Re: [time-nuts] One sure way to kill your FE-5680A or FE-5650A

Sounds similar to the issues you encounter with Atmel and some other EEPROM/Flash based MCUs when they're not held in reset until VCC becomes stable. http://atmel.force.com/support/articles/en_US/FAQ/Prevent-EEPROM-corruption Some more info:

Re: [time-nuts] One sure way to kill your FE-5680A or FE-5650A

It would seem so bit I don't remember seeing a 'reset' chip in the 5680. I'm wondering if there's scope to add one onto the rail that runs the PSD and 80C320 to keep it in reset. On 9 Jun 2016 13:00, "Bob Camp" wrote: > Hi > > Based on the number of different ways there seem to

[time-nuts] Elektor GPSDO

Just throwing this into the lion's den. https://www.elektormagazine.com/labs/gps-assisted-10-mhz-frequency-reference ___ 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] RS232 / GPS interface/prototyping board

Life is so much easier now, dirtypcb is a great service, I have a pile of boards here from them which are far greater quality than anything I could hope to produce at home or even in the lab I used to have. They're also better quality than any of the local board houses I used in the past.

Re: [time-nuts] Tait reference

Thank you Nigel, I've also taken a gamble on one of these units and am keeping my fingers crossed that it has a Rb standard in it. The service manual is most interesting, it looks like I could use one of the two 'loops' to lock a different OCXO, with a little tinkering it could be a very useful

Re: [time-nuts] Working with SMT parts.

I'll throw Designs Park into the mix, it's a free program from RS components and I *think* it generates gerber files. I've used it for a couple of boards and got a grasp of it on a quiet afternoon. On 13 Aug 2016 16:05, "William H. Fite" wrote: > For me, the ideal solution

Re: [time-nuts] GPS for Nixie Clock

I've used the wiznet module, these days I'd consider the esp8266, powerful little module that can be had for a couple of dollars complete with WiFi capabilities and enough GPIO to interface GPS and some sort of serial nixie interface. On 12 Jul 2016 20:11, "Vlad" wrote: > > In

Re: [time-nuts] Visiting Greenwich

There is also the RSGB exhibition station at Bletchley which has some nice radio principles demos On 5 Jul 2016 08:45, "Attila Kinali" wrote: > On Mon, 4 Jul 2016 19:01:45 -0700 > Bob wrote: > > > but also to Bletchley Park (just a short train ride outside

Re: [time-nuts] Visiting Greenwich

They also have TIM the speaking clock which has a rack mounted atomic standard. On 5 Jul 2016 21:01, "John Dalziel - crashposition" wrote: > I would also recommend the Worshipful Company of Clockmakers collection at > the Science Museum. It’s a great collection and they

Re: [time-nuts] Visiting Greenwich

)) > > Alan > G3NYK > > - Original Message - From: "Clint Jay" <cjaysh...@gmail.com> > To: "Discussion of precise time and frequency measurement" < > time-nuts@febo.com> > Sent: Tuesday, July 05, 2016 9:13 PM > Subject: Re: [t

Re: [time-nuts] Good GPSDO on eBay?

No, my experience with Chinese sellers, even when you file a "not as described" case, is that eBay will require you to return the item at your own expense if the seller has stated they will not pay return shipping. Ebay's attitude was that the seller could just state in their item description

Re: [time-nuts] Speaking clock

Tomtom had custom voice capability for sat nav years ago, seems to have disappeared now but I can, from personal experience, confirm how quickly John Cleese giving 'funny' directions becomes annoying. On 8 Aug 2016 16:02, "Artek Manuals" wrote: > On 8/8/2016 7:28 AM,

Re: [time-nuts] Safely getting the electrical length of a connected antenna feedline

I doubt it's worth mentioning that a random SMD footprint cut from a larger board and some of the currently available eBay SMD adapter boards may have plated through holes which could short if used to prototype on copper clad board so it's worth paying a little attention to insulating the

Re: [time-nuts] Cable length calibration

Some of the cheap gigabit network cards can and with surprising accuracy On 29 Jun 2016 22:02, "Gary E. Miller" wrote: > Yo Hal! > > On Wed, 29 Jun 2016 12:28:50 -0700 > Hal Murray wrote: > > > bro...@pacific.net said: > > > At one point they were

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

Interested to know if anyone has done this with a ublox receiver, I spotted the option in some of the technical documents and went as far as finding a stockist for the external DAC I think it'd need. On 17 Aug 2016 22:02, "Mark Sims" wrote: > The Ublox modules (at least

Re: [time-nuts] Anybody want a Thunderbolt power supply?

Ah, these are the LM723 based linear supplies, Lambda Coutant made variants as did Farnell, they're renowned as high reliability, low noise supplies. There are schematics out there for the variants but they're all extremely similar if not identical. I think I may even have a couple of

Re: [time-nuts] Need Time Help

What's being transmitted? If it's a repetitive message would it be possible to inhibit transmission using an external time source, perhaps a PIC or even a Pi inhibiting the "PTT", leaving the windows box in control of what's transmitted or do the Windows boxes have to communicate with each other

Re: [time-nuts] I love the smell of tantalum in the morning

Heating one end and adding a little solder to the joint will allow you to lift the cap, the leads are folded over tabs so they'll bend nicely and allow the cap to lift, once you've got one end lifted, heat the other and it will come away easily. Clean up the pads with solder wick then you're

Re: [time-nuts] Man with too many clocks.

I own a 5680b and while it only outputs a PPS signal there is a very stable 30MHz signal available inside the unit IIRC. I can dig mine out and find the signal if that's of use? I believe they can be modded for 10MHz output on the 15p D type but I've just not managed to find time to get around

Re: [time-nuts] I love the smell of tantalum in the morning

Definitely, for a proven bad or dirt cheap leaded part when the board is valuable cut the legs. gives you an added advantage when removing the part as well as you can apply heat to both sides of the leg if it's through hole. On 5 November 2016 at 21:56, Mark Sims wrote: >

Re: [time-nuts] Nutty time-nuttery with WWVB

I thought the same at first, but then I thought a little more, it may not be time nut standards of accuracy but... It's possible to buy ESP8266 modules for a couple of pounds, they will run NTP, if you want to go up market then a Pi Zero. Hooked up to a cheap DS1307 module or one of the higher

Re: [time-nuts] Nutty time-nuttery with WWVB

I should also have added, it may be better to work out a repeater scheme where an externally mounted antenna re-radiates the received signal inside your home. On 10 Nov 2016 12:21, "Peter Reilley" wrote: > I have a few of those "atomic" clocks that receive WWVB to set

Re: [time-nuts] Nutty time-nuttery with WWVB

Yes, there are projects that will generate the relevant signals but you have to be absolutely certain that the signal will not 'leak' and affect clocks you don't own. Which may not be as easy as it sounds, it's amazing just how far a couple of milli watts of RF can travel. On 10 Nov 2016

Re: [time-nuts] Nutty time-nuttery with WWVB

Found it. There was an article by Andy Flind in a UK electronics magazine, EPE December 2001 which detailed an MSF repeater to overcome a problem with 60KHz time signal reception. Shouldnt be bothered by the signal format as I remember it being a very simple design. As others have pointed out,

Re: [time-nuts] Nutty time-nuttery with WWVB

Don't forget power line networking equipment but just because one interference source is tolerated or in order by the authorities doesn't mean it's ok to create another. Those switchers and even the hardware they power (I'm thinking of satellite receivers which spew all sorts of hash over HF

Re: [time-nuts] Atomic Watch

I am peeking in as a mere amateur and that article hurts my brain, I cannot imagine how hard some folk here must be battering their heads against their desks. Oh, and it's not the first either, this one was a year prior...

Re: [time-nuts] Vintage Quartz Crystal Manufacturing

Might be worth popping over to the GQRP mailing list and asking, there are a few enthusiasts there but wireless set no. 7 makes it sound like they were from a military radio. On 26 Nov 2016 13:00, "Adrian Godwin" wrote: > I bought some old crystals on ebay : > >

[time-nuts] Time, NTD, IoT and bug fixes

Given recent discussions of IoT, NTP and wall clocks, this may be of interest http://www.theregister.co.uk/2016/11/23/ntp_patch_time_rolls_around_again/ And the vulnerabilities: http://www.kb.cert.org/vuls/id/633847 -- Clint. *No trees were harmed in the sending of this mail. However, a

Re: [time-nuts] So what’s inside that Cs Beam Tube anyway?

There's a sectioned Cs tube at the science museum in London, sadly I can't see the pics you link to but I'd be interested to see if they're the same as that exhibit (I think I have a picture somewhere) On 31 Oct 2016 20:54, "Skip Withrow" wrote: > Hello Time-Nuts, > > >

Re: [time-nuts] Cs tube pics

While I've no need for such accuracy in my little home workshop, I *really* would like a Cs standard, just because. The Rb and GPSDO are more than adequate for my needs but I can understand (and, for now, manage to resist) the addiction to accuracy and find it fascinating that such results can

Re: [time-nuts] Prologix USB-GPIB Controller

I think those voltage reference ICs have been done to death over on EEVBlog and the general consensus is that they work very well, the only counterfeit part is the 'calibration' sheet that comes with them, they seem to be done on a photocopier. They also appear to exceed the accuracy

Re: [time-nuts] Totally unrelated, but..

I was looking for a low noise regulator to power a log amp/detector earlier this year and was rather surprised to find the 78xx regulators were considerably better than many of the "low noise" devices. But!! I've also had odd experiences with some brands of 78xx devices (and way before the 'net

Re: [time-nuts] Totally unrelated, but..

(Rick) Karlquist" <rich...@karlquist.com> wrote: > On 12/7/2016 12:16 PM, Clint Jay wrote: > >> I was looking for a low noise regulator to power a log amp/detector >> earlier >> this year and was rather surprised to find the 78xx regulators were >> considerab

Re: [time-nuts] FE-5650A option 58 tuning word for 10 MHz output

Yes, in the 5650 there's only DDS on opt 58, in the 5680 there is one in the main loop too, my bad for not being precise/muddled. On 10 Jan 2017 01:43, "wb6bnq" wrote: > HI Bob & Clint, > > If you look at the second message of this thread, I attached the manual > that applies

Re: [time-nuts] RPi/ beagle bone-like computer without video

Raspberry Pi compute module? Maybe even a Pi Zero? On 30 Nov 2016 21:47, "Adrian Godwin" wrote: > The tiny g3 routers are worth looking at. They have WiFi, Ethernet and USB, > cost very little and will usually run wrt54g Linux. Can be rather short on > memory though. > > On

Re: [time-nuts] FE-5650A option 58 tuning word for 10 MHz output

Option 58 in a FE Rb is an additional sub board which has nothing to do with the physics package control loop. In an option 58 Rb there are two DDS chips. On 9 January 2017 at 17:48, Scott Stobbe wrote: > It very well could be. Based on Marks comments, it sounds

Re: [time-nuts] FE-5650A option 58 tuning word for 10 MHz output

at they > may be using an FPGA programmed as a divider to provide the output > frequency. > > BillWB6BNQ > > > Clint Jay wrote: > > Yes, in the 5650 there's only DDS on opt 58, in the 5680 there is one in >> the main loop too, my bad for not being precise/muddled. &g

Re: [time-nuts] Car Clock drift - the lowly 32kHz tuning fork crystal specs

The clocks in my car have been set by the RDS data, DAB data or GPS in the last five or six I've had. Drift is a thing of the past as long as i listen to digital radio or the BBC on analogue FM, if i listen to neither then the clock drifts a couple of seconds a month but it syncs right up withing

Re: [time-nuts] Ships fooled in GPS spoofing attack suggest Russian cyberweapon

It might have been a hoax but I'm sure I saw it demonstrated by a couple of students who used it to fool Pokémon go... On 14 Aug 2017 8:27 am, "Martin Burnicki" <martin.burni...@burnicki.net> wrote: > Clint Jay wrote: > > Didn't someone demonstrate this using some

Re: [time-nuts] Ships fooled in GPS spoofing attack suggest Russian cyberweapon

No, this was not the software hack, it was done with some rather nice Rohde test equipment. On 14 Aug 2017 10:42 am, "Martin Burnicki" <martin.burni...@burnicki.net> wrote: > Clint Jay wrote: > > Absolutely, their use of it was for something trivial and my reason f

Re: [time-nuts] Ships fooled in GPS spoofing attack suggest Russian cyberweapon

available to anyone who has the funds. On 14 Aug 2017 10:04 am, "Martin Burnicki" <martin.burni...@burnicki.net> wrote: > Clint Jay wrote: > > It might have been a hoax but I'm sure I saw it demonstrated by a couple > of > > students who used it to fool Pokémon go

Re: [time-nuts] Ships fooled in GPS spoofing attack suggest Russian cyberweapon

Didn't someone demonstrate this using some rather expensive but 'off the shelf' Rohde & Schwarz lab gear a year or so ago? On 12 August 2017 at 22:23, John Allen wrote: > FYI, John K1AE > > -Original Message- > From: YCCC

Re: [time-nuts] Ships fooled in GPS spoofing attack suggest Russian cyberweapon

...@burnicki.net> wrote: > Clint Jay wrote: > > No, this was not the software hack, it was done with some rather nice > > Rohde test equipment. > > Ah, OK, of course that's also possible. > > However, what I found was much simpler: > https://devs-lab.com/how-to

Re: [time-nuts] Ships fooled in GPS spoofing attack suggest Russian cyberweapon

I guess it would depend on the level of infrastructure available to the attacker, clock distribution is a reasonably well solved problem isn't it? There would, I suppose also be the issue of receiver swamping, you could monitor received signal levels as it's my understanding that the signals from

Re: [time-nuts] Ships fooled in GPS spoofing attack suggest Russian cyberweapon

wrote: > On Mon, 14 Aug 2017 10:26:13 +0100 > Clint Jay <cjaysh...@gmail.com> wrote: > > > That it can "so easily" be spoofed (it's not a trivial hack to spoof and > > would, as far as I can see, take good knowledge of how GPS works and > skill &g

Re: [time-nuts] GPS Units in Z3801A

Well that's handy to know, I've got a box of those I picked up from a hamfest. I'll have to dig them out and test them On 12 Jul 2017 2:55 pm, "Pete Lancashire" wrote: > I may have more of replacement Motorola GPS receiver modules. I had been > sorting out stuff in

Re: [time-nuts] Time-nut going England!

Greenwich as recommended by others is a must, the science museum is also a good way to spend a day. Cheap and London don't necessarily go hand in hand unpess you go d hostel style accommodation or perhaps even youth hostels? I can recommend the New Linden hotel near Notting hill gate from recent

Re: [time-nuts] Time-nut going England!

Yes, Bletchley is a good day out but be aware the national museum of computing is a separate entity and has its own entry fee. On 27 Apr 2017 12:00 pm, "Dave B via time-nuts" wrote: > On 26/04/17 17:00, time-nuts-requ...@febo.com wrote: > > > Message: 12 > > Date: Wed, 26

Re: [time-nuts] Surplus Lucent RFTG-m-II units in rack shelf

Congratulations, I was mulling over buying it, even just for resale if the Rb standard worked its worth way more than the asking price, looking forward to seeing the results of testing. On 12 May 2017 9:18 am, "Iain Young" wrote: > On 12/05/17 07:23, Gregory Beat wrote: > > As

Re: [time-nuts] HP5090A Off Air Standard Receiver

If it's just locking to the carrier I wonder if it'd be possible to use a suitably modified PICDiv clocked from a 'standard' 10MHz GPS locked device like the Lucent? On 19 June 2017 at 14:19, GandalfG8--- via time-nuts wrote: > I suppose a converter from 198KHz could be an

Re: [time-nuts] Halcyon OFS

ineered. At least for the signal and > > locking chain. If a micro is involved then things get fuzzy fast. Anyhow > > good luck with you digging in. > > Regards > > Paul > > WB8TSL > > > > On Mon, Jun 19, 2017 at 8:27 AM, Clint Jay <cjaysh...@gmail.com>

Re: [time-nuts] CRT for Tracor 527A

A little extra heater voltage and allowing the tube to 'cook' a while can help as can a CRT rejuvenator but the cathode is usually tiny on a mono tube and from experience with television repairs back in the dawn of my career, they very rarely last any length of time after rejuvenation before

Re: [time-nuts] Anderson PowerPole (was Charles Wenzel GPSDO)

al > application. They are used to connect pads to Automatic External > Defibrillators. In that application, the two poles (15A, red & white) are > glued together rather than using the roll pin. > > Bob > > > On Jun 22, 2017, at 08:29, Clint Jay <cjaysh...@gmail.co

Re: [time-nuts] Anderson PowerPole (was Charles Wenzel GPSDO)

It is possible to get hold of locking barrel connectors, they insert as normal and a quarter twist fastens them in place. The plugs and sockets are compatible with non locking equivalents too. Of course they're not great for applications that need a decent amount of current and other

Re: [time-nuts] Halcyon OFS

on about an experimental modification to > increase the robustness and usefulness of the OFS-1 here: > http://dabbledoo.weebly.com/halcyon-ofs-1.html > > Best regards > Ole > > > > Den 19-06-2017 kl. 17:15 skrev Clint Jay: > >> Mine is somewhat different to that mode

Re: [time-nuts] Anderson PowerPole (was Charles Wenzel GPSDO)

Ooh, I forgot the Neutrik range, haven't used those for years. Excellent quality and not horrifically expensive On 22 Jun 2017 3:11 pm, "Clay Autery" wrote: > OK I was wrong... Attila was right. IF we are going to talk > alternatives and not simply bash PP cons, then

Re: [time-nuts] Poor man's oven

There's a few 'OCXO' designs out there, I'm not qualified to comment on the timenutty quality of them but someone else mentioned Hans Summers offerings and I would offer Roman Black's simple design (if it's not been mentioned already): http://www.romanblack.com/xoven.htm I've no idea if it's

[time-nuts] Halcyon OFS

I have been given a Halcyon Electronics OFS1 standard which seems to work, it's a version that has 198KHz and 162KHz selector on the fron and after a reasonable period of time it displays 'lock' and gives a nicely stable 1,10 and 10 MHz output on the front panel BNCs, (I know, it should be 1,5 and

Re: [time-nuts] Halcyon OFS

. > > > On 19/06/2017 10:17, Clint Jay wrote: > > I have been given a Halcyon Electronics OFS1 standard which seems to > work, > > it's a version that has 198KHz and 162KHz selector on the fron and after > a > > reasonable period of time it displays 'lock'

Re: [time-nuts] R XSRM Rubidium Standard

Experience has shown me that you can reasonably purchase good, working test equipment that's well within calibration tolerances if you are buying the more 'common' equipment, 6.5 digit meters, frequency counters, even a Stanford SR620... I've been very lucky with those, two spectrum analysers and

Re: [time-nuts] R XSRM Rubidium Standard

I do enjoy the 'chase' of repairing things other people have discarded as beyond economic repair, my CMU200 came with a rather amusing fault as well as a good example of poor industrial design choice, it's now a very useful piece of equipment. I often scrounge faulty electronic equipment just

Re: [time-nuts] Symmetricom S200 PSU

Hi Chris, if it's not blowing fuses and you're sure you've got all the capacitors ( low value ones in the primary specifically) then check all the high value resistors on the primary and continuity from reservoir capacitor to switching transistor. The average SMPSU usually doesn't deviate wildly

Re: [time-nuts] R XSRM Rubidium Standard

Yes. An instrument with a calibration certificate is not necessarily accurate but it's inaccuracies are known and can be compensated for (but only to the accuracy of the calibration reference of course.) On 17 Sep 2017 17:39, "Magnus Danielson" wrote: > Hi, > >

Re: [time-nuts] OCXO Vectron 218Y44442

I was thinking the same as Azelio, I had a Racal 04B OCXO which refused to start until I reseated the crystal in the socket. After that, well, it's in almost daily use as a reference in a 1992 counter and has never stopped since. On 17 Oct 2017 07:18, "Azelio Boriani"

Re: [time-nuts] Very large X9.2 solar flare.

It's been interesting watching the various web SDRs the afternoon and seeing the HF bands go silent. They were recovering a short while ago but I will keep a corner of my eye on them for the rest of the day On 7 Sep 2017 5:57 pm, "jimlux" wrote: > On 9/7/17 8:35 AM, David

Re: [time-nuts] S200 PS

It's a very standard supply, RS do them for instance: http://uk.rs-online.com/web/p/embedded-switch-mode-power-supplies-smps/4557639/ There are plenty of uncased ones for a lot less if you're willing to do some metal bashing. On 4 October 2017 at 22:20, Lists via time-nuts

Re: [time-nuts] Simple open source microcontroller solution to tune DDS needed

Seconded on the Andy Talbot suggestion, iirc he has almost exactly what you need On 14 Dec 2017 17:19, "Dave B via time-nuts" wrote: > Take a look at Andy Talbot's page at... > > http://www.g4jnt.com/Synthesizers.htm > > Lots of good options there for that sort of thing. > >

Re: [time-nuts] Simple open source microcontroller solution to tune DDS needed

I think maybe you might have meant the AD9835 ? Anyway, there are plenty of code examples out there, do you have a processor in mind or are you free to use whatever is suggested? On 13 Dec 2017 20:03, "Richard (Rick) Karlquist" wrote: > I need a very simple controller

Re: [time-nuts] GPS Timing Antenna Failure - Long

I'm all for anything that encourages whisky growth On Sun, 13 May 2018 12:16 pm Dana Whitlow, wrote: > Flux can provide just the right kind of ionic leakage path that leads to > whisky growth > and eventual sudden shorts. > > Dana > > > On Sun, May 13, 2018 at 12:23 AM,

Re: [time-nuts] Motorola GPS Antenna?

Is it worth buying for that money if it is? On Mon, 21 May 2018 5:13 pm Dan Rae, <dan...@verizon.net> wrote: > On 5/21/2018 8:24 AM, Clint Jay wrote: > > Found on eBay with no further information, can anyone identify? > > > > > https://www.ebay.co.uk/itm/EX-MOD-Moto

[time-nuts] Motorola GPS Antenna?

Found on eBay with no further information, can anyone identify? https://www.ebay.co.uk/itm/EX-MOD-Motorola-Antenna/323177970249?hash=item4b3ee87a49:g:tHIAAOSwUCZavUAe -- Clint. M0UAW IO83 *No trees were harmed in the sending of this mail. However, a large number of electrons were greatly

Re: [time-nuts] GNS-500A Rubidium

fratom. I would not count on > it working without some significant effort. The price is right though. > > Bob > > > On May 25, 2018, at 10:21 AM, Clint Jay <cjaysh...@gmail.com> wrote: > > > > Just spotted on eBay, a rather sorry looking GNS-500A Rubidium standard, &

[time-nuts] GNS-500A Rubidium

Just spotted on eBay, a rather sorry looking GNS-500A Rubidium standard, it's not expensive and is up for best offer, May or may not be of use to someone? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions

Interested to know how much noise would be from USB signalling and how much is " machine noise" from the PC as my understanding of USB signalling is that it's differential so such should be low noise? I'm also not sure I've ever seen a non screened usb cable? On Fri, 18 May 2018 1:17 pm Dana

Re: [time-nuts] Sayrosa 607B Frequency Synthesiser

SayRosa may be long gone but a lot of their IP went over to Wayne Kerr and some is still produced to this day, the 257 automatic modulation meter is one I think. On Sun, 10 Jun 2018 at 20:31, gandalfg8--- via time-nuts wrote: > Perhaps not a very common item, and probably restricted to the UK,

[time-nuts] Microsemi up for sale?

Perhaps of interest to the list https://www.theregister.co.uk/2018/01/25/microsemi/ -- Clint. *No trees were harmed in the sending of this mail. However, a large number of electrons were greatly inconvenienced.* ___ time-nuts mailing list --

Re: [time-nuts] eBay GPS antenna test.

Sounds like a drop shipping operation, they've found a supplier in China who is willing to send goods either in plain wrapping without any supplier name or the name of the agent who's selling it. It can be useful to Google anything that looks like a part number on the packaging, you'll often find

Re: [time-nuts] eBay GPS antenna test.

Maybe posting > pictures of the label? That way those (not I) who can read Chinese might > spot something that allows a search to proceed. > > Bob > > > On Feb 13, 2018, at 11:06 AM, Clint Jay <cjaysh...@gmail.com> wrote: > > > > Sounds like a drop shipping

Re: [time-nuts] eBay GPS antenna test.

" <kb...@n1k.org> wrote: > Hi > > That can be a bit harder if the labels are all in Chinese. Maybe posting > pictures of the label? That way those (not I) who can read Chinese might > spot something that allows a search to proceed. > > Bob > > > On Feb 13, 201

Re: [time-nuts] Curious, how many t-nuts have 5065A

It looks rough, there's a cesium standard for sale in the UK, time nuts member perhaps, that's sat at a quarter of the price, I know which I'd buy. On 24 Feb 2018 10:46, "George Atkinson via time-nuts" wrote: > There is one on UK ebay at the moment but its not being given

Re: [time-nuts] Teardown of Chinese made eBay GPS antenna.

Then Africa. On 22 Feb 2018 22:42, "Bob kb8tq" wrote: > India > > > On Feb 22, 2018, at 5:37 PM, Van Horn, David backcountryaccess.com> wrote: > > > > > > "Some of you are to young to remember when Javanese products were > considered junk same storyBert Kehren"

Re: [time-nuts] TymServe TS2100 dead power supply

If it's not restarted after a power down and there's no 'ticking' sound from it then it's likely to be a problem with the bootstrap supply, switchers will run for years once they're running but while they're running the small capacitor (of the order of 47uF) and the resistor that feeds it (often

Re: [time-nuts] Dual GPSDO - any advantage?

Ahh, I've found the listing, has anyone received one? I hate to say this but I'm highly sceptical that they will ever turn up, looks and smells very much like the standard eBay scam to me. On 10 April 2018 at 14:52, Bob kb8tq wrote: > Hi > > Simple answer is that the

Re: [time-nuts] Dual GPSDO - any advantage?

Sad to say I think I was right, the listings have been pulled already and the seller now has zero items for sale. Get those paypal refund cases logged. On 10 April 2018 at 15:13, gandalfg8--- via time-nuts wrote: > > > > Is this auction # 273145006434, actually showing at

Re: [time-nuts] 4046 replacement

Why not try one, the 74HC4046 is pin compatible I think, you may need to make some changes to use the '7046 version but you can then make a value judgement if the flaw had in fact mainfested itself as a problem in your design? On 18 April 2018 at 09:04, donald collie

Re: [time-nuts] HP 53131A display dim

This may sound silly but aside from the failing capacitors that cause displays to dim, the emissions falling and other esoteric issues, in my years repairing VCRs with VFDs I most often found a good clean of the glass and bezel would improve the brightness a considerable amount. On 9 Nov 2015

Re: [time-nuts] UBLOX LEA-5T Programming?

I'd second that, sounds interesting and plenty of accuracy for the project I'm thinking of. On 10 Oct 2015 15:00, "Alex Pummer" wrote: > Hi Bert, > where could I get more inf on on that project? > 73 > KJ6UHN > Alex > > On 10/10/2015 4:23 AM, Bert Kehren via time-nuts wrote: >

Re: [time-nuts] UBLOX LEA-5T Programming?

I am still learning and want to understand, if the PPS is good then why is the programmable output bad, as I understand it thus far, the PPS is derived from the same clock source or have I got that badly wrong? On 9 October 2015 at 12:16, Bob Camp wrote: > Hi > > Doing a GPSDO by

Re: [time-nuts] FE-5680B Rubidium and DDS

ing on your monitor point) by at least 0.15 > ppm. The sweep is > > slow enough that a counter running at a 0.1 second gate will easily show > you what’s going on. > > > > Of course it can be other things. All of them are a bit more involved to > fix. > > > > Bob

Re: [time-nuts] FE-5680B Rubidium and DDS

The 10MHz output comes from the XC9572 CPLD but the fact that it's there for a few seconds makes me thing it's possible to recover it, by fair means or foul. It's possible it's just a gate, certainly looks like it's bing switched off and there's a file which claims to be a dump of the CPLD (as

Re: [time-nuts] FE-5680B Rubidium and DDS

The 9851 will work with pretty much any clock and give an output but of course you need a decent speed clock to get a useful range of frequencies. The handy feature of the 9851 is that it has a clock multiplier built in so that 30MHz can clock it at its maximum speed and give a useful DC-60MHz

Re: [time-nuts] FE-5680B Rubidium and DDS

Bryan, I think we do, bought from an eBay seller named Fluke.I? I also found that schematic but it's a partial, very useful nonetheless. There's also a dump of the firmware and CPLD so I'm hoping I can make some sense of that to work out the CPLD, I'd be happy with a solid 10MHz output but to my

Re: [time-nuts] FE-5680B Rubidium and DDS

I've made some investigations and re-confirmed my earlier findings on the FE-5680B I have. It locks from cold in under five minutes and runs at approximately 700mA steady with the expected PPS signal on the output connector when locked. The particular 5680 I have has a Hi Density 15p male

Re: [time-nuts] FE-5680B Rubidium and DDS

. On 30 September 2015 at 15:32, cfo <xne...@luna.dyndns.dk> wrote: > On Sat, 26 Sep 2015 07:36:30 +0100, Clint Jay wrote: > > *** SNIP > > so it may be > > possible to modify the B version Bryan and I have. > *** SNIP > > Someone just publish

Re: [time-nuts] SMD TADD-1 distribution amplifier - seeking comments and suggestions?

I once spent a very miserable but profitable weekend remaking a thin ethernet network where the "installation expert" had stripped back 10B2 coax four inches and neatly separated core and shield, heatshrinked them into pigtails and then soldered them into panel mount BNC sockets. He was outraged

Re: [time-nuts] Tait reference

That's a very happy coincidence and one I'd hoped to hear. The pictures in the auction seem to show a lack of tarnish on the Ref Out and Ref In BNCs which suggests they have had plugs on them, looping the internal reference, other little bits of information also pointed to that, the remnants of a

[time-nuts] Aeroflex IFR 3413

I've acquired from eBay a 'faulty' Aeroflex IFR 3413 signal generator with Option 001 (no attenuator) and an error 509 which I think would indicate it's had power applied to the output port. Does anyone have service information for these generators? I'm also looking for firmware upgrades and any

Re: [time-nuts] Calibration procedures - what is normal?

I have to say, I'm hugely impressed by the Aeroflex 3413 I've bought and Cobham's customer service response has so far been excellent but I suspect it will be far too expensive for me to buy repair parts which is a shame. On 13 Feb 2016 09:14, "Dave Brown" wrote: > Cobham

Re: [time-nuts] HP5370B & HP5345B Front-End IC Redesign Effort

I would imagine it was much less expensive for HP to gut second hand equipment and re-qualify it than restart a fab or qualify a new design front end. On 25 Jan 2016 16:01, "Bert Kehren via time-nuts" wrote: > Getting back to the original question, years ago I was told but

Re: [time-nuts] PRS10 C900 replacement

Do tantalum then benefit from being 'reformed' in a similar fashion to wet electrolytics? Do they recover from moisture ingress by baking in a similar fashion to SMD chips that have been stored incorrectly? On 20 Jan 2016 14:10, "Bob Camp" wrote: > Hi > > > The only thing I

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