRS 10 units, one with the 1 pps disciplining circuit. Its lamp
module failed. Moving the controller board to the one without the 1 pps
circuit did not work. Does any one have done the move successfully.
Bert Kehren
___
time-nuts mailing
Did buy a HP53132a counter mainly to use with the RS 232 for high
resolution and to have a backup for my very favorite 5345a with 40 GHz head.
Sadly
the very clean unit has a very weak display to the extend that an 8 looks
like a 9. Have the option for a full refund but would like to
Attached is a picture of the Ublox GPS with 1 pps correction. It is clear
that its on board limitation is the Maxim DS 1124. An alternative would be
two Micron SY89279UMG's.
It brings up the question I had raised before control of the TCXO. Using
the house reference, a $ 4 ICS 570 and a $
Attached is an old Dual Oven Flask high performance OCXO. I do not have the
flask any more (broke) and no more info but if some one recognizes it and
wants it for the shipping, please let me know. Moving, downsizing results
in many items ending up in recycle.
Bert
Did buy display from yixunhk got here in 3 days via DHL installed works
great. Thanks for all the help on and off list but decided to buy a
replacement. The other one is readable so if some one wants it for the cost of
shipping please let me know off list. Thanks again
Bert Kehren
Sadly yes
The reason we have not released our GPSDO for the FE5690/50 and FE405 is
that we have experienced the same on all three devices. You are the 9th case
that I know of. We know very little as to what exactly causes it but we are
incorporating circuitry to prevent it. What we know is
That is why we stay with Ublox 5T for saw tooth correction and 6M for what
I call PLL applications where you can change the 1 pps to higher frequency
to be used in a PLL.
Maybe we will one of these days see 1 ns on ebay. I am sure NDA's prohibit
the company from resale of chip
Bert Kehren
Today GPS receivers are getting better by the year due to the fact that in
order to save silicon the chips are getting smaller and the clock frequency
goes up reducing saw tooth excursion. If it was not for hanging bridge
filtering it on the input of a GPSDO would be simple without info from
Col. /Professor Parkinson definitely deserves the prize, pushing GPS was
not the best career move but he had a vision and we have to thank him for his
commitment.
Attached a picture of one of his visit with his boss at TI.
A peace of trivia because of my security clearance I had to brief the
I know Corby is working on it and he will share his results. I think he is
right now on vacation that is most likely why he is not commenting.
Bert Kehren
In a message dated 5/21/2016 10:02:59 P.M. Eastern Daylight Time,
mag...@rubidium.dyndns.org writes:
Hej Poul-Henning,
On 05/20/2016
I like to disagree. In the late 90's I started to work on high efficiency
boat air conditioners for my boat, written up in Power and Motor Yacht
"COOL" January 2003. To reduce inverter load and eliminate the power of the
relays I went to zero crossing opto couplers and triacs. Used it also
You do not have to purchase an expensive 6T to get 10 KHz out even a $ 10
unit has adjustable output some rely on the battery to memories the setting
more expensive ones have EEPROM
Bert Kehren
In a message dated 5/16/2016 7:03:23 A.M. Eastern Daylight Time,
step...@tompsett.net writes:
Attached is a picture of our ublox board that we plan on making available
to time-nuts once we have the FE 5680/50 GPSDO under control so it does not
wipe out under any circumstances the memory. We will if any one is
interested in a board also make the board only available for less than $ 10
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
I get repeated requests for info on Shera mainly for Rb applications. Shera
has a successful history controlling Rb's. Two things are a problem. The
AD 1861 is not only unavailable but also never intended for precise DAC
applications. The LTC 1655 makes a perfect replacement ,16 bits is
Have been using mine for over 15 years, very handy tool and using the 1 MHz
output for very high resolution measurements.
Bert Kehren
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
My Agilent 53132 power module went bad, does any one have one for sale or
info or schematic.
Thanks Bert Kehren
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow
The reason I made the post is after bad experiences I found a vendor with
genuine product and willingness to send you data sheets and my tests confirm
data within 3%. Can not ask for more. Can tell all the stories mentioned,
been there done it, that is why I felt it will be useful for time
reliable sources, based on disappointing past experiences.
Bert Kehren
In a message dated 1/22/2017 10:00:45 A.M. Eastern Standard Time,
att...@kinali.ch writes:
Hoi Bert,
On Sat, 21 Jan 2017 08:08:22 -0500
Bert Kehren via time-nuts <time-nuts@febo.com> wrote:
> purchased _2x Sa
In the seventies I used F size NiCad’s in applications like OCXO’s later
Rb’s for power backups. Later switched to Ni-MH in all cases needed complex
charge control and cutout to protect batteries. Today I have switched to
Li-ion mainly because of the low cost reliable power management
The biggest mistake you can make if you plan to use them in series not to
equalize them before use. They come in different state of charge. Maybe
close if from the same lot but not close enough and I do not count on the
equalizer. I start with a discharge to 2.5 V and charge two at a time in
Charles,
would you please share your settings, this is exactly what we are looking
for. We are doing it by trial and error but your expertise will help
greatly.
English not being my native language linguistics are some time a problem
Thanks
Bert
In a message dated 9/1/2016 6:26:32 P.M.
maybe some one smarter than us can working with the parameters that Tbolt
makes available better performance can be achieved but it is a fact that
the frequency is being changed to compensate for time and Tom's frequency
data matches our's and we do not care about ADEV, we care about the
TBolts that
I see. Something is wrong.
>
> /tvb
>
> - Original Message -
> From: "Bert Kehren via time-nuts" <time-nuts@febo.com>
> To: <time-nuts@febo.com>
> Sent: Thursday, September 01, 2016 9:54 AM
> Subject: [time-nuts] Tbolt issues
We have been following the Tbolt power discussions but what I am missing is
the main problem with Tbolts. All the power work will not improve the
frequency performance of the unit because the frequency is constantly changed
to correct time. Tbolt is an excellent time device but not good for
Charles
would you mind sharing 1 second frequency data that you get out of the
tbolt to get an idea what is possible. Looks like we are not the only ones
trying to improve frequency performance and hopefully some one will share
settings.
Bert Kehren
In a message dated 9/10/2016 6:42:17
Yes Charles
I was not part of or following the original Tbolt discussions. My setup at
the time was Loran C with Austron 2110, backed up with Cs and 60 Khz using
a Tracor 599H. My work was focused on FRK FRS Rb’s using Shera with very
good results. At the same time Juerg was using a
There is a rare HP clock on ebay for the collectors among us. I am to old.
RARE HP H20 115BR FREQUENCY DIVIDER & DIGITAL CLOCK STANDARD VINTAGE TEST
Bert Kehren
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
ebay 351861979923
In a message dated 10/3/2016 10:15:29 A.M. Eastern Daylight Time,
ka2...@aol.com writes:
Were is it ? Is it working ? 73 de Ulrich
In a message dated 10/3/2016 10:12:51 A.M. Eastern Daylight Time,
time-nuts@febo.com writes:
There is a rare HP clock on ebay for the
I lived till last year in Miami which is a s far away from the 60 KHz
transmitter. In the 90's Junghans came to test their 60 KHz products for that
reason and as long as I lived there in my concrete slab home with steel re
enforcement I never had problems receiving 60 KHz on my multiple
Has any one opened a FTS tube it is smaller than the new HP tube, would be
nice. If not I will gladly make one available for the cost of shipping.
Bert Kehren
In a message dated 11/1/2016 1:19:16 A.M. Eastern Daylight Time,
t...@leapsecond.com writes:
> Thanks for the other good links as
Over the past there has been talk about building from scratch high
performance references. I think consensus was that it is out of reach. In the
mean
time Corby is reworking an active maser which takes a lot of know how. But
let us look at his work on the super HP5065. It is able to
Still downsizing down to 20 Costco Premium Apple boxes found a box with
OCXO's. One HP 105, a Piezo 10 Mhz looks like a HP 10811/544 knock off an
Ovenaire CSC 85-50 and a CTC 15 MHz WP-93744L1 all available for the cost of
shipping. All at one time tested, working as far back as
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
1 - 100 of 130 matches
Mail list logo
