[time-nuts] Austron 2000C, anyone?

Anyone has an Austron 2000C for sale? Need one for an experiment. Please offlist to ik1odo@gmail-com 73 - Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and

Re: [time-nuts] New GPSDO on EBAY From China

The OCXO is a Morion (Russia) MV89A. You may download a datasheet from http://www.morion.com.ru/catalog_pdf/MV89-OCXO.pdf Looks decent, stability vs. temperature and aging are as usual. BG7TBL is a Chinese radioamateur, quite known for his designs. 73 - Marco IK1ODO

Re: [time-nuts] Italian Time Station on 10 MHz ?

For what I know they have an experimental license by the Telecom authority, and operate from Tuscany near Viareggio since two or three years. The license has been given on the basis that there are no more HF time and frequency signals operating in Europe. When I knew about it I offered to

Re: [time-nuts] OT: eBay Contact Congress

At 18:14 22-04-13, you wrote: I did trace the headers back via SpamCop before posting. The originating ISP looked sort of eBayish, sort of not eBayish... inconclusive... hence the question. -John Ebay emails always start with your nickname. True ebay administrative (billing) emails ALWAYS

Re: [time-nuts] OT - DC-10 gyros

A good solution to generate 400 Hz (for European amateurs at least) may be this: http://www.helmut-singer.de/stock/1814769336.html Plus three amplifier stages, of course. I am interested in gyros too. Have a sealed Whittaker displacement gyro (marked as Western Electric GS-19719) and a Western

[time-nuts] Racal 9420 OCXO schematic?

The subject says it all: anyone has the schematic of the Racal 9420 OCXO? A friend has one that stopped oscillating, and want to give it a try. 73 - Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] OT: Question on dead HP34401

At 21:40 11/12/2012, you wrote: Two comments the manuals available on agilent What on earth is a crossguard? Data exchange between a floating, guarded circuit and a ground referenced one? Marco IK1ODO ___ time-nuts mailing list --

[time-nuts] Oscillator coupling

Very nice experiment on oscillator coupling: http://blogs.discovermagazine.com/cosmicvariance/2012/10/01/you-are-getting-sleeepy/ Quite time-nuts style, I would say. Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe,

Re: [time-nuts] An interesting freq counter

At 02:46 01-05-12, you wrote: that is awesome! with Transistorized Binary Unit and up to 1.1 megacycles. wow! Hand made, one by one, on Veroboard... sigh... Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Neutrinos not so fast? (defectove connector)

At 01:35 23-02-12, you wrote: I read that the news came from sources familiar with the experiment. Is there any official press release? Or only rumors? Antonio I8IOV Antonio, vedi Battiston su Le Scienze

Re: [time-nuts] Neutrinos not so fast? (defectove connector)

sorry for previous message in Italian, had to be a personal one :-) Marco IK1ODO ___ 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.

Re: [time-nuts] How best to exchange Large files?

At 04:07 21-02-12, you wrote: Recording high speed and/or long general purpose raw Osc data, the file can become very large. I'm looking for a simple, fast and easy (and cheap) way to transfer large compressed data files of up to say a 100 MB between time-nuts. I know there are all kinds

Re: [time-nuts] Literature on low noise and HF electronics

Another suggestion if you are interested in analogic design is Sergio Franco, Design with Operational Amplifiers and Analog Integrated Circuits, McGraw Hill, 1988 (and other newer editions). Common on ebay and amazon. Chapter 14 (noise in operational amplifiers) has been very useful to me.

Re: [time-nuts] New Rubidium Frequency Standard Group

No new groups please, the Rb thread is interesting for time-nuts, and I don't see the need. 73 - Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

Re: [time-nuts] Ebay FE-5680A Rb: Are they that good?

Javier, the plots are nice, and I did the same years ago for an Efratom FRS-C. Found about the same data. The only point is that with the spectrum analyzer you see the S/A pahse noise, not the Rb, wich has to be orders of magnitude lower. About the comments on the waveform and harmonics

Re: [time-nuts] Ebay FE-5680A Rb: Are they that good?

At 14:21 09-12-11, you wrote: Marco Think you are correct for most things we do. However in communications for mixing and such a sine wave is desirable and a very clean output to minimize things like IMD and other products as we get the 10 MC to its final frequency. Since you are a ham you may

Re: [time-nuts] Ebay FE-5680A Rb: Are they that good?

At 18:23 09-12-11, Javier wrote: I think that the low-band preselector (I don't remember the model) was more oriented to increase the dynamic range for EMC testing, rather than due to a crappy harmonic response of the analyzer. It also includes a preamplifier. Correct. 85685A, a very

Re: [time-nuts] Those pesky Neutrinos again...

At 08:16 21-11-11, you wrote: I heard on the BBC the other day that a repeat experiment is planned, firing neurinos from the US into Canada. The labs were not cited, but I expect it would be Fermilab to Sudbury Ontario. If this is the case, then there will still be the problem of not being

[time-nuts] 10k year clock

You all there probably already know, but ... very interesting, IMHO. http://spectrum.ieee.org/geek-life/profiles/engineering-the-10-000year-clock/0 73 - Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] What's dBic on GPS antenna gain figures?

At 15:13 03-11-11, you wrote: So its just 'dB' relative to a circular polarised isotropic radiator - never knew that before! Correct. It is the standard way to declare the gain of a circularly polarized antenna when receiving or transmitting circularly polarized waves, as dBi is valid only

Re: [time-nuts] the care and feeding of LPRO's

Eric, the power supply quality is not critical. The LPRO (like most other Rb's) has an internal switching power supply, so the wide tolerance in the primary power source voltage. I found other Rb's to be quite sensitive to vibrations, but when they are in a box, with a decent PS (I use an

Re: [time-nuts] OT: UK - NOTIFICATION OF GPS JAMMING EXERCISES

At 16:25 06-10-11, you wrote: So they are deploying LightSquared? :) Possibly testing for impact of ... ? Mala tempora currunt ! 73 - Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] GPS Interference Question

At 15:44 30-09-11, Jason wrote: To filter out the L2 signal, would an actual GPS receiver have to be replaced / modified? Or would a more simple and cheaper alternative be to get a new antenna (with fancy filtering) to replace my existing roof-top antenna and expect all my old equipment to

Re: [time-nuts] Happy 10th birthday, time-nuts

Tom, many thanks to you and John for starting and supporting this list. It is one of the best I know, with a very good S/N, and a lot of competent people. Honestly, I have no idea on how to improve it :-) - IMHO it is perfect as is. Marco IK1ODO

Re: [time-nuts] Any thoughts on best rubidium?

At 15:55 26-09-11, you wrote: Hello, It is here: http://www.testequipmentplus.com/LCD85662H.html Regards, Javier But, as others pointed out in hp_agilent_equipment group, the replacement LCD lacks the resolution of the original vector-graphic CRT. Marco IK1ODO

[time-nuts] Best Cs in the world ?

Kurt Gibble, at Penn State, made major contributions to the field of primary frequency standards by developing models for the systematic effects within caesium fountain clocks, Szymaniec said. The uncertainties of those effects, now reduced several fold with the new models and numerical

Re: [time-nuts] Anyone know what this counter is?

I agree, it is very probably a Systron Donner 6053, 3 GHz, nixie. Specs and (bad) pictures scanned from the manual on my server in http://www.spinelectronics.eu/ftp/SD6053.pdf I bet it comes from some remains of John's Radio stock - I remember seeing many of them there, 15 years ago. 73 -

[time-nuts] Dallas NV-SRAM replacement? (in 3458A)

Speaking of the 3458A, it has three DS1235Y-150 non volatile SRAM on the CPU board. Each is a 32K x 8 bit, so there is a lot of info inside. As the useful life of those is in the order of 10 years and most 3458A a re now 10 to 20 year old, is there a possible replacement? Possibly with a more

Re: [time-nuts] Test - RYRYRY

At 08:32 01-06-10, you wrote: was that 45.45 or 50 Baud? Robert G8RPI. But it was not Baudot, by sure... :-) ZHC? ZRO? VVV DE IK1ODO TESTING ... ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] HP 104AR

Hi all, just got a very nice HP 104AR (1963 vintage) for my collection. It seems to work, but... anyone has a manual in PDF, ot at least a schematic ? 73 - Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] HP 104AR

Hello Ulrich, of course the 103AR would be nice to have. My email should get it, but I agree that it would be better to send it to Didier's site. As you prefer... I'm QRV. About the messages to Rick four years ago, I found no replies. Does Rick still have the manuals? Rare things sitting on

Re: [time-nuts] HP 104AR

At 18:33 19-04-10, you wrote: The 103AR manual is available for download at the to-way.com Web site under test Equipment Manuals--HP Had K7MLR Thanks! Just downloaded. Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To

Re: [time-nuts] One of the strangest clocks I have ever heard...

At 04.49 26/10/2009, you wrote: One of the strangest clocks I have ever heard... http://www.music.columbia.edu/~douglas/portfolio/sineclock/ . ciao _ Elio. Oh, well... :-| interesting! :-\ Marco IK1ODO ___ time-nuts mailing list

[time-nuts] 58540A, anyone ?

Hi all, anyone here has an HP 54540A for sale? Answers to ik1...@spin-it.com 73 - Marco IK1ODO ___ 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

[time-nuts] RS XSD-2 - help needed

Hello, I got a broken RohdeSchwarz XSD-2 crystal oscillator module, type 283.6010.02 . By first, has anyone a schematic for it? Then, the dewar flask originally containing the oscillator mass is broken. Size was (approx) 65 mm internal diameter, 150 mm internal height. Who has similar dewars?

[time-nuts] 10 MHz over optical fiber?

Hi all, I have to carry a 10 MHz standard frequency signal inside an EMC screened room via fiber optic cable. Not willing to re-invent the wheel, do something like an optical standard frequency link exist on the market? I think it is possible to use standard 100MB LAN transceivers, and POF.

Re: [time-nuts] 10 MHz over optical fiber?

At 16.41 24/11/2008, you wrote: Why fibre optic? You'll only need to convert back to copper when you get it in there (unless the kit that needs the 10Mhz reference has optical 10MHz in), and if you do that you may as well just take it in there using high quality coax (say RG-400U) and a bulkhead

Re: [time-nuts] 10 MHz over optical fiber?

Thanks to all for the quick answers and all the info. As usual, time-nuts is a great resource :-) Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

Re: [time-nuts] Using GPS for space-based instrument

At 09.37 11/11/2008, you wrote: Both Symmetricom and Frequency Electronics provide specialist space qualified products. It's not just a case of ruggedisation, but radiation hardening, g sensitivity which need to be designed in. Rob Kimberley Also, space qualified GPS must handle the larger

Re: [time-nuts] Naive question on WWW stations

At 23.55 25/09/2008, you wrote: Hi Antonio, Ah yes I presume this is it ... Many thanks pf Yes, it is - WWV in Europe is usually quite weak, RWM is a strong signal. You will find the schedules and frequencies of all Russian time and frequency signals (including RWM and RID, Currently off the

Re: [time-nuts] Re Frequency divider design critique request

At 05.10 11/07/2008, Bill wrote: What have you done with Life using modern computers? Er... not so modern, but... I wrote a Life program in Z80 assembler to exercise the emulator on an HP 64000A development system... it was in 1981 :-) Life was ideated by J.H. Conway in 1970. See

Re: [time-nuts] WIRED Time Nuts

At 08.20 11/12/2007, you wrote: Hi John Rick, Looks like Quinn's WIRED magazine time-nuts article was just released... Very nice article. A lot of mad guys out there :-) ! 73 - Marco IK1ODO / AI4YF ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] Austron 2000C on EBay

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Don, What is the frequency source in this unit? Regards... Don None. It could discipline an external oscillator (a 1250A, I presume). Have two of them on the shelf, anyone in EU interested to play with? They were working

Re: [time-nuts] E1938s

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY At 04.17 28/08/2007, you wrote: Just got mine and Marco Bruno's E1938s in today's mail. Marco: it'll go out tomorrow, unless you'd like to wait until I can run an ADEV plot on them both. Let me know. No hurry, I'm leaving

Re: [time-nuts] 5 MHz from 10 MHz

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] At 14.01 23/07/2007, you wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] No point using an expensive divider with an 8640B. The close-in noise is dominated by the cavity, especially at the bandwidths used by

Re: [time-nuts] Ebay 5071A scam back again?

At 14.06 26/06/2007, Poul wrote: Never buy anything from a userid that has zero feedback. ... and, in particular, if he registered to ebay just the same day! 73 - Marco IK1ODO / AI4YF ___ time-nuts mailing list time-nuts@febo.com