Re: [time-nuts] Tbolt temperature sensor
In a message dated 05/02/2009 18:44:44 GMT Standard Time, hol...@hotmail.com writes: The whole purpose of a GPSDO with an expensive double oven OCXO is to provide extremely high quality holdover performance when GPS signals go away. To achieve this level of performance one needs to compensate for the affects of temperature on the parts of the system outside the oven. 0.5C resolution is not up to the task of maintaining parts per trillion accuracy.There does not appear to be any other temperature sensor in the Tbolt --- I'm still not convinced. There's going to be another very important temperature sensor inside the Thunderbolt and that's the one inside the ovens, perhaps even two in a double oven. I understand where you're coming from but, given the apparent lack of evidence to support the sudden deterioration in performance your findings would suggest, does it not seem more likely that in fact this sensor is not involved in the conditioning process? regards Nigel GM8PZR ___ 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] Tbolt temperature sensor
In a message dated 05/02/2009 06:25:52 GMT Standard Time, hol...@hotmail.com writes: Actually, what is apparently going on with the newer Thunderbolts is worse than that. The reported temperature seems to only end in 0.25C or 0.75C, so it has an effective 0.5C resolution. The basic DS1620 resolution is 9 bits, but the Tbolt firmware reduces that to 8 bits since the first step in the high res temp algorithm is to mask off the lower bit. Whatever is going on they are not getting the extra resolution that they think they are, and in fact they are reducing the basic resolution of the chip. The firmware does seem do do some filtering on those values since whenever the reading steps you can see some smoothing going on. A lot of times the temperature value oscillatates around the step point. The filter apparently does not have any hysteresis. The older Thunderbolts produced a nice smooth curve. The high res temperature reading (Bruce says is 12 bit/0.0625C) coupled with the firmware filtering gave temperature curves with microdegree scale resolution. The newer ones clunk around with effectively 0.5C resolution. But have you actually established this has anything whatsoever to do with the oscillator conditioning and, if not, what effects are you suggesting it has on the conditioned output? Isn't it likely that a temperature sensor adjacent to the RS232 connector is just going to monitor unit temperature for environmental purposes, perhaps, for example, to give the option for flagging up an overheating situation, in which case surely 0.5C resolution is more than adequate and the "clunkiness" isn't really an issue? I agree it's always nice to know what's happening, and why, but I suspect the performance of this sensor has no relevance to the oscillator performance itself. regards Nigel GM8PZR regards Nigel GM8PZR ___ 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] Tbolt with Palisade?
In a message dated 20/01/2009 09:32:45 GMT Standard Time, gr...@ghengineering.co.uk writes: Guess I'll have to start a search for an HP58532A, VIC-100, Vaisala or similar. I don't think a cheapy £4 patch antenna will give the same performance. - Hi Grant I think this really does depend on where you are, satellites in view etc, and what level of performance you're actually looking for. I have a few different timing antennas but have found these don't give very reliable reception indoors. Until I can get these mounted outdoors I have been having good results on various receivers using some small Trimble magnetic patch antennas, specified 26dB gain, attached to a steel plate and sitting on a shelf inside a one level timber framed house on the west coast of Scotland. These came via a buy it now from the usual place at $21 for 10 about a year ago. Driving a pair of Thunderbolts with these and comparing them with an HP 53132A counter, either one as reference and the other as input, once locked I see variations of just a few places around zero in the 10th decimal place. I have used this test on any two units selected from four with consistent results. Not a very scientific test perhaps, and nothing else measured, but as regards frequency at least I don't think they're suffering too much from their "lesser" antennas:-) regards Nigel GM8PZR ___ 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] Enrico Rubiola's new book
In a message dated 09/01/2009 21:09:51 GMT Standard Time, jmi...@pop.net writes: Phase Noise and Frequency Stability in Oscillators: http://www.amazon.com/gp/product/0521886775/ --- Thanks John for the information, that looks like a very worthwhile investment.. Apologies if what follows is common knowledge but, whilst performing a Google search on the current title, I discovered that this supersedes a 2005 draft version, "The Leeson effect - Phase noise in quasilinear oscillators", copies of which are freely, and legally:-), available online. One link to that is... _http://arxiv.org/abs/physics/0502143_ (http://arxiv.org/abs/physics/0502143) Another interesting link, and where I found the reference to the earlier work, offers some supplementary material to the current book in the form of seminar texts _http://www.femto-st.fr/~rubiola/indexx-oscillator-noise.html_ (http://www.femto-st.fr/~rubiola/indexx-oscillator-noise.html) regards Nigel GM8PZR ___ 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] Connector source for LPRO Rb oscillator...??
In a message dated 01/01/2009 15:20:12 GMT Standard Time, did...@cox.net writes: As a crimping tool, I use a small vise I have normally secured to my bench. That works very well. I have used it for about 15 years and made hundreds of cables for that type of connector, up to and including the 40 pin type used for hard drives (the old parallel ATA type). It is too bad that while the 10 pin connector is very common in older PCs to connect the serial ports from the mothercard to the rear panel, in that application they only crimp 9 wires (because there is a 9 pin serial connector at the other end), and the LPRO needs both wires at the end, so while you may reuse the connector itself (they are not too hard to take apart, even though you need to be careful if you intend to reuse the connector), you need to make a new cable. -- I agree re the vise, having done the same myself, but in this instance why not just cut off part of an old floppy or hard drive cable, enough to leave the 10 sockets and attached wiring? For personal use it's not so important to have a locating lug, and smaller connectors quite often didn't have them anyway. regards Nigel GM8PZR ___ 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] Trimble multi-way socket
In a message dated 22/12/2008 13:58:07 GMT Standard Time, dave.g0...@tiscali.co.uk writes: I have one of the circular Trimbel units, I think it might be a Jupiter? Anyway, what I'm after is one of the multi-way plugs so that I can connect it up and start to use it. Does anyone know of a source for these plugs please? --- Hi Dave Take a look here for connector info and a manual for the Palisade unit, plus other interesting info _http://www.dc2light.pwp.blueyonder.co.uk/Webpage/GPS_ref.htm_ (http://www.dc2light.pwp.blueyonder.co.uk/Webpage/GPS_ref.htm) regards Nigel GM8PZR ___ 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] PTS160 GPIB
In a message dated 15/12/2008 21:05:16 GMT Standard Time, gandal...@aol.com writes: If you check out the PTS manuals I uploaded to Didier's site I'm sure one of those has the GPIB section, if not let me know and I should be able to scan it from one of my other manuals. My original PTS160 manual doesn't include the GPIB section but I'm pretty sure thay'll all be similar. The Manuals or PTS catalogue should give the option numbers in each case for comparison anyway. Hi again Had I've just checked what I uploaded, and the PTS310 manual has a GPIB section in it. I've also got a separate scan of the GPIB section from my PTS250 manual and that has different module/PCB numbers and might be closer to what's in the PTS 160 but, as I said before, I don't recall there being very much difference. I can't remember without checking what the the module references are for the PTS 160 but will email you the separate section anyway. regards Nigel GM8PZR ___ 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] PTS160 GPIB
In a message dated 15/12/2008 18:44:04 GMT Standard Time, h...@to-way.com writes: Looking for a copy of the GPIB section of a PTS Synthesizer manual, preferably a 160, if it makes a difference. My manual only has the standard PTS remote information. Hi Had If you check out the PTS manuals I uploaded to Didier's site I'm sure one of those has the GPIB section, if not let me know and I should be able to scan it from one of my other manuals. My original PTS160 manual doesn't include the GPIB section but I'm pretty sure thay'll all be similar. The Manuals or PTS catalogue should give the option numbers in each case for comparison anyway. Regards Nigel GM8PZR ___ 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] Oncore question
In a message dated 24/11/2008 05:43:49 GMT Standard Time, [EMAIL PROTECTED] writes: I simply put large rechargeable Lithium-Vanadium pentoxide coin cell with appropriate charging circuit to GPS carrier board and forgot about this question... Another solution is to put CR123 battery holder to carrier PCB, stuff it with a good quality cell and it will probably last for 15+ years, driving just clock and CMOS RAM during power outages.. And if it's important that the whole system stays working for reasonable length drop outs, lead acid gel batteries on a master 12, 24 or 48 volt (nominal) power supply, again forgetting batteries at board level, are still hard to beat. regards Nigel GM8PZR ___ 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] I'm back! And I need a receiver...
In a message dated 20/11/2008 17:16:18 GMT Standard Time, [EMAIL PROTECTED] writes: What I'd be looking for is a rackmounted unit, no more than 4U high, that can put out disciplined 10MHz and IRIG-B time code. A Trak Systems 882x series would be nice, but I know how popular those are. - I thought that too but make sure you're getting what you expect. At the end of last month I bought a Trak 8821B-7 via the usual place, others here may well have bid on it too, it didn't have the display but I'd already got an IRIG-B display unit so no problem there, or so I thought. It turned out to be a base station special, with an original Trak fitted 16.384MHz oscillator and with the IRIG-B and divided frequency outputs not fitted. Bit of an expensive mistake that one:-( Sorry to hear the 5000 module didn't survive too long. regards Nigel GM8PZR ___ 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] thunderbolt with +-15V?
In a message dated 05/11/2008 18:22:53 GMT Standard Time, [EMAIL PROTECTED] writes: Page 3-4 of version 5 of the Thunderbolt manual, available online as "ThunderBoltBook2002.pdf", has the supply voltage specification.. Whoops That should read..."ThunderBoltBook2003.pdf" Sorry ___ 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] thunderbolt with +-15V?
In a message dated 05/11/2008 18:11:11 GMT Standard Time, [EMAIL PROTECTED] writes: Do someone know if the thunderbolt supports operating with +-15V instead of +-12V? I looked at the voltage tolerance but could´t find any hints. Page 3-4 of version 5 of the Thunderbolt manual, available online as "ThunderBoltBook2002.pdf", has the supply voltage specification.. +12v +/-10% max current 750 mA +5v +/-5% max current 400 mA -12v +/-10% max current 10 mA Ripple +5v 50 mV peak-to-peak, 15 mVrms +/-12v 75 mV peak-to-peak, 20 mVrms Regards Nigel GM8PZR ___ 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] firmware bug ???
In a message dated 29/10/2008 00:05:34 GMT Standard Time, [EMAIL PROTECTED] writes: Was not giving up on the GPSDO just trying to fix the bad link, my fat fingers make it about as easy as surface mount PCBs LOL I never have any problems with surface mount PCBs... just the components that go on them:-) ___ 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] firmware bug ???
In a message dated 28/10/2008 23:31:38 GMT Standard Time, [EMAIL PROTECTED] writes: My last try, if the link doesn't work then maybe I should give up !!! Don't give up too soon. I just sent you a copy of the 8820A manual:-) regards Nigel GM8PZR ___ 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] OT: connector identification
In a message dated 23/10/2008 01:07:43 GMT Daylight Time, [EMAIL PROTECTED] writes: There IS a mini-TNC as I recall. My ancient (80s vintage) cellphone had such a thing on the antenna. There's also something referred to as a mini-UHF (presumably a small PL-259), but the amphenol catalog pitures show the serrated top of the female, and yours are smooth. The thread was 3/8" -24 threads/inch --- Yup, mini UHF is just that, and there's a mini BNC too, even a mini version of the original Belling-Lee TV coax connector, so mini-TNC might not be quite such a strange beast after all:-) regards Nigel GM8PZR ___ 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] OT: connector identification
In a message dated 22/10/2008 22:26:45 GMT Daylight Time, [EMAIL PROTECTED] writes: I have a coax connector that I would like to identify. Se attached picture. To the left is a female TNC for reference. The unknown male is attached to the cable. Unknown female to the upper left as part of a "T" adapter. It looks kind of a smaller version of TNC. It is slighly larger than SMA. Female diameter is 5/16", whereas TNC is 7/16" and SMA is 4/16" - according to my simple measurement. Anyone recognizing this connector? Hi Bjorn Quick answer is no, but "miniature TNC" would seem to be a possible contender. Unfortunately, although I've seen enough references to miniature TNCs to know they exist, I've not yet found a photo or drawing. I'm pretty sure I have some equipment with them fitted but, if I have, it will be in storage so not something to be confirmed in a hurry. What you've got, as you say, is certainly not SMB or SMC but is about the same size as SM. And yes, that is SM and not SMA. The SM connector, not very common but I've got some Greenpar SM adapters, is similar to SMA, in terms of pin and dielectric arrangement, but bigger, whilst what you have is a very close match to the TNC configuration, but smaller. so, in size at least, they sort of meet in the middle:-) A while ago I bought a Greenpar adapter kit that was a special for the UK military and probably the biggest kit Greenpar made. Alongside most, if not all, the common connectors we're all used to was quite a range I'd never heard of before, including SM, HN, SC, Pattern 8, Pattern 12, etc etc. They generally seem to be a "close but not quite" match to more common connectors but so far I've not seen any of them in commercial catalogues. I suspect your connectors might be similarly unusual but still think Mini TNC is the most likely option. although happy to accept that somebody will probably prove me wrong within a few minutse of this being posted:-) regards Nigel GM8PZR ___ 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] BC637PCI
In a message dated 11/10/2008 05:12:11 GMT Daylight Time, [EMAIL PROTECTED] writes: Has anyone "upgraded" the oscillator on an older Datum BC637PCI card to the MTI crystal? Is it as simple as changing the crystal and adjusting the osc gain? - PS Should have added to my previous waffle, I think the answer to this is yes:-) given the need to reset any changed values every time you power down and up again. regards Nigel GM8PZR ** ___ 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] BC637PCI
In a message dated 11/10/2008 05:12:11 GMT Daylight Time, [EMAIL PROTECTED] writes: Has anyone "upgraded" the oscillator on an older Datum BC637PCI card to the MTI crystal? Is it as simple as changing the crystal and adjusting the osc gain? - Hi Scott I've not changed the oscillator, but I did look into the possibility and also ran a BC637PCI for a while with an external Vectron ovened 10MHz oscillator. I assume you have the BC637PCI manual? Appendix A refers to field upgrades, both converting a 635 to 637 by adding the GPS module and upgrading to the ovened oscillator. In both instances a firmware "upgrade" was activated by entering a device specific password provided by Datum/Symmetricom. I doubt that option is still longer available even though the necessary firmware changes are obviously already there waiting to be activated. I suspect, in the case of the oscillator upgrade anyway, some default settings including oscillator gain will be all that's changed. When running with an external oscillator I found that loss of power would default any settings I had changed so no doubt that's what would happen if you upgraded the oscillator without the firmware change. Page 6-15, in the rev K manual anyway, gives details of the oscillator gain adjustment, I found approx 70 seemed reasonable with my Vectron oscillator but my BC637PCI, and perhaps others, has some conditioning issues anyway. The basic onboard oscillator was not very good, apologies for such an imprecise statement but I can't find the fairly extensive notes made several months ago, both accuracy and stability were relatively poor measured on an HP53132A using a known good Thunderbolt as a reference. In particular I noticed quite frequent, but seemingly random, jumps in output frequency that would then take a little while to recover, a bit like a fast acting automatic gain control with slow recovery time. These jumps were significantly greater than the "normal" variations I observed and fell outside of the unit specification. Using the Vectron oscillator greatly improved things, it was a much better oscillator anyway and I was able to observe the significant improvement in the Vectron performance when being conditioned by the BC637PCI. However, the frequency jumps still occured albeit with overall performance much improved and frequency stability much better and the jumps less than before, ie frequency jumps were seemingly reduced in proportion to the better accuracy. Without the jumps I would have been happy with the Vectron performance but didn't feel able to trust the combination without permanent computer monitoring, and still don't know if this was a function of my BC637PCI or something common to all of them. It was interesting to play with, and I'll probably go back to it at some time, but I was more concerned then to set up something I could rely on and eventually put it to one side. Whilst working with the BC637PCI I did find that I needed both the BC635PCI and BC637PCI software, both offer options the other lacks, and I have late copies of both if you need them. I also have two manuals, version H from Datum that includes schematics, and the fairly similar version K from Symmetricom but without schematics. regards Nigel GM8PZR ** ___ 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] Help with HP 8640B generator
In a message dated 05/09/2008 23:23:37 GMT Daylight Time, [EMAIL PROTECTED] writes: Trivia: The engineer who designed that chip for HP 35 years ago has the cubicle next to me at Agilent Labs! It was considered very advanced at the time. -- The cubicle? - Think of it as many nested boxes, within the building there is a room, within the room there is a cubicle, within the cubicle there is a piece of test equipment, within the test equipment there is a oven enclosure, within the oven enclosure there is a box, within the box there is an oscillator, within the oscillator there is a crystal housing, within the crystal housing there is a chunk o' rock, upon which everything rests... --- OK I get it The cubicle was advanced for it's time because it was sitting on a chunk of rock. I like that, it's really good especially when one considers how the Dilbert principle has demonstrated the very great difficulty involved in finding a stable cubicle. ___ 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] Help with HP 8640B generator
In a message dated 05/09/2008 05:23:56 GMT Daylight Time, [EMAIL PROTECTED] writes: Trivia: The engineer who designed that chip for HP 35 years ago has the cubicle next to me at Agilent Labs! It was considered very advanced at the time. -- The cubicle? ___ 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] Austron 1250B
In a message dated 30/08/2008 22:53:17 GMT Daylight Time, [EMAIL PROTECTED] writes: I am playing with an Austron 1250B and I'd like to add a fine frequency adjust. The data sheet I have on the 1150 oscillator inside indicates that the EFC input is an option. Anyone have a schematic for the 1250B that shows how the 1150 is wired in. If no EFC on this unit I'll be getting rid of it. Hi Corby I haven't got any specific information on the 1250B but did upload the manual for the 1250 to Didier's site some time ago and it's in his GPS manuals section. As far as I know both the 1250 and 1250A came with front panel fine tuning, which uses the EFC input on the oscillator, as standard. It's shown fitted in the 1250 manual and fitted to both my 1250As. I have seen photos of the 1250B without the fine frequency pot but would suspect the 1150 would be the same in all models. The 1250 manual shows little information for the 1150 itself but the overall wiring diagram shows the fine control pot being wired to pin 8 on the 1150, as well as some other connections between the 1150 and the PSU. regards Nigel GM8PZR ___ 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] PTS160 Manual
Hi All I uploaded the manual for the Programmed Test Sources PTS160 Frequency Synthesiser to Didier's site earlier today, so it should be available for download soon. Regards Nigel GM8PZR ___ 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] PTS Meter
In a message dated 28/08/2008 18:12:45 GMT Daylight Time, [EMAIL PROTECTED] writes: Just picked up a PTS-160 that seems to be working fine except for the front panel meter. Appears to have either an open coil or a open connection at a pivot point. No DC continuity through the meter. Anybody have a dead synthesizer that might entertain a deal on the meter? -- Hi Had Sorry I can't help with the meter, even if I had one a dead PTS160 would still be much too nice to break up:-) I did look in the manual, hoping to find a meter spec for you in case something else would fit, but it seems to be one of those odd parts that isn't listed with the PCB components but not with the panel components either. I'm sure a little experimentation could find something suitable but even when working the meter isn't very precise so you could probably do just as well by marking around the level control. That's what's done on most, if not all, versions of the Wavetek 5120A which is their equivalent of the PTS160. Did you get a manual with your PTS160? regards Nigel GM8PZR ___ 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] I want a good micro-controller
In a message dated 16/08/2008 01:11:09 GMT Daylight Time, [EMAIL PROTECTED] writes: The PIC... I have no nice words for the PIC. It's a CPU architecture kept alive by Donald Rumsfeld himself (He was the CEO of G.I. back in the '70's), and surely he must have made a deal with the Devil to make it as successful as it is. How's that for a religious argument? :-) - LOL Keeping it secular, what's with the PIC bashing? Surely it's a case of horses for courses, and there's been enough successful commercial, as well as hobby, products based on PICs to suggest you might be just a wee bit out of touch with some parts of the real world:-) regards Nigel GM8PZR ___ 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] The name "Totally Accurate Clock"
In a message dated 06/08/2008 00:15:08 GMT Daylight Time, [EMAIL PROTECTED] writes: Also used to do stuff like measure the winds on Titan and Venus I did that once, but it's a pig of a job and was glad to get back!! ___ 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] Anti-Static conductive foam warning
Apologies to those who might see this on more than one group or list and apologies again if it's old news to everyone but me, but I did think it important enough to share. I've just retrieved a pair of ICs that have been dry stored as spares in a component storage rack since 1979, a long time I know but probably not unusual for those of us using and maintaining older equipment. These, as I thought anyway, were correctly stored with the pins pressed into black anti-static foam, the usual stuff that's been used for this purpose for years. Unfortunately the foam has broken down into a sticky crumble and the plating on the IC pins is quite badly corroded, probably to the point where they won't take solder. A metal canned crystal lying against the foam has also corroded at the pont of contact. I've seen this stuff turn into a gooey mess inside some instrument cases but hadn't previously even thought about the same thing happening where it's used used for component storage. I've checked other trays and whilst not too many used this stuff but where they did there's evidence of similar problems. I've even got a later large component rack, all ok so far but for how long?, where it was fitted from new to every drawer:-( That's all, just offered as a word of warning to anyone else with components similarly stored. regards Nigel GM8PZR ___ 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] Thunderbolt SV and AMU Signal levels
In a message dated 23/07/2008 17:31:28 GMT Daylight Time, [EMAIL PROTECTED] writes: I've had the Thunderbolt and the counter running for over 24 hours now, and the 5th decimal figure, for a 1 second gate time, seems to have settled down a bit. Now, that could be the counter , or the thunderbolt, or both. Who can tell? :-) --- Well, you better just hope it's the counter, if it's the Thunderbolt you really do have a problem:-) regards Nigel GM8PZR ___ 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] Thunderbolt SV and AMU Signal levels
In a message dated 23/07/2008 00:42:47 GMT Daylight Time, [EMAIL PROTECTED] writes: It turned out that the basic reference as fitted to the 3132A was fine to demonstrate that the counter was working, but that was it. -- Please excuse late night brain misfunction. 3132A should read 53132A regards Nigel GM8PZR ___ 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] Thunderbolt SV and AMU Signal levels
In a message dated 23/07/2008 00:15:51 GMT Daylight Time, [EMAIL PROTECTED] writes: The 10MHz output seems, as far as my old Multifunction Counter is concerned, to be to 10.0MHz within +/-0.1 MHz. The display showing 10.3 to 10.4 MHz all evening. So, my guess is that my poor old counter is +/- 10Hz out, but that may be due to the age and non-calibration of my frequency counter over the years. Or... The Thunderbolt 10MHz output is moving up and down by 0.1 MHz within a 10MHz band. This is where I start to get to grips with the spectrum analyser that a friend of mine lent to me. I hope... - Hi Dave One of the problems with becoming a time-nut is that the first step, whatever that might be, is fatal. And after that it just gets worse:-) Unless your Thunderbolt is very unwell, which I doubt, it won't be moving anywhere near that much. Not only is the reference in your counter likley to be off frequency but it's also likely that the stability of the reference is much worse than what you're trying to measure, and this is where the downward spiral really begins. Earlier this year I bought an HP 53132A counter to give me the resolution I'd decided I needed and promptly used it to measure the 10MHz output of a Thunderbolt. The result was similar to what you're seeing and a great disappointment, especially as I didn't know at first whether to trust the counter or the Thunderbolt. However, using another Thunderbolt to drive the external reference input on the counter gave a very different result, and immediately any variation became just a few figures in the 10th decimal place. It turned out that the basic reference as fitted to the 3132A was fine to demonstrate that the counter was working, but that was it. If your counter will accept an external reference I'd suggest using the Thunderbolt for that and just trusting the results. However, if the figures you've shown represent the resolution limit of your counter then you may want to consider a counter with better resolution, still using the Thunderbolt as a reference of course, but just watch your balance as the downward slide continues:-) regards Nigel GM8PZR ___ 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] Rack flange kit for 5370B and 3325B
In a message dated 21/07/2008 12:22:23 GMT Daylight Time, [EMAIL PROTECTED] writes: If there is anyone with a source or another idea of how to accomplish rack mounting without the HP ears, I would like to hear about it also. - Make your own from aluminium stock angle, or use a rack shelf. regards Nigel GM8PZR ___ 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] Thunderbolt vs Z3801A
In a message dated 20/07/2008 23:33:28 GMT Daylight Time, [EMAIL PROTECTED] writes: Somebody had to pose this question... given the respective sizes of the Trimble Thunderbolt and the HP Z3801A, the simplicity of the first and the complexity of the second, it comes natural to ask ourselves, what advantages does the HP unit have to justify the differences ? Is the Z3801A really so better than the TB, or simply did Trimble do a much better design ? -- Hi Alberto Somebody did, no prizes for guessing who, and here's the results:-).. _http://www.leapsecond.com/pages/gpsdo/_ (http://www.leapsecond.com/pages/gpsdo/) regards Nigel GM8PZR ___ 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] Trimble Palisade
In a message dated 14/07/2008 21:09:41 GMT Daylight Time, [EMAIL PROTECTED] writes: Does anyone have any useful information on using it, or should I open it up and replace the multiway socket and see if I can do something else other than mount it outside as another time standard? Thanks for any ideas. - I don't know if you've seen this site? _http://www.dc2light.pwp.blueyonder.co.uk/Webpage/GPS_ref.htm_ (http://www.dc2light.pwp.blueyonder.co.uk/Webpage/GPS_ref.htm) I wouldn't recommend taking it apart if you do intend to put it outside. If you can't find the proper connector it shouldn't be difficult to mount individual sockets plus some sleeves on the ends of a multiway cable, although not exactly weatherproof either. It used to be possible to buy D type shells and pins/sockets separately, just as one example, but perhaps a conventional D type connector could be broken apart to provide the sockets? regards Nigel GM8PZR ___ 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] Thunderbolt - temperature
In a message dated 12/07/2008 01:01:27 GMT Daylight Time, [EMAIL PROTECTED] writes: You can see a picture of the "red box" unit in the Thunderbolt data sheet: _http://trl.trimble.com/docushare/dsweb/Get/Document-10015/_ (http://trl.trimble.com/docushare/dsweb/Get/Document-10015/) --- Oh, OK, I understand now, but guess we have different ideas of what a "red box" might be. regards Nigel GM8PZR ___ 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] Thunderbolt - temperature
In a message dated 12/07/2008 00:14:13 GMT Daylight Time, [EMAIL PROTECTED] writes: when my unit in the red metal box was open, it was around 32C -- I'm intrigued by this and similar earlier references. I've only seen Thunderbolts in gold coloured aluminium boxes, where did the red boxed version come from? regards Nigel GM8PZR ___ 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] Monitor for Thunderbolt and other GPS receivers
In a message dated 11/07/2008 21:48:44 GMT Daylight Time, [EMAIL PROTECTED] writes: If there is enough interest, it would not be very hard or expensive to make a small PWB for the processor (the DIP version would be easier to solder), the voltage regulators, the pot (to adjust screen contrast), a push button (to select among a couple or more of screen content) and the RS-232 translator. -- Hi Didier I would certainly be interested, and could also make use of three. regards Nigel GM8PZR ___ 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] Austron 1250A manual archive?
In a message dated 07/07/2008 00:12:18 GMT Daylight Time, [EMAIL PROTECTED] writes: OK Forget my request as it is already in work. Thanks Nigel I will refer any future requests to Didier's site Bill K7NOM -- Hi Bill I'm having some "fun" uploading it right now but have just realised anyway that mine is a 1250 manual, not 1250A. I'm not sure what the differences are but it might still be well worth while you getting yours scanned, I'd certainly be interested in a copy. regards Nigel GM8PZR ___ 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] Austron 1250A manual archive?
In a message dated 06/07/2008 22:26:29 GMT Daylight Time, [EMAIL PROTECTED] writes: I have a manual for the Austron 1250A and have answered a couple of questions as to the schematics. I would like to loan my manual to some one that can scan it and make it available on the "NET" Anyone want that chore. I would want the manual returned after it was scanned. Hi Bill, and All I have a scanned copy of the 1250A manual and will be uploading it to Didier's site shortly. regards Nigel GM8PZR ___ 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] HP 113BR manual scanned
In a message dated 05/07/2008 05:51:17 GMT Daylight Time, [EMAIL PROTECTED] writes: I'll also ask if Agilent has an "official" "front-door" contact person for these manual scan contributions -- or if we should just keep forwarding them through him. I'll let you know what he says after he gets back from the holidays. Hi Greg Dave Cunningham was the original contact when Agilent started looking for older manuals in mid 2005, I don't know if he still is but I'm sure he could point you in the right direction. His email address, at the time anyway, was [EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) regards Nigel GM8PZR ___ 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] Rb references for audiophiles?
In a message dated 04/07/2008 14:51:19 GMT Daylight Time, [EMAIL PROTECTED] writes: Sitting in a waiting room yesterday, I read an article in a very-high-end audio magazine describing a $15K Rubidium frequency standard for providing low jitter clocks to your audio system. It has outputs at 44.1, 48, etc. kHz, as well as a 100kHz, which the person writing said might become a new standard (huh?) Any chance you can remember the name and/or issue number of the magazine? No, I don't want to buy or build one, but I'd love to read a copy of that article:-) regards Nigel GM8PZR ___ 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] TBolt UK import
In a message dated 02/07/2008 15:53:10 GMT Daylight Time, [EMAIL PROTECTED] writes: I understand that items with a declared value of less than 100 pounds will be passed through by UK customs. However above that, VAT (at our standard rate of 17.5%) is added, as well as import duties (if applicable) at about 5% (depending on the item). Carriers will then usually charge a fee for sorting out all the customs paperwork. I have had charges as low as 5 pounds from FedEx, and 8 to 12 pounds from Royal Mail ParcelForce -- Hi Peter Unfortunately the VAT threshold is much lower than £100. Quote from HMRC web site. - If you purchase goods through the Internet you should be aware that customs duty and VAT will be payable, as follows: Customs Duty - if the amount of duty is £7 and over Import VAT - if the value of the goods is £18 and over - On top of that the standard ParcelForce admin charge is £8, increased from £5 a year or so ago. Assuming that the parcel value is correctly quoted it seems to be a question of luck as to whether or not you get charged. I still get packages through with no charge on them, sometimes of quite high value, but I was told by ParcelForce a few years ago that, even then, the number of Customs agents employed at the main ParcelForce sorting centre had increased hugely after the international success of Ebay and other internet sales. For relatively low cost purchases from the US say, that might only just cross the £18 threshold, it's not unusual to receive a small VAT charge but still with the £8 admin fee...ouch!! >From my own experience it would seem there's more chance of not being charged if the UK carrier is anyone other than ParcelForce, but that's certainly not something to rely on:-) regards Nigel GM8PZR ___ 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] HP 105 manual finally scanned
In a message dated 01/07/2008 08:31:28 GMT Daylight Time, [EMAIL PROTECTED] writes: wanted to do this two years ago, but computer events conspired to slow me down. http://www.nixiebunny.com/HP105AB.pdf -- Hi David Many thanks for the file, it's come out well. You could have saved yourself some work though, I don't know how long it's been available but I downloaded a similar copy from Didier's site, albeit lacking the first two pages, in December 2007. regards Nigel GM8PZR ___ 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] Datum 9390
In a message dated 30/06/2008 03:19:57 GMT Daylight Time, [EMAIL PROTECTED] writes: The 9390 manual is in the GPS_Timing directory. Hi Didier Many thanks for that, nice to hear it arrived ok:-), and the changes sound good. regards Nigel GM8PZR ___ 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] Datum 9390
Back again, I've uploaded the 9390 mamual to Didier's site, or at least the upload log says I have, but it's not appearing in the "recently uploaded" files and I see it can't be downloaded directly from there anyway. I'll leave that one to Didier to sort out but, in the meantime will send to Jack as originally agreed and then forward that email, hopefully with file still attached, to everyone else who's asked. If anyone who's asked for a copy hasn't received one a couple of hours after this post has appeared, or if there's any other problems, please let me know and I'll try again. regards Nigel GM8PZR ___ 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] Datum 9390
In a message dated 29/06/2008 19:34:20 GMT Daylight Time, [EMAIL PROTECTED] writes: Can you send it to the upload page at http://www.ko4bb.com/cgi-bin/upload.pl (user 'manuals', password 'manuals', without the quotes)? I could use that one myself... - Hi John, and all I've had several requests for a copy and was just about to suggest that I post it to Didier's web site, only to find you beat me to it:-) Soto all who've asked, I'll upload it shortly, might take a while as my upload speed is slow, and will post another message here when it's done. regards Nigel GM8PZR ___ 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] Datum 9390
In a message dated 29/06/2008 18:18:17 GMT Daylight Time, [EMAIL PROTECTED] writes: Do anybody have a manual for the Datum GPS synchronized Generator. 9390-53111. ?? Or a manual for a model "close" to this? Or know where I can find one? - Hi Jack I've got the manual for the 9390-52054, don't know how similar it is but presumably quite close. I thought I downloaded it from Symmetricom but don't see it there now. It's just over 3MB, if you'd like a copy please send me an email address known to accept this size attachment and I'll send it direct. regards Nigel GM8PZR ___ 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] Thunderbolt control software
In a message dated 24/06/2008 22:25:30 GMT Daylight Time, [EMAIL PROTECTED] writes: My copy of Adobe will not open this -- Open the flood gatesand be prepared to drown:-( ___ 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] Failure to make order for thunderbolt
In a message dated 22/06/2008 14:50:07 GMT Daylight Time, [EMAIL PROTECTED] writes: I am a member of time-nuts and have attempted to place an order for a thunderbolt - but I cannot get past the authorisation. It would appear that I do not have a record of my user name ??? I am Roy Phillips and I have my password on record here. Please can you provide me with my username. Sorry to be an idiot, and trust that you can help. -- That sounds more like an authorisation problem recognising the user name you enterred. Are you sure you entered the user name exactly as given in John's original message, and without the quotation marks? Same applies to the pass word. regards Nigel GM8PZR ___ 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] New member, and HP 5061A question
In a message dated 17/06/2008 00:55:07 GMT Daylight Time, [EMAIL PROTECTED] writes: Actually, one more question - is there any way to search the list archives? Either I'm blind, or there's not, or it's not obvious. -- Hi Bill Welcome aboard, and may your time lunacy be long lived and, of course, to the nearest femtosecond or so:-) I can't help with your question re the 10638A and, in answer to the above, can't comment on your blindness either an optician's probably much better for that but can say that a Google search works wonders for the not too obvious:-) Try here... _http://www.febo.com/pipermail/time-nuts/_ (http://www.febo.com/pipermail/time-nuts/) regards Nigel GM8PZR ___ 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] Thunderbolt and Windows XP
In a message dated 16/06/2008 00:04:30 GMT Daylight Time, [EMAIL PROTECTED] writes: I added a serial switch box. I boot up when the T'bolt serial is switched off and turn on the serial connection with the switch box to do t'bolt mon. Hi Stan I guess that's one way, but there is an easier fix that worked for me and it's shown below. I had a similar problem about a year ago, when testing some Motorola Oncores on a PC running XP, and after asking here was pointed to the following info in the TAC32 manual -- Windows 2000 and Windows XP Microsoft has finally admitted that this is a problem with Windows 2000. The same fix works for Windows XP. In August 2001 they published knowledgebase article Q283063 on this subject, which can be viewed at _http://support.microsoft.com/support/kb/articles/Q283/0/63.ASP_ (http://support.microsoft.com/support/kb/articles/Q283/0/63.ASP) This article has detailed instructions on a complex fix that requires direct contact with Microsoft. The article also suggests a workaround that seems to be very effective. “To work around this problem, allow the [mouse] device to be detected incorrectly, use Device Manager to disable the [mouse] device that is not the port to which the [mouse] device is attached, and then reboot your computer. When you do this, the port works correctly and the incorrectly detected [mouse] device is disabled.” To access the device manager open the System icon in the Control Panel, select the Hardware tab and click on Device Manager. You will find the incorrectly detected mouse in the mouse group. It is often shown as a Microsoft Ball Mouse. Do not delete it as Windows will just detect it and reinstall it (incorrectly) next time. Instead, disable the incorrectly detected mouse device. Open the properties dialog for the incorrectly detected mouse device, select the General tab and, down at the bottom in the Device usage field, select Do not use this device (disable). How do you accomplish this if your mouse is bouncing all over the screen? Disconnect the serial port while you are accessing the Device Manager, of course! Then restore the connection to the CNS Clock II and you are in business. No more problems! -- I used the workaround as shown and have not had any problems since. At the moment I'm running two Thunderbolts and one or the other is permanently connected to COM1, whether the PC is on or off. Once the PC is running I can boot up Tboltmon with either connected and all works as expected. With Tboltmon running I can also hot swap the serial lead to the other Thunderbolt and it will happily report the new data without any problems. Obviously a switch box would be tidier but it's working well so far without one:-) regards Nigel GM8PZR ___ 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] SatStat Error Message ?
In a message dated 23/05/2008 20:13:37 GMT Daylight Time, [EMAIL PROTECTED] writes: reply: -361, "Parity error in program message: The clock seems to work, but I cannot get the Status window to show anything. It just cycles between ..."requesting data" and ..."communicating"... I set the parity to Odd as the manual says. The Z3801A GPS Lock LED is lit and the output looks stable. -- It's a while since I used SatStat, so can't remember the exact messages now, but that does seem reminiscent of the "fun" I had when trying to talk to the Z3801 via an RS422 interface card. That was before I gave up and performed the necessary surgery for the RS232 conversion, after which it was all plain sailing. The Z3801A doesn't need to be able to talk to the software in order to acquire lock and condition the oscillator. regards Nigel GM8PZR ___ 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] HP Z3801A Communications
In a message dated 18/05/2008 02:02:56 GMT Daylight Time, [EMAIL PROTECTED] writes: Thanks for the replies, but I wanted to know if I could access the internal program without converting the data port. It looks like the answer is no, so time to dis-embowel this thing and modify it. -- Hi Dick In theory, the answer ought to be "yes" but, having bought an RS422 card a few years ago specifically to avoid having to convert my Z3801A I never did manage to get it talking and did the conversion anyway. After that, no problem:-) The modification might seem a bit daunting at first but really is very straightforward and does make life a lot easier. regards Nigel GM8PZR ___ 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] HP Z3801A Communications
In a message dated 17/05/2008 22:18:30 GMT Daylight Time, [EMAIL PROTECTED] writes: My copy of satstat says 1995. I don't know anything about Windows, but that sounds old enough that it might work. If you can't find them, I can send you a copy. -- I haven't used satstat for a while but used to run it under Win3.11on a Dolch 486 luggable with no problems. I've just installed satstat5 under XP on this P4 machine and it looks to be running ok, given that the Z3801A isn't connected and there's something else using the COM ports:-), so can't see Win98SE on a 486 being a problem. regards Nigel GM8PZR ___ 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] Administrivia: Please don't use the "Spam" button to unsubscr...
In a message dated 14/05/2008 07:16:13 GMT Daylight Time, [EMAIL PROTECTED] writes: Wouldn't that be kind of a good thing? I mean, can the intersection of the set of AOL members and the set of folks who can understand what we discuss here contain more than a couple of people? And wouldn't it be a GOOD thing to give those folks a good reason to get a REAL ISP and bid AOHell goodbye? - Only a good thing to those not using AOL so hardly a very useful suggestion is it? Not that I'm biased of course:-) regards Nigel GM8PZR ___ 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] HP/Agilent 5065A Rubidium Vapour frequency standard problem -...
In a message dated 11/05/2008 18:15:57 GMT Daylight Time, [EMAIL PROTECTED] writes: I have just found a 10811-60111, and I am wondering if you or another member have the complete schematic for the unit - mine has the PC board # 05328-20027, with "fine adjust" pot and C12 &C15 - or is this the normal format. I have not yet power it up and have noted the advice about adjustment. - Hi Roy I've not found a specific manual for the 10811-60111 but you can download the manual for the 108111A and B via this link. www.hparchive.com/Manuals/HP-10811AB-Manual.pdf regards Nigel GM8PZR ___ 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] HP 5370B
In a message dated 11/05/2008 00:36:37 GMT Daylight Time, [EMAIL PROTECTED] writes: My mistake. If I ever used a measurement beyond it's accuracy to fraudulently claim compliance with customer specification, I'd quickly lose customers. Your business must be different. -- That's a silly response. This has nothing to do with fraudulently claiming compliance, it just started as a well reasoned discussion of tolerances and the implications thereof. ___ 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] Datum/Symmetricom BC637PCI Time andFrequencyProcessor
In a message dated 07/05/2008 17:55:20 GMT Daylight Time, [EMAIL PROTECTED] writes: That was a 7.0.1 version of bc635cpp.exe I will _try_ to boot that HD within a few days. If you have not received the software from elsewhere next week, let me know. - Hi Bjorn Many thanks for that. I've now got a 7v2 copy of bc635cpp.exe that has installed ok under WinXP but I haven't installed the card yet to test it. I'll try that tomorrow, later today now:-), and let you know how it goes. regards Nigel GM8PZR ___ 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] Datum/Symmetricom BC637PCI Time andFrequencyProcessor
In a message dated 06/05/2008 20:17:41 GMT Daylight Time, [EMAIL PROTECTED] writes: I had it running on an winXP disc that crashed a few months ago. -- Was that the earlier version of the software or something XP specific? -- I have an older BC635PCI of the type that had external Trimble Acutime/Palisade for the GPS enabled versions. Anyone else with these Bancomm/Datum/Symmetricom PCI-cards wanting to run them on Linux/*BSD? Should be able to be a great timesource for an ntp-server. Maybe even more interesting would be to evaluate timing accuracy for a normal ntp server. My interest at the moment is only Windows but Google searches for the Windows software turned up quite a few references to Linux drivers and ntp so taking a look online would probably be worthwhile. regards Nigel GM8PZR ___ 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] Datum/Symmetricom BC637PCI TimeandFrequencyProcessor
In a message dated 07/05/2008 07:24:54 GMT Daylight Time, [EMAIL PROTECTED] writes: I took another look for the CDs, but no luck. Can you liaise directly with Nigel to see if you can help him out. - Hi Rob Many thanks for looking, it's much appreciated. I've located what looks to be the earlier Win95/2K version of the basic demo software via a link which, for some reason, Google didn't show on my original searches. Ironically, it's a link into the Time-Nuts archives where an answer some time ago to a similar question offered the url of a Symmetricom download. However, I'm not sure if that would be XP friendly so will contact Greg direct, and continue to keep my fingers crossed:-) regards Nigel GM8PZR ___ 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] Datum/Symmetricom BC637PCI Time and Frequency Processor
In a message dated 06/05/2008 08:17:03 GMT Daylight Time, [EMAIL PROTECTED] writes: I have some CDs in the store room, which Datum produced which have all their driver software on. I know they are in there somewhere, but since moving the last time (domestic split!), I haven't had a chance to sort through a lot of this stuff. Will try to take a look over the next couple of days, and if they are still there, then I'll send it over. -- Hi Rob That's very much appreciated, thank you. I'll keep my fingers crossed. regards Nigel GM8PZR ___ 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] Datum/Symmetricom BC637PCI Time and Frequency Processor
Hi All I've just bought a Datum BC637PCI Time and Frequency Processor on a PCI card from the usual place, model BC635PCI is identical but without the onboard GPS receiver, and am looking for any Windows drivers and/or the basic control software. I've found the manual and other documentation online, also documentation for the very similar Symmetricom BC637PCI_U that replaced it, but cannot find the drivers or software for either. The original Datum config and demo program was BC635CPP.exe, and TRAYTIMECPP.exe was a system clock utility. Symmetricom continued to supply Bc635cpp.exe with the BC637PCI_U but the clock utility was now named TrayTime.exe and there was also some GPS demo software called bc637PCI GPS Demo. I have 7 days after receipt to determine if all is working ok so if anyone can help, particularly with a copy of BC635CPP.exe, I'd be very grateful. regards Nigel GM8PZR ___ 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] LED reliability and sub cables
In a message dated 30/04/2008 21:04:59 GMT Daylight Time, [EMAIL PROTECTED] writes: "life" is measured as elasped timeso I claim immunity from flames!! -- Thanks Alan. I'll remember that when Old Nick finally calls by to collect his dues:-) regards Nigel GM8PZR ___ 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] Z3801
In a message dated 11/04/2008 17:57:31 GMT Daylight Time, [EMAIL PROTECTED] writes: Looks like my HP-Z3801 got zapped in the lighting storm last night. The Voltage Converter Assembly appears to be bad. Not yet sure if it got the mother board also. Are there schematics out there, and can you get replacement parts for the DC to DC converter package. I have searched the K8CU pages and of course have the user manual. Would it be possible to supply the 5/15/-15 volts from and external supply or would that have an adverse effect on the performance of the oven and oscillator. Hi Connie I'm sorry to hear your bad news, let's hope it didn't get the motherboard too:-( I've been looking for a spare PSU module for quite a while now without success. I did think of just building a separate PSU but was a bit wary as the outer oven controller is on the power module and I wasn't sure what that involved. However, I recently came across this web page, which you might find useful... _http://homepage.sunrise.ch/mysunrise/shegnauer/Z3801A/Power%20Supply/z3801a_p ower_supply.htm_ (http://homepage.sunrise.ch/mysunrise/shegnauer/Z3801A/Power%20Supply/z3801a_power_supply.htm) regards Nigel GM8PZR ___ 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] NI PCI GPIB Cards
I hope this post is considered appropriate, if not please let me know and accept my advance apologies. I have several NI PCI GPIB cards that are surplus to my requirements. I was intending to put them on Ebay but thought I would offer them here first. These are the older style and were removed from working test setups. All are in excellent condition and have been tested using NI 488-2 software to control an HP3336A signal generator. I will send them anywhere at a fixed price of £80, eighty pounds, each with the buyer also to pay for insured postage. Paypal payment would probably be easiest although I'm happy to discuss alternatives but can only accept payment in British pounds. Please contact me off list if interested. Just in case anyone's wondering, all these worked first time with no problems and are not the cards I referred to recently that had the onboard oscillator partially unsoldered:-) However, those are also working fine too and I'm planning to use them myself but might be tempted to part with at least a couple if there's sufficient demand. Because of the size of the oscillator package and the very fine soldering used this does seem to be a general potential weakness on these boards and I would recommend anyway that the oscillator is always resoldered. I would be happy to do this and retest if requested. regards Nigel GM8PZR ___ 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] Another Trimble Tbolt question....
In a message dated 30/03/2008 07:47:57 GMT Daylight Time, [EMAIL PROTECTED] writes: My guess is that at least some of the difference that you see in your altitude is from the propagation delay in the cable between your antenna and the GPS module. Guessing still further, I would think that the position as reported would be some distance immediately below the antenna. How long is your cable? If the antenna is stationary, you could move the GPS module to any position within the sphere allowed by your length of cable, and the reported position would stay the same. - I think that's all rather optimistic, as mentioned previously height estimation is the most innacurate parameter to be reported by GPS units. It's also important to remember that the "mean" sea level reference is not necessarily the same as "local" sea level. I am running a Thunderbolt from an antenna at most 10 feet away from the unit with a cable not much longer, so not too much propagation delay. The antenna is quite low but has a good view of the sky and at the moment is tracking seven satellites. Altitude will always vary by at least a few metres whenever it makes a survey, it's currently showing 58.8 metres but previous survey was around 64 metres. That's not bad when you consider that I live in the middle of the Clyde estuary in Scotland, with the water's edge somewhere around 50 feet away from the antenna, and that even with allowance for tidal variations the antenna is, at the most, 3 or 4 metres above the physical water level:-) regards Nigel GM8PZR ___ 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] Tboltmon Serial Port Selection...??
In a message dated 27/03/2008 23:45:09 GMT Standard Time, [EMAIL PROTECTED] writes: Can anyone tell me why, when I click on the Tboltmon icon associated with my Trimble Thunderbolt, that a little Serial Port Selecton window pops up and why does my T-bolt only run after selecting COM-4? Why can't this be selected once and then forgotten about? It seems like an un-necessary step. I get the same pop up but have always assumed it was to allow for the possibiliy that you might have Tbolts connected to more than one, or all, of those sixteen possible ports, so giving you the option to choose which one to monitor. I guess it only runs after you select COM4 because that's the port where it sees your Thunderbolt. I've never considered it to be a significant inconvenience. regards Nigel GM8PZR ___ 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] NI GPIB cards
In a message dated 21/03/2008 02:13:32 GMT Standard Time, [EMAIL PROTECTED] writes: This group seems to be very GPIB savvy, so I have a question (vaguely related to time and frequency) - is there a real difference between the half sized current one large chip NI PCI-GPIB card and the older and larger version with multiple chips that proceeded it ? Which would you buy on Ebay ? any gotchas ? I've no experience of the newer board, so not able to comment on any differences, but I have recently identified one possible gotcha on the older board. Out of a batch of four that were otherwise in excellent, as new, condition I had two that weren't working. Checking the boards showed that U10, the surface mount onboard oscillator, was slightly lifted at one end on each of the faulty boards. It turned out they'd been very lightly soldered and the joints had broken at that end, there was no indication they'd been knocked or otherwise abused. Examination of the two working boards showed similar weak soldering even though the joints on those were still intact. After removing and resoldering the oscillators all boards are working fine. Other soldering on the boards looked ok but these, in surface mount terms anyway, are quite large packages and the original soldering was definitely inadequate. I don't know if this was just a batch problem, or if it's a common issue with these boards, but certainly something to watch out for. Other than that, the boards do all they should and work well. With radio equipment and other kit demanding PCI slots though, I'm finding it more convenient now to use USB GPIB controllers. Aside from a couple of the Softmark units from Australia I have two "proper" units so far, an NI GPIB-USB-A and a CEC USB-488, both of which cost less on Ebay than PCI cards often fetch, although getting them at the right price required a fair bit of patience, and probably a fair bit of luck too:-) One problem with these is that the NI installer for NI-4888.2 identifies the CEC software as an OEM variation of NI-4888.2 and requires it to be uninstalled before the NI software will install. Unfortunately, the NI installed software does not then recognise the CEC unit, and vice versa. There may be a work around for this but I haven't pursued it too far as yet. regards Nigel GM8PZR ___ 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] CTS Knights Oscillator info
Hi All Does anybody have any information please on a CTS Knights 5Mhz oscillator, model number 970-2019-0. It's an ovened oscillator with dual 5MHz outputs on SMA connectors. I have the basic connection and supply info from the can markings but would like to know the specification and any details of the RF Bite and Oven Bite connections. regards Nigel GM8PZR ___ 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] Mounting GPS Antenna on Steel Roof
In a message dated 08/03/2008 13:29:42 GMT Standard Time, [EMAIL PROTECTED] writes: The MAX232, like all RS-232 interface chips I have ever come across, inverts the signal. That'll explain it then:-) ___ 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] Mounting GPS Antenna on Steel Roof
In a message dated 08/03/2008 03:57:02 GMT Standard Time, [EMAIL PROTECTED] writes: The inverter is required because the Motorola GPS receiver uses TTL and the PC serial port uses RS232. RS232 uses a positive voltage of +3 to +25 volts to indicate a logic zero, and a negative voltage of -3 to -25 volts to indicate a logic one. --- My Motorola Oncore test rig uses a Max232 to interface the RS232, no inverter, and works fine. regards Nigel GM8PZR ___ 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] Timing Measurements
Hi All This might be old news but I just came across this link to a Symmetricom presentation on timing measurements and thought it interesting _www.iee.org/OnComms/PN/communications/www.iee.org/OnComms/PN/com_ (http://www.iee.org/OnComms/PN/communications/005%20-%20Lee%20Cosart.pdf) regards Nigel GM8PZR ___ 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] HP 8660-K11 10MHz comparator and Tracor 900 VLF receiver/comparator
Hi All I'm looking for any information, hopefully a manual, for what HP labelled as the "8660-K11 10MHz Ref.Gen" which actually looks to be a phase comparator that compares an external 10 MHz signal with an internal HP10811 reference. There are other 8660-K** units, certainly at least the 8660K-10 Phase Modulation Test Set, and I assume they are all either accessories or calibration kit for the 8660 series of signal generators, but can't find anything on them in HP catalogues. My 8660-K10 has been got at, some reworking of the circuit board and at least one non original IC fitted, so a schematic would be very useful if a complete manual isn't available but anything would be appreciated. I am also looking for information on the Tracor 900A VLF receiver/frequency comparator and, again, anything would be gratefully received. regards Nigel GM8PZR ___ 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] Racal 485 1MHz frequency standard
Hi All I've been offered a Racal 485-1, 1MHz frequency standard and distribution system. >From the photo it's basically a Racal 1MHz ovened oscillator with a 12 way distribution section based on TO92 style plastic transistors. I don't know that it's something I'd use these days as a lab standard but might be interesting just as a curiosity, and the distribution section does take an external input. I've never seen one before, nor even heard of it until now, so would be grateful for any information that might be available. regards Nigel GM8PZR ___ 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] Ovenaire OSC 49-61C
In a message dated 24/01/2008 05:58:16 GMT Standard Time, [EMAIL PROTECTED] writes: A scanned 10811 manual has been available, linked from time-nuts messages in the past. Is that gone? --- No, it's still there, along with the specifications for the different 10811 versions, but I just thought a specific manual for the 10811-60111 could be useful as that seems to be a variant that turns up frequently in HP test gear. regards Nigel GM8PZR ___ 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] Ovenaire OSC 49-61C
In a message dated 23/01/2008 21:07:11 GMT Standard Time, [EMAIL PROTECTED] writes: BTW, a colleague is scanning the 10811-60111 for me. Hi Geoff If you could make the scan generally available, either via email or by uploading it to Didier's site perhaps?, that would be much appreciated. Regards Nigel GM8PZR ___ 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] RCC 8000
In a message dated 30/12/2007 20:11:34 GMT Standard Time, [EMAIL PROTECTED] writes: Thanks for the offer, well I am not in a hurry, just take your time.I have many other project to go on. - I'll keep looking, just as well you're not in a hurry:-) -- About 10-15years ago I tried to copy MFS but due to the close proximity of DCF I was unable to copy maybe I did not pay attention to the selective active antenna and so on. do you think that I will be able? to receive MFS in Frankfurt? -- I can separate them quite easily on a Winradio 313, using just a fairly short length of wire or a "miniwhip" active antenna but I'm not right on top of either, although quite close to MSF in its new location. >From the west coast of Scotland DCF77 is a much weaker signal so not sure how usable it would be with a DCF77 timing receiver. I have no experience of reception in Frankfurt though so can't help there. HKW-Elektronik produce a range of timing related products, I have a Galleon timing module based on their parts, and amongst these they have tuned antennas for both DCF77 and MSF. They might be able to advise on your reception posibilities... _http://www.hkw-elektronik.de/shop_en/shop_assemblys.php_ (http://www.hkw-elektronik.de/shop_en/shop_assemblys.php) regards Nigel GM8PZR ___ 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] RCC 8000
In a message dated 30/12/2007 17:45:51 GMT Standard Time, [EMAIL PROTECTED] writes: Yes , I tried RadioClocks UK but no helping hand...they offered if I ship the unit back to the factory, ??? they give a price for the conversion./ assume to expensive /... ??? I am living about 25km from DCF77 in Germany, so believe the receiver part is not a big deal, ??? but the "code " is different then MSF60 - Hi Ernie I have some paperwork on the RCC8000, part, if not all, of some sort of manual and perhaps some schematics too. If that sounds vague it's because it was sent to me a few years ago and soon ended up in storage. I didn't reply earlier as I couldn't find it at home, which means it's probably still buried in storage and I have no idea when I'm likely to find it. If nobody else has a copy, and you don't mind waiting, I'm happy to share what I've got. It might be soon, but it could be quite a wait. I have a couple of RCC8000s, also buried somewhere so it's a while since I've seen them too, but I suspect any difference, aside from a fairly minor retune of the receiver, is going to be in the firmware. Both mine are for MSF and I have no idea whether or not there will be any firmware information in the documentation I have. I know it'll be a pain if you're so close to DCF77, but I don't think it should be very difficult to knock up a reasonable antenna for MSF, which might make life a lot easier. regards Nigel GM8PZR ___ 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] Stuff I bought
In a message dated 27/12/2007 11:34:23 GMT Standard Time, [EMAIL PROTECTED] writes: I didn't think $300 was too bad, considering the time wasted going back to the desk for a pinout or whatever. The unit uses the Linux (MomtaVista) operating system, so yes it is hackable. No clock of any sort though. It sounds very good. One complaint aimed at some earlier models has been the lack of native PDF support. How does this one cope with A4 pages from manuals etc, can they be scaled to fit or do they require scrolling? regards Nigel GM8PZR ___ 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] Ronald Held's main question
In a message dated 18/12/2007 07:59:49 GMT Standard Time, [EMAIL PROTECTED] writes: The link you get from their page http://tf.nist.gov/timefreq/general/generalpubs.htm is however wrong, as it only gives the front document. Maybe one needs to indicate to them that they should make a propper page for it. I have downloaded the full TN1337 before, so I'll be fine, but they should fix their webpage. Magnus, many thanks for the pointer. The full document is here... _http://www.boulder.nist.gov/timefreq/general/pdf/868.pdf_ (http://www.boulder.nist.gov/timefreq/general/pdf/868.pdf) (http://tf.nist.gov/ofm/smallclock/References.htm) regards Nigel GM8PZR ___ 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] time-nuts Digest, Vol 41, Issue 57
In a message dated 16/12/2007 18:17:18 GMT Standard Time, [EMAIL PROTECTED] writes: i thought of tha balcony option. The balcony as an overhang which effectively blots out the other half of ths sky not covered by the building. I cannot hang any antenna over the railing or on it(in my lease and enofrce;I asked), plus there are birds and squirrels which would get into it. Any other suggestions? --- I can't quite picture the overhang arrangement, but when you consider that a variety of manufacturers supply GPS antennas that are approx 1 1/2 inches square by 1/2 inch deep I'd be very surprised if you couldn't attach one of these somewhere outside without it noticing. They may not have the filtering etc of a "proper" timing antenna but they'd do the job and certainly be a lot less obtrusive. Alternatively, I've used one of these quite succesfully on an internal window sill and am running an Odetics timing antenna just propped up on the same window sill right now. That's feeding an Oncore UT+ timing module in a test jig and tracking 6 of the 8 satellites it can see. Oncore modules, sometimes complete with a small antenna, are regulalrly on Ebay quite cheaply so why not invest a small amount and run some tests? You might find the results are better than expected but even if not you'd at least have some definite answers. regards Nigel GM8PZR ___ 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] 3 lug triax plug.
In a message dated 10/12/2007 20:27:06 GMT Standard Time, [EMAIL PROTECTED] writes: Is it actually triaxial or just three lug? I've some small 3 lug coax plugs about 1/2 the size of a BNC. The one's in the link are the same size as a BNC. Hi Robert You'll really need Bernd to answer that but his original posting certainly didn't mention anything other than it looked like a smaller BNC but with three locking "nipples" as he called them, rather than two. To me, at least, that implied a "normal" single centre pin coaxial connector so I think the conversation might have wandered off track a bit. >From his original comment I suspect that what you've got is likely to be much closer to what he's looking for than a Triaxial BNC. regards Nigel GM8PZR ___ 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] Redifon gk203n Drive unit
In a message dated 22/11/2007 13:57:48 GMT Standard Time, [EMAIL PROTECTED] writes: Hi all Recently i find a Redifon GK203N Drive Unit in a naval scrapyard .Does anybody have the service manual to send me a copy in pdf? Vangelis Hi Vangelis I've just arrived home and seen your earlier email and this one. I can send you the manual in pdf format, it's just over 7 MB. Could you confirm please that the hotmail address you're using can take that size of attachment, otherwise please send me an alternative email address that you know can accept it. regards Nigel GM8PZR ___ 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] PTS X10 System Section Manual
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi All I've just uploaded a scan of the complete System Section from the PTS X10 manual to Didier's web site. This includes the programming information plus a general description of the unit and schematics for the power supply and BCD interface. I hope to scan the rest eventually but it's not likely to be anytime soon. Anyone requiring specific info is welcom to ask and I'll do what I can to help. regards Nigel GM8PZR ___ 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] HP-3336A Level Generator manual
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 13/11/2007 17:23:15 GMT Standard Time, [EMAIL PROTECTED] writes: I have still to check my unit but I am afraid PROMS are soldered... I hope to have some time over the weekend. Sorry for delay ! BTW, I also have an 'A' (working) and a 'B' (parts unit) and I can tell for sure that firmware is the same, because I swapped digital boards among them and unit works fine ;-)! - That's a pain:-( I'm certainly not set up at the moment to remove ICs from PCBs without risk of damage and don't have any means of reading the Proms in circuit. I'll still take a look anyway if I can get access to the units. regards Nigel GM8PZR ___ 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] HP-3336A Level Generator manual
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 13/11/2007 15:15:26 GMT Standard Time, [EMAIL PROTECTED] writes: I have found a pdf copy of the Manual with full schematics for the ABC including optuion 5. If you still require it, let me know where I can send it? Now I am keen to get my 3336 going and I am after the ROM images for the 3336! There appear to be 2 revs of control boards, one has 1 PROM the older one has 4 PROM. Either will do, as I have a spare 3325 control board I bought off ebay which is the identical board except for the firmware. Hi Mark A very definite "Yes Please" to a copy of the manual:-) This email address will handle attachments up to 16MB or you might want to upload it to Didier's web site then I, and anyone else interested, could download it from there. Purely by coincidence, my two 3336s are amongst those items I've pulled out of storage:-) I've got an A and a B but the difference only seems to be in the outputs so I wouldn't expect there to be any firmware differences. They're not very accessible right now, part of a pile just stacked on top of each other inside one of the racks whilst I work my way along making and fitting shelf brackets, but I'll be working out there again tomorrow so will try to get one out and take a look inside. Reading the Proms shouldn't be a problem as long as I can get to the units and the Proms aren't soldered in. I'll email you off list tomorrow and let you know of any progress. regards Nigel GM8PZR ___ 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] GPS Jamming in the UK
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY I've not come across this before and when a friend first fowarded the link from another group I thought it was a spoof, and still only half convinced:-), but I've just copied this from the official Ofcom Website in the UK.. "The Ministry of Defence conduct occasional tests on military systems which may result in some loss of service to civilian users of the Global Positioning System (GPS) including in-car navigation devices and networks which rely on GPS signals. Ofcom seeks to provide citizens and consumers with information about possible interruptions to these services via these email updates giving advanced notification of these tests. It must be emphasised that this notification process only warns of future jamming excercises that are brought to the notice of Ofcom and may not cover all jamming exercises. It cannot be assumed that any loss of service is due to jamming exercises." There's an option to sign up for email notification. _http://www.ofcom.org.uk/static/subscribe/select_list.htm_ (http://www.ofcom.org.uk/static/subscribe/select_list.htm) Anyone come across this before or actually experienced any identifiable jamming of signals? regards Nigel GM8PZR ___ 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] Manual PTS X10
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 11/11/2007 19:41:56 GMT Standard Time, [EMAIL PROTECTED] writes: I don't know anything, specifically, about the X10, but here is a link to general information on PTS synthesizers that I condensed after searching for information on a PTS 250 a couple years ago. http://www.xertech.net/Tech/PTS.html -Rex -- Hi Rex It is very similar, as are most of the PTS series, but with some differences, particularly in that the x10 uses something called odd or even mode switching. According to the manual this selects odd or even step boundaries for a 2 MHz bandwidth over which phase-continuous switching will occur. This uses pin 43, one of the 100MHz control pins on the wider range units, the 100 Mhz control of course not being needed on the X10. I've not used my X10, nor studied the manual in much detail, so don't know yet if there are other differences but that one's the most obvious. Ironically, when I got hold of this manual a few months ago I also got one for the PTS250. Again I only have it in printed form although I do hope to get it scanned eventually. In the meantime, if you still have your unit and need any specific info pleaae feel free to contact me. regards Nigel GM8PZR ___ 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] Manual PTS X10
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 11/11/2007 15:56:51 GMT Standard Time, [EMAIL PROTECTED] writes: I am looking for the PTS X10 manual. Specifically, I am interested in the programming part. Has anyone of you this manual in electronic form? Best regards und thanks Juerg - Hi Juerg I do have the PTS X10 manual but only as a printed copy. I can't see any reference to a GPIB interface option for this one in the manual so assume you have the BCD interface with Amphenol connector. Could you please confirm on that? I'm very busy right now, just stopped for a quick coffee, but could scan the relevant pages for you later. "Later" might mean a day or so but I will certainly do it if nobody can provide you with an electronic copy. If it is available in electronic format, I too would be grateful for a copy. regards Nigel GM8PZR ___ 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] Administrivia: The Spam Button
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 10/11/2007 23:04:14 GMT Standard Time, [EMAIL PROTECTED] writes: I just received a bad-boy message from AOL relating to the "Mini Magnetic Sensor" email that was posted to the list this afternoon. These messages usually result from an AOL subscriber hitting the "Spam" button on a message, often because they want to unsubscribe from the list but don't know how. Unfortunately, AOL keeps track of the number of times that happens, and if it's too often, it is blacklisted -- which means that NO address from that system can be sent to ANY AOL subscriber. Getting cleared from the blacklist is a very painful process (I've had to do it...). So, please, if you no longer want to receive time-nuts postings, or if you don't like a posting, please unsubscribe using the instructions at the bottom of every list message; if all else fails, please contact me. But please DON'T hit the "Spam" button! Thanks John It wasn't me, but you've just explained something that's been bugging me for a while. I lost access to my Teknet manual download account a while back, the explanation being that AOL had blocked them from sending to any AOL user. When they complained, AOL refused to deal with them because they weren't an AOL client, that's what Teknet told me anyway, so Teknet passed it back to their AOL users and made it our problem. The AOL instruction to me, when I tried to query it, was to ask the sender to contact them to resolve the problem, which smells strongly of a very lost cause:-( The Teknet free download option requires the user to agree to accept mailshots for, I think, a two year period. I can see that some might end up dumping the mailshots as spam if they no longer want them, and can understand now why AOL have blocked all Teknet emails. I still don't have access to Teknet, but value my Time-Nuts link far more, so certainly hope your message gets through. regards Nigel GM8PZR ___ 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] 10544B datasheet
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 09/11/2007 05:56:31 GMT Standard Time, [EMAIL PROTECTED] writes: Anyone want a scanned copy of a 10544B datasheet? Bruce Yes Please I have the A but not the B regards Nigel GM8PZR ___ 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] WinOncore
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Tom I have WinOncore12 and will send you a copy direct. "Easily" may not be the best description as it defaults to not displaying data after a test, and some other commands, but should be basically ok. TAC32 is much better but does shut down to minimal functions eventually if not registered. must get round to doing that:-) regards Nigel GM8PZR ___ 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] Redifon Drive Unit - not quite on topic!
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 30/10/2007 20:13:42 GMT Standard Time, [EMAIL PROTECTED] writes: I'm clutching a few straws here, but as T&F enthusiasts you might see a connection to what I'm after. I am looking for any information (manual or whatever) for a 1980s vintage Redifon exciter, the DU505M Synthesized Driver Unit. I can send a photo if it might help. Some hint as to where to look for this information would be most helpful. Do you know any Redifon collectors or archives? I am keen to use this nice unit as a source for precision propagation experiments, and as a 30m beacon. It is single reference synthesized and runs all sorts of modes (including ISB!) I plan to use it in conjunction with a GPS disciplined reference. Output is about 50mW, or just under 1mW/kg! Hi Murray Information on the DU5xx series seems quite hard to come by. I've got manuals for the earlier GK203N and SD1 drive units but also have a DU500 that needs some TLC and I've found nothing for that. I don't know how close the DU505 is to the DU500 but if you find anything I'd certainly be interested in taking a look. regards Nigel GM8PZR ___ 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] Time Interval Counter by Standard Electric Time Co
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 19/10/2007 07:28:57 GMT Daylight Time, [EMAIL PROTECTED] writes: Still looking for info on the O-1814/GRC-206 Rb source and it's Efratom M100 Rb brick. see: http://www.prc68.com/I/O1814.shtml -- Hi Brooke The M100 manual can be found here, along with some other interesting stuff. _http://www.to-way.com/_ (http://www.to-way.com/) regards Nigel GM8PZR ___ 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] 60khz NTP Server?
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 18/10/2007 22:49:06 GMT Daylight Time, [EMAIL PROTECTED] writes: Does anybody know of a product that is an NTP server that gets its time source from WWVB at 60khz? There are lots of "Atomic Clocks" out there but I haven't seen one that does what I want. If I had money I'd be purchasing Symetricom SyncServers (I don't) and a lot of locations don't have Internet. Hi Tom This is Galleon, just one example, I'm sure there's others. _http://www.ntp-time-server.com/time-server/solid-state-ntp-server.html_ (http://www.ntp-time-server.com/time-server/solid-state-ntp-server.html) I've used the small battery operated serial port clocks from Galleon, MSF version, and discovered that the hardware in those came from HKW in Germany _http://www.hkw-elektronik.de/englisch/products/products.php_ (http://www.hkw-elektronik.de/englisch/products/products.php) With their parts you might even build your own:-) regards Nigel GM8PZR ___ 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] HP Journal 10811 article
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 16/10/2007 16:11:18 GMT Daylight Time, [EMAIL PROTECTED] writes: I´ve just tried to download this interesting article here: http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1981-03.pdf, but page 20 appears blank. Does anyone have this page? I've got a lower resolution copy of the complete journal and that has page 20 ok. I'll email it to you direct. regards Nigel GM8PZR ___ 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] Improving the stability of crystal oscillators
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 10/10/2007 19:34:55 GMT Daylight Time, [EMAIL PROTECTED] writes: We bought them as a replacement part from Yaesu USA. This data is 10 years or more old, but here you go: Part NameYaesu Part NumberMurata Part Number Posistor G9090019PTH507A01BG330N020 - I don't know if this is the same part, Ebay Ref...110177471348, but this seller has been selling these two at a time for quite a while. Might be ok if you just want a couple to play with, probably not ideal for planning a production run:-) regards Nigel GM8PZR ___ 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] Basic regenerative-divider questions
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 29/09/2007 23:28:23 GMT Daylight Time, [EMAIL PROTECTED] writes: Yep, but usually they're not quite _that_ nonlinear. :) I'm used to thinking of mixers as linear devices, from the IMD/IP3 perspective. Am I missing something here? I always thought mixers were non linear by definition, and relying on that non linearity to function:-) regards Nigel GM8PZR ___ 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] M$-Vi$ta-compliant PC RTC clock card?
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 20/09/2007 12:28:40 GMT Daylight Time, [EMAIL PROTECTED] writes: Hi Nigel, The ClockBlock is more suited to the main processor clock as it's only specified down to a few hundred kilohertz. It would be OK with a post-scaler though. --- Whoops Good point:-) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] M$-Vi$ta-compliant PC RTC clock card?
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 20/09/2007 08:24:18 GMT Daylight Time, [EMAIL PROTECTED] writes: Being a hardware kind of guy, my approach would be a little different. Why not remove the 32.768kHz crystal and feed the existing RTC with 32.768kHz divided down from a decent oscillator? Hey, I just thought, maybe there is a market here. Maybe there is:-).. _http://www.tapr.org/kits_clock-block.html_ (http://www.tapr.org/kits_clock-block.html) regards Nigel GM8PZR ___ 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] OT: Connecting Racal 1992 to GPIB
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 17/09/2007 01:16:14 GMT Daylight Time, [EMAIL PROTECTED] writes: Nigel, You are welcome to upload any manual to my web site, the instructions are at the top of the directory: Hi Didier That sounds good to me, will upload it after sending this and email you directly to confirm As I said previously, I've got at least three seemingly different manuals for the 1991/1992. I haven't checked for significant differences but don't suppose the core information will vary much and this one does seem to have the most pages.. so that must be good:-) regards Nigel GM8PZR ___ 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] OT: Connecting Racal 1992 to GPIB
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 16/09/2007 22:14:29 GMT Daylight Time, [EMAIL PROTECTED] writes: As far as i know my mailbox is capable receiving large files. Can you send me the full manual to this mail address? ([EMAIL PROTECTED]) --- Hi Harry Will do. BTW, it looks like you were right about there being different manuals, I seem to have at least three:-) I'm sure they're all going to be similar but some chapter headings are certainly different. Let's start with this one and see how we go. regards Nigel GM8PZR ___ 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.
