Meaning home=home ? just kidding. ,long staying constant
73 de Ulrich
In a message dated 9/24/2017 8:45:35 A.M. Eastern Daylight Time,
mag...@rubidium.dyndns.org writes:
Hi,
On 09/24/2017 02:30 PM, Bob kb8tq wrote:
> Hi
>
>
>> On Sep 23, 2017, at 9:39 PM, Hal Murray
struments used in performance test are
>> traceable to a national standards body.
>>
>> So whats referred to as calibration is in reality performance
validation.
>>
>> How do I know this by becoming friendly with the local lab and years ago
>> when i worked for govt
good point
In a message dated 9/17/2017 2:01:01 P.M. Eastern Daylight Time,
jim...@earthlink.net writes:
On 9/17/17 9:42 AM, KA2WEU--- via time-nuts wrote:
> Simply call it " Make it to meet specification", N1UL
>
>
> In a message dated 9/17/2017 12:39:32
bration is in reality performance validation.
>
> How do I know this by becoming friendly with the local lab and years ago
when i worked for govt i used to moonlight at one of the local cal labs.
>
>> On Sep 17, 2017, at 8:57 AM, KA2WEU--- via time-nuts
<time-nuts@febo.com> wrote:
>&
body.
So whats referred to as calibration is in reality performance validation.
How do I know this by becoming friendly with the local lab and years ago
when i worked for govt i used to moonlight at one of the local cal labs.
> On Sep 17, 2017, at 8:57 AM, KA2WEU--- via time-nuts
&l
Modern test and radio equipment have self calibration capabilities, older
analog do not. Calibration is not always need for just simple test, but
for specification conformation it is useful. A bit of luck also helps.
In a message dated 9/17/2017 8:08:00 A.M. Eastern Daylight Time,
To all:
I would highly recommend not to buy used test equipment on e-bay , mine
(R) or HP or similar.
These pieces are mostly out of calibration , defective , just too expensive
to repair. I have 3 XSRM systems, which I co designed in 1970, they came
from e-bay and needed $ 5000 + to be
Used to be the best around ...
In a message dated 8/23/2017 8:28:07 P.M. Eastern Daylight Time,
druc...@sonic.net writes:
I am selling my HP 3048 phase noise test set as I don’t use it that much
anymore. Complete with 5316 counter, 3561 and 3585 spectrum analyzers, and
PC with windows
ettled.
>>>
>>> Thanks, Ulrich
>>>
>>> In a message dated 8/14/2017 9:10:45 P.M. Eastern Daylight Time,
david.bengt...@gmail.com writes:
>>> Ulrich - Did anyone ever agree to help update this?
>>>
>>> Regards
>>>
&
In a message dated 8/14/2017 9:10:45 P.M. Eastern Daylight Time,
david.bengt...@gmail.com writes:
Ulrich - Did anyone ever agree to help update this?
Regards
Dave
On Fri, Mar 11, 2016 at 3:13 PM, KA2WEU--- via time-nuts
<_time-nuts@febo.com_ (mailto:time-nuts@febo.com) > wrote:
Who is selling "used" Cesium standards ? Ulrich
In a message dated 8/1/2017 3:32:46 P.M. Eastern Daylight Time,
mag...@rubidium.dyndns.org writes:
Hi Skip,
Björn called me and made me aware of your need. I had already seen it
briefly, but I was doing a music festival, så no ability
A similar topic is in
http://ieeexplore.ieee.org/document/7138792/
73 de Ulrich
In a message dated 7/22/2017 6:15:58 P.M. Eastern Daylight Time,
mag...@rubidium.dyndns.org writes:
Fellow time-nuts,
I thought that I should write a few lines about the EFTF-IFCS, so a good
start
Here is something of further interest:
_The impact of thermal energy on cross spectrum PM noise measurements_
(http://ieeexplore.ieee.org/document/7546809/)
_Yannick Gruson_
(http://ieeexplore.ieee.org/search/searchresult.jsp?searchWithin="Authors":.QT.Yannick%20Gruson.QT.=true)
;
It must be almost 2 PM in the morning ! Congratulations , can I help ?good
luck , Ulrich
In a message dated 7/1/2017 7:52:54 P.M. Eastern Daylight Time,
att...@kinali.ch writes:
Moin moin,
Our group (where I am doing my PhD) is currently looking for PhD or Postdoc
candidates. Our
Yes I need one for 1 day, not to keep
In a message dated 6/7/2017 3:19:37 P.M. Eastern Daylight Time,
scmcgr...@gmail.com writes:
Ulrich
I have an operational 8640
Content by Scott
Typos by Siri
> On Jun 7, 2017, at 11:35 AM, Dave Daniel wrote:
>
> There is, or
yes, I need it for about 1 day.. Thanks, Ulrich 1UL
In a message dated 6/6/2017 9:37:35 P.M. Eastern Daylight Time,
brent.ev...@gmail.com writes:
Seems a bit sacrilegious no?
Just kidding - wish I had another myself..
Brent
KD4VMM
On Tue, Jun 6, 2017 at 9:05 PM, KA2WEU--- via time
Hi , I am trying to find an well working HP 8640 to do some measurements
like SSB FM and AM noise.
Who can help ? 73 de Ulrich N1UL
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2 points:
First I do not get copies of my own mail... strange .
Second a complete treatment including the results is in
http://ieeexplore.ieee.org/document/7546729/
These results are superior to other publication , and the paper is
complete. Probably only very few do a complete
That is the pragmatic deflection reply . but essentially you are
correct
In a message dated 2/6/2017 7:57:26 A.M. Eastern Standard Time,
kb...@n1k.org writes:
Hi
One could easily spend years answering this sort of question. Several
people on the
list *have* done so. Two of them
Not quiet, using the crystal also as filter gives much better numbers ,
73 de Ulrich N1UL
In a message dated 2/6/2017 7:30:33 A.M. Eastern Standard Time,
rich...@karlquist.com writes:
I would say the 2 stage "Driscoll" oscillator is the
way to go. I have had good luck with it up to
A optimized Colpitts circuit
73 de Ulrich
In a message dated 2/6/2017 5:30:17 A.M. Eastern Standard Time,
rtoporow...@gmail.com writes:
Good morning,
What's the optimal oscillator topology for low phase noise (low frequency
noise and phase noise floor) for 25Mhz/50Mhz/100Mhz
Happy holidays to all. If you have some time and are interested I am
still looking for specialized help to give my book
http://www.wiley.com/WileyCDA/WileyTitle/productCd-0471520195.html
a new life as I drifted in to Meta Material Based Structure based Signals
Sources.
The key missing
...@earthlink.net writes:
On 12/4/16 11:46 AM, KA2WEU--- via time-nuts wrote:
> Who has a good recommendation for a switching power supply circuit, 12V
DC
> in, 4 V/ 500mA out , Exactly 3.3 for IC voltage.
>
do you need 4V or 3.3V?
I'd start with one of the modular parts we've been d
Who has a good recommendation for a switching power supply circuit, 12V DC
in, 4 V/ 500mA out , Exactly 3.3 for IC voltage.
73 de Ulrich
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http://www.classicbroadcast.de/downloads/rohde_XSD.pdf
Greetings,
I am surprised that this is the 2.5 MHz (XSD)and not the new 5 Mhz
crystal. XSD2 ) Bernd Neubig , on distribution always has a wealth of
information
and part.
There was a later R ( XSD 2 ) 5 MHz frequency standard,
In a message dated 10/30/2016 6:07:56 P.M. Eastern Daylight Time,
davidwh...@gmail.com writes:
That is always the danger when using parts for characteristics not
guaranteed in the specifications.
YES
Sometimes a process just becomes obsolete necessitation new parts to
be fabricated on a
It has to do with the manufacturing process and a reduction in cost. I can
not speak for other companies, Infinion "killed" the good phase noise
performance but the large signal noise is not specified in the data sheet so
they are legally "clean"
In a message dated 10/30/2016 4:56:38
I typically buy a full box ( 1000) , ask them what they consider as a
replacement ...
In a message dated 10/30/2016 4:59:13 P.M. Eastern Daylight Time,
hmur...@megapathdsl.net writes:
> http://cache.nxp.com/documents/data_sheet/BFG135.pdf?pspll=1
The usual suppliers say that it's no
Absolutely ! But not with 2N3904 but rather with a
http://cache.nxp.com/documents/data_sheet/BFG135.pdf?pspll=1
In a message dated 10/30/2016 3:27:36 P.M. Eastern Daylight Time,
scott.j.sto...@gmail.com writes:
Does your text provide a good discussion of the implications of
Well, i guess both statements are correct.
Most of us (Poddar and I ), and the leading Crystal Oscillator houses (
Axtal, Morion and Wenzel ) and others know the limits imposed by the
crystal and the semiconductor. I have several patents how to do it better
(noise
canceling technique)
Some references, e-mail addresses do not work, see Ref. 8, I hate this
https://en.wikipedia.org/wiki/Colpitts_oscillator
7 S. Sarkar, S. Sarkar, B. C. Sarkar. _"Nonlinear Dynamics of a BJT Based
Colpitts Oscillator with Tunable Bias Current"_
http://read.pudn.com/downloads84/sourcecode/comm/322249/pll_matlab[1]/pll_ma
tlab/pll2/colpitts.pdf
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g.
I think you mean "treatise".
Pete.
On 10/29/2016 8:05 PM, Attila Kinali wrote:
> Hoi Ulrich,
>
> On Sat, 29 Oct 2016 19:56:53 -0400
> KA2WEU--- via time-nuts <time-nuts@febo.com> wrote:
>
>> The Parzen book was on my list (Amazon ), I find these books,
spel .
At the end of the day the winner is the one with the best understanding and
the best products, no doubt about it .
73 de Ulrich N1UL
In a message dated 10/30/2016 12:29:37 A.M. Eastern Daylight Time,
dk...@arcor.de writes:
Am 30.10.2016 um 01:56 schrieb KA2WEU--- via time-nut
The Parzen book was on my list (Amazon ), I find these books, including
Rhea's book practically useless as they do not provide the necessary non
-linear noise analysis, and do not have real live examples with test data.
Cerda's "Understanding Quartz Crystals and Oscillators book I have not
recommendations for one or more book(s) that are definitely
worth skimming through, or reading?
On Sat, Oct 29, 2016 at 3:12 PM, KA2WEU--- via time-nuts
<_time-nuts@febo.com_ (mailto:time-nuts@febo.com) > wrote:
Some useful literature
_https://en.wikipedia.org/wiki/https://en._
(https://
Some useful literature
https://en.wikipedia.org/wiki/Phase_noise
https://en.wikipedia.org/wiki/Colpitts_oscillator
Some links seem not to work 73 de Ulrich
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You guys never give up, happy Sunday
In a message dated 10/9/2016 2:46:02 P.M. Eastern Daylight Time,
mag...@rubidium.se writes:
Hi,
Agree. However, one need to make sure that the counter triggering never
flukes a measurement.
There is a few things missing to make it work much much
To all :
I have all the necessary high end phase noise test SYTEM up to 50 Ghz here
at 07457 NJ , if any one needs measurement help , 73 de Ulrich , N1UL
Sent from my iPhone
xxx
> time-nuts mailing list --
I can not find the item on EBAY , Ulrich
In a message dated 10/3/2016 11:51:24 A.M. Eastern Daylight Time,
jn6...@gmail.com writes:
According to my -hp- catalogs it was available only in rack-mount form, not
in a cabinet. That suggests it was being marketed to a specific small group
so
what is the link ?
In a message dated 10/3/2016 10:34:35 A.M. Eastern Daylight Time,
jn6...@gmail.com writes:
I saw that. Is it really rare or just hype by the luster?
Jeremy
On Monday, October 3, 2016, Bert Kehren via time-nuts
wrote:
> There is a rare HP clock
There are no (rarely maybe ) stupid questions, mostly silly answers
In a message dated 8/17/2016 5:03:07 P.M. Eastern Daylight Time,
elfchief-timen...@lupine.org writes:
Wouldn't you also not be able to actually sync to the individual chips,
since you can't really see the start of any
-177dBm /Hz at 300 deg SSB phase noise is correct, not because AM/ FM but
Single Sideband Energy .
In my last QEX paper I showed the measured AM and FM levels and how to
calculate them.
73 de Ulrich
xx
ntributing additive noise of its own.
Another possibility might be cross-spectral collapse due to correlated
thermal noise from the splitter.
-- john, KE5FX
Miles Design LLC
> -Original Message-
> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of KA2WEU--
&
NO, the maximum possible noise dynamic range is ( 177 + Pout) [dBm] -
Transistor large signal NF ( dB),
the signal to noise ration is dimensionless
In a message dated 8/11/2016 5:00:43 P.M. Eastern Daylight Time,
j...@miles.io writes:
Or rather -(177+DUT output power in dBm).
See below
In a message dated 8/11/2016 4:30:47 P.M. Eastern Daylight Time,
j...@miles.io writes:
Remember that L(f) is expressed in dBc/Hz, not dBm/Hz. If it were dBm/Hz,
then kT would be the limit. But in dBc/Hz terms, the limit is 177 + the
DUT's output power in dBm - transistor
Good morning,
the difference between the two phase noise FWSP systems is the lower noise
internal 10 MHz reference crystal oscillator (optimized ) as well as
also some of the internal FSWP circuits custom optimized . The output power
was 17 dBm, but we also have build one oscillator
The _time-nuts@febo.com_ (mailto:time-nuts@febo.com) reformatted the
offset / phase noise table so it became almost unreadable compared to the
original , sorry,
Ulrich
In a message dated 8/10/2016 8:00:28 P.M. Eastern Daylight Time,
time-nuts@febo.com writes:
Test Equipment
Test Equipment Improvement
The measurement of the 100 MHz XO was done on an improved R FSWPs.
Measured data is in the table below:
XO 100 MHz
FSWP SN 101143
FSWP SN 101192
Offset
Phase Noise in dBc/Hz
0.1 Hz
-45.24
detail of events, show where ideas came up, was re-invented,
incorporated and extended. Edson clearly contributed.
Cheers,
Magnus
On 08/07/2016 06:32 PM, KA2WEU--- via time-nuts wrote:
> Here is another comment ;
>
>
> this paper is too self-centered for it to be the reliable
is more about people and events and very little since ...
Ulrich
In a message dated 8/6/2016 2:26:54 A.M. Eastern Daylight Time,
michaeljwout...@gmail.com writes:
On Sat, Aug 6, 2016 at 9:34 AM, KA2WEU--- via time-nuts
<time-nuts@febo.com> wrote:
> Leeson produced a
and events and very little since ...
Ulrich
In a message dated 8/6/2016 2:26:54 A.M. Eastern Daylight Time,
michaeljwout...@gmail.com writes:
On Sat, Aug 6, 2016 at 9:34 AM, KA2WEU--- via time-nuts
<time-nuts@febo.com> wrote:
> Leeson produced a somewhat random selection
, 2016 at 9:34 AM, KA2WEU--- via time-nuts
<time-nuts@febo.com> wrote:
> Leeson produced a somewhat random selection of papers , omitting
important
> things like the sapphire based best in the word . This was not even
> referenced .
The reference [145] at the end of the sentenc
The story is quite simple, life is never fair and therefore some use more
elbow then others ,
Happy weekend, 73 de Ulrich N1UL
In a message dated 8/6/2016 1:00:38 A.M. Eastern Daylight Time,
rich...@karlquist.com writes:
On 8/5/2016 12:47 PM, Tom Van Baak wrote:
> Here's a new
Yes, a good book ! Ulrich
In a message dated 8/6/2016 7:00:41 A.M. Eastern Daylight Time,
csteinm...@yandex.com writes:
Rick wrote:
> It has always irked me that no credit was given to Edson
> He is the proverbial "unsung hero"
Hardly unsung. Harvard PhD Sigma Xi as a Gordon McKay
Some of the cited references are poor, modern non-linear mathematic is kind
of omitted . After all the oscillator phase noise speculation, I would
have really liked to see at last a reference about the most modern
measurements techniques and it validation. How do you calibrate a phase noise
This is in reference to
Here's a new article, on IEEE's site (and this one's free):
"Oscillator Phase Noise: A 50-Year Review", by David B. Leeson
http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7464875
In a message dated 8/5/2016 4:48:59 P.M. Eastern Daylight Time,
ka2...@aol.com
A good filter in the cable is highly recommended, 5 KOhm & 1000 uF cleans
many things
In a message dated 8/1/2016 11:12:51 A.M. Eastern Daylight Time,
kb...@n1k.org writes:
Hi
It’s just very standard FM modulation math. The only gotcha is the
(often unknown) bandwidth of the EFC port.
_http://www.microwavejournal.com/articles/26593-m%C3%B6bius-metamaterial-ins
pired-signal-sources-and-sensors_
(http://www.microwavejournal.com/articles/26593-möbius-metamaterial-inspired-signal-sources-and-sensors)
Ulrich
___
time-nuts
I will be there too, which ham repeater ? N1UL
In a message dated 5/8/2016 1:00:35 P.M. Eastern Daylight Time,
bneu...@t-online.de writes:
I will be I will arrive on Monday late afternoon.
Looking forward to meeting you and other Time Nuts soon
Bernd Neubig - DK1AG
AXTAL GmbH & CO.
I got a large reply to give the 8662 away, let the old/new one arrive and
be ok, and the first one who contacted me will get mine. Good luck with the
repair of the power supply. The 8662 works correct occasionally, starts up
and then not but is in specs.
I will be in San Francisco IMS /MTT
The problem is solved, A German surplus dealer has/had bunch of these
generator, calibrated and with guarantee for less then $ 3000. And in good
shape.
Who wants the old one .. no cost , power supply in trouble , Ulrich
In a message dated 4/15/2016 10:01:56 P.M. Eastern Daylight Time,
Thanks
In a message dated 4/15/2016 10:02:01 P.M. Eastern Daylight Time,
scmcgr...@gmail.com writes:
Silicon investigations repairs them. Google the name for website
Content by Scott
Typos by Siri
On Apr 15, 2016, at 6:38 PM, John Miles wrote:
>> My signal generator
Thanks, I do not have a repair manual and I hate to abandon the signal
generator after man years of positive use... Ulrich
In a message dated 4/15/2016 9:14:21 P.M. Eastern Daylight Time,
paulsw...@gmail.com writes:
Ulrich
To your first question I am unaware of anyone that repairs
My signal generator has a poor, intermittent power supply. The RF
section is ok. Who can please tell me which company can and will fix these
older
but excellent generators?
Thanks, Ulrich
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http://scholarcommons.usf.edu/cgi/viewcontent.cgi?article=2270=etd
In a message dated 3/20/2016 5:33:21 P.M. Eastern Daylight Time,
mag...@rubidium.se writes:
Ulrich and Attila,
As you read the appendixes of ITU-T Rec. G.823, G.824 and G.825 they
will not give very detailed
http://joerg-berkner.de/Fachartikel/pdf/2000_AKB_Berkner_1f_noise.pdf
In a message dated 3/20/2016 5:33:21 P.M. Eastern Daylight Time,
mag...@rubidium.se writes:
Ulrich and Attila,
As you read the appendixes of ITU-T Rec. G.823, G.824 and G.825 they
will not give very
Thanks, Ulrich
In a message dated 3/20/2016 5:33:21 P.M. Eastern Daylight Time,
mag...@rubidium.se writes:
Ulrich and Attila,
As you read the appendixes of ITU-T Rec. G.823, G.824 and G.825 they
will not give very detailed information, but hints. The flicker noise
model comes from Jim
I am interested in this topic too, thanks, Ulrich
In a message dated 3/20/2016 4:10:12 P.M. Eastern Daylight Time,
mag...@rubidium.dyndns.org writes:
Attila,
On 03/17/2016 10:56 AM, Attila Kinali wrote:
> Moin,
>
> Measurement we recently did showed some quite unexpected behaviour
>
The HP 5065A Rubidium Frequency Standard requires a circular 3 pin adapter
cable that can be plugged into 115V AC outlet.
I checked all cables I have and this particular cable is not finable. Can
the unit set to 110/220 V
Maybe this cable can be purchased or assembled ? ULRICH
In my closet I found one of these, any merit to play with it ?
Ulrich
In a message dated 3/14/2016 5:00:28 P.M. Eastern Daylight Time,
lars.walen...@hotmail.com writes:
Hi
Shouldn´t 5x10^-11 over 50C be 1x10^-12 / C? So with 2-4°C variation it is
2-4x10^-12.
What about pressure
Good morning ,
what is wrong with the Standford Research Rubidium standard with a 1
sec sync pulls form a GPS satellite ?"
Ulrich
In a message dated 3/13/2016 10:16:11 A.M. Eastern Daylight Time,
kb...@n1k.org writes:
Hi
With “real” (who knows how real) Rb based GPSDO’s selling
Why don't you look at the outline to determine what might be needed or
missing .
Ulrich
In a message dated 3/11/2016 11:09:51 A.M. Eastern Standard Time,
att...@kinali.ch writes:
Hoi Ulrich,
On Mon, 7 Mar 2016 19:52:58 -0500
KA2WEU--- via time-nuts <time-nuts@febo.com>
Thanks, that why I try to keep it alive, Ulrich
In a message dated 3/9/2016 5:08:51 P.M. Eastern Standard Time,
brent.ev...@gmail.com writes:
Ulrich -
I checked my bookshelf last night and sure enough, Rhode's "Digital PLL
Frequency Synthesizers - Theory and Design" is still sitting
Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of KA2WEU---
via time-nuts
Sent: Tuesday, March 08, 2016 11:57 AM
To: rich...@karlquist.com; time-nuts@febo.com
Cc: enrico.rubi...@gmail.com
Subject: Re: [time-nuts] PLL book 3rd edition
yes, but the underlying math
meters. 73 - Mike
Mike B. Feher, EOZ Inc.
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 office
908-902-3831 cell
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of KA2WEU---
via time-nuts
Sent: Tuesday, March 08, 2016 11:57 AM
To: rich...@karlquist.com
Correct, unless yo want to sell PLL chips, DDS and NCO's and their use
needs to be explained ! Ulrich
In a message dated 3/8/2016 2:01:33 P.M. Eastern Standard Time,
jim...@earthlink.net writes:
On 3/8/16 8:27 AM, Richard (Rick) Karlquist wrote:
>
>
> On 3/8/2016 3:18 AM,
Yes, we need the same properties at R in Munich
Ulrich , N1UL
In a message dated 3/8/2016 11:15:36 A.M. Eastern Standard Time,
steph@wanadoo.fr writes:
Here at CERN in particle accelerators we're not looking at the same
properties for PLLs than one would require for radiocom.
Two
yes, but the underlying math and system architecture will/would be
exciting.
Thanks, for the comments, Ulrich
In a message dated 3/8/2016 11:29:25 A.M. Eastern Standard Time,
rich...@karlquist.com writes:
On 3/8/2016 3:18 AM, ka2...@aol.com wrote:
> Good Morning,
> technically you
Yes, and an extension of my book should address these issues
Ulrich
In a message dated 3/8/2016 10:02:33 A.M. Eastern Standard Time,
jim...@earthlink.net writes:
On 3/8/16 12:19 AM, Stéphane Rey wrote:
> Hi Rick,
>
> There are hopefully many applications where monolythics PLL can't
>
a chip, but the chip is built by Keysight's captive
foundry which doesn't sell much to the merchant market.)
No criticism of the book; it's just a market issue.
Rick N6RK
On 3/7/2016 4:52 PM, KA2WEU--- via time-nuts wrote:
> To all :
>
> I have published the following book
>
>
In a message dated 2/16/2016 9:03:59 A.M. Eastern Standard Time,
time-nuts@febo.com writes:.
http://www.synergymwave.com/articles/2016/calculation-of-fm-and-am.pdf
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16-microwave-application-award
My team and I will continue to work on ultra-low noise oscillators by
applying "Möbius Strips and Metamaterial Symmetry: Theory and Applications"
for
mm wave applications and
Did my plot make it ? Ulrich
In a message dated 1/16/2016 7:01:41 P.M. Eastern Standard Time,
r...@nc0b.com writes:
I did some interpolation to compare the specs for phase noise of the 8660
the way it was done then to the present method. I think it is going to be
something like -105
Typically,one should not look at just on offset point, Here is an example.
73 de Ulrich
In a message dated 1/16/2016 7:01:41 P.M. Eastern Standard Time,
r...@nc0b.com writes:
I did some interpolation to compare the specs for phase noise of the 8660
the way it was done then to
I know Zoya for many years, this ham business is a good idea.Give her my
best regards , Ulrich
In a message dated 11/11/2015 7:00:42 P.M. Eastern Standard Time,
r...@nc0b.com writes:
The EE department at the University of Colorado has an enlightened
professor.
I find it difficult in NJ to find seasoned RF engineers...Ulrich
In a message dated 11/11/2015 9:02:03 P.M. Eastern Standard Time,
kb...@n1k.org writes:
Hi
Well, if you sit down with a bunch of these people and talk to them, you
find out some interesting things:
1) When the job
This oscillator seems to have been more a frequency standard then a noise
standard. Today's 10 MHz oscillators are different/better, such a crystal is
no longer available/made.
I have more experience with 100 MHz, 125 and 128 MHz. Once I am back in the
USA I will send some measured
Yes, more the termination Ulrich
In a message dated 10/28/2015 9:02:56 P.M. W. Europe Standard Time,
mag...@rubidium.dyndns.org writes:
Hi,
It is well worth mentioning that a crystal filter on the output can
become a challenge, as the source impedance can be far from 50 Ohm, and
I have bought and measured the hp10811 at about -174dBc/Hz. The
interesting thing is the feedback capacitor from collector to base which
changes
Rin=1/gm.
Unless the circuit has a hidden Q mulitplier the PN (SSB) can never be
better then 177 (kT) in dBm + Pout in dBm - NF of the
Good Morning, link does not work, Ulrich
In a message dated 8/30/2015 9:00:49 P.M. Eastern Daylight Time,
mag...@rubidium.dyndns.org writes:
Hi Ulrich,
On 08/30/2015 09:58 PM, KA2WEU--- via time-nuts wrote:
> This is the measured phase noise of the 10 MHz output. Not quite st
Who can help me with the connection information ?
http://www.ebay.com/itm/HP-10811-60165-Double-Oven-CRYSTAL-OSCILLATOR-10Mhz-
/281062658455
Ulrich
In a message dated 8/13/2015 4:10:33 P.M. Eastern Daylight Time,
paulsw...@gmail.com writes:
OK I can contribute at
How good or bad is the 10811 and which one on ebay is a better choice ?
I am looking for a very goo 5 MHz crystal oscillator with documentation .
Thanks, Ulrich N1UL
In a message dated 8/8/2015 7:16:37 P.M. Eastern Daylight Time,
kb...@n1k.org writes:
Hi
Ok, so John’s observation
These are better summary papers :
http://www.qsl.net/va3iul/Phase%20noise%20in%20Oscillators.pdf
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.309.5449rep=rep1t
ype=pdf
73 de Ulrich N1UL
In a message dated 8/2/2015 6:24:05 P.M. Eastern Daylight Time,
well, the Pierce oscillator does not give that much freedom, the steady
state loop gain should be Pi (about 3) as the RF Gm = Gmo/pi.
This analysis does not address the important SSB noise gut guaranties
oscillation.
In testing enough a loaded Ql of Qp/2 is best for power
Good questions , I am looking forward to the answers, this is my area of
work ... Ulrich N1UL
In a message dated 7/28/2015 1:45:55 P.M. Eastern Daylight Time,
dk...@arcor.de writes:
Am 20.07.2015 um 01:57 schrieb KA2WEU--- via time-nuts:
Good evening, this turns out to be a good
73 de Ulrich, N1UL
Update on crysral oscillators
Techniques minimize the phase noise in crystal oscillator circuits
Poddar, A.K. ; Rohde, U.L.
Frequency Control Symposium (FCS), 2012 IEEE International
DOI: 10.1109/FCS.2012.6243701
Publication Year: 2012 , Page(s): 1 - 7
] On Behalf Of
KA2WEU--
- via time-nuts
Sent: Saturday, July 18, 2015 3:40 PM
To: time-nuts@febo.com
Cc: akpod...@synergymwave.com; alexander.r...@rohde-schwarz.com
Subject: Re: [time-nuts] how to find low noise transistors
BFG540
That's what I mean -- both BFG540 and BFG591 have been
, 2015 at 4:59 AM, John Miles j...@miles.io wrote:
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of
KA2WEU--
- via time-nuts
Sent: Saturday, July 18, 2015 3:40 PM
To: time-nuts@febo.com
Cc: akpod...@synergymwave.com; alexander.r...@rohde
Good evening, this turns out to be a good discussion...
Any more inputs ? 73 de Ulrich
In a message dated 7/19/2015 7:13:39 P.M. Eastern Daylight Time,
rich...@karlquist.com writes:
On 7/18/2015 2:16 AM, Attila Kinali wrote:
I always wonder how you figure out whether a transistor
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