Re: [time-nuts] HP10811 vs 00105 OCXO

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

Re: [time-nuts] how to find low noise transistors

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

Re: [time-nuts] Everything you wanted to know about Oscillators

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,

Re: [time-nuts] Everything you wanted to know about Oscillators

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

[time-nuts] HP 10811-60165 Double Oven

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

Re: [time-nuts] how to find low noise transistors

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

Re: [time-nuts] Wikipedia and Residual Phase Noise

--- via time-nuts wrote: This is a misnomer, it should be called additivephase noise. Think of a noise free oscillator with a buffer stage. This stage because of AM/PM conversion under large signal condition adds noise, makes the over all system noisier.. Ulrich Rohde In a message dated

[time-nuts] 5 x 2 x 3 = 30 MHz

I am working with this .. amazing device, Ulrich N1UL ___ 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.

[time-nuts] 5MHz Crystal Phase noise

Simulated 5 Mhz phase noise, only very little deviation from measured data. Happy weekend, Ulrich N1UL Greg2.docx Description: Binary data ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Rohde Schwarz frequency standard and controller

Good morning, I have 3 working XSRM Rubidium RS standards in use, at 60 KHz , the short term stability is better then the more modern ones but the internal battery system does not work (well) . External 24 V charger is better. Ulrich, N1UL In a message dated 7/18/2015 10:25:58

Re: [time-nuts] 5 x 2 x 3 = 30 MHz

done anything with them. Regards Paul WB8TSL On Thu, Jul 16, 2015 at 6:02 PM, KA2WEU--- via time-nuts time-nuts@febo.com wrote: I am working with this .. amazing device, Ulrich N1UL ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] how to find low noise transistors

Good afternoon, There is a problem in the literature that people confuse the spot noise figure and the large signal noise properties. Here AF and KF needs to be known and considered. Here is the mathematical correct formula in a Word for Windows Form attached file. If you use it for

Re: [time-nuts] how to find low noise transistors

BFG540 In a message dated 7/18/2015 6:37:34 P.M. Eastern Daylight Time, j...@miles.io writes: Last time buy 31-Dec-15. :( Have you heard of any good substitutes? I've built a lot of amps with BFG591s, and they also got the axe recently. Small-signal RF bipolars seem to be an

Re: [time-nuts] how to find low noise transistors

Good afternoon, another low noise recommended transistor is the http://www.cel.com/pdf/datasheets/ne856m02.pdf and for frequencies below 10 Mhz the 2N2857. This nice fact is that the AF and KF values are published, the bad part is the the AF=1 value violates the law of physics.

Re: [time-nuts] how to find low noise transistors

] 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

Re: [time-nuts] how to find low noise transistors

, 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

Re: [time-nuts] how to find low noise transistors

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

Re: [time-nuts] how to find low noise transistors

...@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-schwarz.com Subject: Re: [time-nuts] how to find low noise transistors BFG540 That's what I mean -- both BFG540

Re: [time-nuts] 5 x 2 x 3 = 30 MHz

On 07/18/2015 11:52 AM, KA2WEU--- via time-nuts wrote: Good morning, the AT Cut is inherently noisier then the SC cut but the SC has some spurious resonances modes. Measurements below 1 Hz are very tricky as the oscillator must be (more or less) insulated from hum, infrared (heater

Re: [time-nuts] 5 x 2 x 3 = 30 MHz

older crystals that are nice but have never done anything with them. Regards Paul WB8TSL On Thu, Jul 16, 2015 at 6:02 PM, KA2WEU--- via time-nuts time-nuts@febo.com wrote: I am working with this .. amazing device, Ulrich N1UL

Re: [time-nuts] Wikipedia and Residual Phase Noise

This is a misnomer, it should be called additivephase noise. Think of a noise free oscillator with a buffer stage. This stage because of AM/PM conversion under large signal condition adds noise, makes the over all system noisier.. Ulrich Rohde In a message dated 7/13/2015 8:31:19

Re: [time-nuts] Low noise quartz crystal oscillator by Bruce Griffiths

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

Re: [time-nuts] Low noise quartz crystal oscillator by Bruce Griffiths

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

Re: [time-nuts] Low noise quartz crystal oscillator by Bruce Griffiths

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

Re: [time-nuts] Downsizing dilemma, HP 3335A

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.

Re: [time-nuts] Downsizing dilemma, HP 3335A

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

Re: [time-nuts] Stanford Research 725

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

[time-nuts] For all : Makes for interesting reading

_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

Re: [time-nuts] Phase Noise Comparisons

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

Re: [time-nuts] Phase Noise Comparisons

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

[time-nuts] http://www.arrl.org/news/ieee-microwave-theory-and-techniques-society-honors-ulr

http://www.microwavejournal.com/articles/25845-dr-ulrich-l-rohde-receives-20 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

Re: [time-nuts] Best Rubidium Frequency Standard

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

Re: [time-nuts] PLL book 3rd edition

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>

Re: [time-nuts] PLL book 3rd edition

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,

Re: [time-nuts] PLL book 3rd edition

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

Re: [time-nuts] PLL book 3rd edition and other activities

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

Re: [time-nuts] PLL book 3rd edition

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

Re: [time-nuts] Fw: 5065

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

[time-nuts] HP 5065A

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

Re: [time-nuts] Framework for simulation of oscillators

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

Re: [time-nuts] Framework for simulation of oscillators

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 >

Re: [time-nuts] Framework for simulation of oscillators

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

Re: [time-nuts] Framework for simulation of oscillators

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

Re: [time-nuts] PLL book 3rd edition

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 > >

Re: [time-nuts] PLL book 3rd edition

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 >

Re: [time-nuts] PLL book 3rd edition

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

Re: [time-nuts] PLL book 3rd edition

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

[time-nuts] AM-FM noise

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 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Rpair of an 8662 HP Generator

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,

Re: [time-nuts] Misc topics

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

Re: [time-nuts] Rpair of an 8662 HP 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

Re: [time-nuts] Rpair of an 8662 HP Generator

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

[time-nuts] Rpair of an 8662 HP Generator

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 ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] IFCS 2016 in New Orleans

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.

Re: [time-nuts] Effect of EFC noise on phase noise

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.

Re: [time-nuts] State of the art of crystal oscillator measurements

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

Re: [time-nuts] State of the art of crystal oscillator measurements

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

Re: [time-nuts] State of the art of crystal oscillator measurements

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

Re: [time-nuts] State of the art of crystal oscillator measurements

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).

Re: [time-nuts] State of the art of crystal oscillator measurements

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-- &

Re: [time-nuts] State of the art of crystal oscillator measurements

-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

[time-nuts] State of the art of crystal oscillator measurements

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

Re: [time-nuts] Oscillator Phase Noise: A 50-Year Review

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

Re: [time-nuts] Oscillator Phase Noise: A 50-Year Review

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

Re: [time-nuts] Oscillator Phase Noise: A 50-Year Review

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

Re: [time-nuts] Oscillator Phase Noise: A 50-Year Review

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

Re: [time-nuts] Oscillator Phase Noise: A 50-Year Review

, 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

Re: [time-nuts] Oscillator Phase Noise: A 50-Year Review

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

Re: [time-nuts] Oscillator Phase Noise: A 50-Year Review

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

Re: [time-nuts] Oscillator Phase Noise: A 50-Year Review

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

Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

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

Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

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

Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

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

Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

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

Re: [time-nuts] Phase noise testing

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 --

Re: [time-nuts] TimeLab

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

Re: [time-nuts] GPSDO - probably a stupid question.

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

Re: [time-nuts] Rare HP clock

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

Re: [time-nuts] Rare HP clock

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

Re: [time-nuts] our favorite topics

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://

[time-nuts] our favorite topics

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 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] our favorite topics

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

Re: [time-nuts] our favorite topics

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,

Re: [time-nuts] our favorite topics

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

Re: [time-nuts] our favorite topics

http://read.pudn.com/downloads84/sourcecode/comm/322249/pll_matlab[1]/pll_ma tlab/pll2/colpitts.pdf ___ 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

Re: [time-nuts] our favorite topics

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"_

Re: [time-nuts] Rohde & Schwarz XSD 2.5 MHz crystal gone bad?

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,

Re: [time-nuts] our favorite topics

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

Re: [time-nuts] our favorite topics

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

Re: [time-nuts] our favorite topics

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

Re: [time-nuts] our favorite topics

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

Re: [time-nuts] our favorite topics

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)

Re: [time-nuts] Switching regulator 12 > 4 V (3.3)

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 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Switching regulator 12 > 4 V (3.3)

...@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

Re: [time-nuts] Syntesizer Book Update

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

Re: [time-nuts] Looking for OSA 3210 information

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

Re: [time-nuts] PLL book 3rd edition

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:

Re: [time-nuts] Cross-correlatiion workshop at EFTF-IFCS-2017

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) ;

Re: [time-nuts] Cross-correlatiion workshop at EFTF-IFCS-2017

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

Re: [time-nuts] Ph.D. and Postdoc Positions at Max-Planck Institute for Infor...

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

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