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

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

[time-nuts] HP 3335A for the impoverished experimenter

Group, I have the subject frequency synthesizer and the expanded foam shipping container it arrived in. I also have to move to an apartment in a life care community in two weeks. True, the focus of this list seems to be on 10 MHz, but if you'd like to experiment with precision frequencies

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

Driscoll wrote a lot about oscillators over the years. I couldn't find anything specific to discontinuous operation. Do you have a titel of a paper related to this? What Driscoll was talking about was self limiting in a transistor. That is discontinuous operation, although Driscoll doesn't

Re: [time-nuts] NAVSTAR proteus GPS time and frequency unit

Magnus, Thanks for the detailed reply. I haven't had a need (read: no customer has paid me to do so...) to wallow through the GPS ICD, so that document is foreign to me. Your explanation clarifies the situation... Now it makes sense. Thanks! -Chuck Harris Magnus Danielson wrote: Chuck,

[time-nuts] Using borked Galileo sats to measure relativity

http://www.theregister.co.uk/2015/11/10/borked_eu_gps_satellites_braincheck_einstein/ Now, for 140E-6 bonus points, spot the error in the article... ___ time-nuts mailing list -- time-nuts@febo.com To

Re: [time-nuts] NAVSTAR proteus GPS time and frequency unit

GPS Time ignores (does not deal with) "Leap Seconds." It is dealt with in the software translation from GPS time to UTC or local time. That is part of the reason there is a 16 second time difference between GPS Time and UTC/local time. --- Graham == On Mon, Nov 9, 2015 at 4:15 PM, Chuck Harris

Re: [time-nuts] Dipleidoscope

On 2015-11-09 15:05, Larry McDavid wrote: Actually, it is an Edward John Dent dipleidoscope, or E. J. Dent, not I. E. Dent. But, hand engraving an "I" is much easier than engraving a "J" so many (not all) dipleidoscope covers were in fact engraved, "E. I. Dent." This letter substitution is

Re: [time-nuts] Dipleidoscope

Hi Jim: There's some info at: http://www.prc68.com/I/Dent.shtml Mail_Attachment -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html http://www.prc68.com/I/DietNutrition.html James Hazi wrote: Hi, I am trying to get in touch with larry McDavid ,

Re: [time-nuts] NAVSTAR proteus GPS time and frequency unit

paulsw...@gmail.com said: > Hmmm then why do I have to figure it out at all? I don't care what the date > says. > Only that the Austron locks and does its frequency offset compare. It would > be great not to have to do this. If you don't care about the date, then don't worry about it. It will

[time-nuts] Dipleidoscope

Hi, I am trying to get in touch with larry McDavid , I came across a I.E. Dent Dipleidoscope and I was wondering if he would give me some insight on it. I would be able to send some pictures if you would request. Thanks, Jim

[time-nuts] HP 53131A display dim

Hi, Thanks for the replies. Only a couple digits are dim so I guess it must be the VFD? I suppose the only source is to find an otherwise dead unit to strip it out of? Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Dipleidoscope

James, I have several Dent Dipleidoscopes and gave a presentation on them at a recent NASS Conference. Please feel free to contact me. Lacking an observatory transit instrument, they were the best source of accurate time in the 1850's. Larry lmcda...@lmceng.com On 11/9/2015 9:16 AM, James

Re: [time-nuts] NAVSTAR proteus GPS time and frequency unit

Hmmm then why do I have to figure it out at all? I don't care what the date says. Only that the Austron locks and does its frequency offset compare. It would be great not to have to do this. Regards Paul WB8TSL On Sun, Nov 8, 2015 at 9:06 PM, Magnus Danielson wrote:

Re: [time-nuts] HP 3335A for the impoverished experimenter

The phase noise of the 3335A is typically much better than spec. Definitely way better than a 3336C and has one of the worlds best laser-trimmed attenuators. The 8642A and 8662A are better on phase noise, but much harder to keep working. Anyone wanting a great signal generator should jump at

Re: [time-nuts] Dipleidoscope

Cool! - never new such a thing existed. I presume you've googled and come up with the book by Dent on its use via google books? https://books.google.com/books?id=9QlbQAAJ=frontcover=gbs_ge_summary_r=0#v=onepage=false Brent On Mon, Nov 9, 2015 at 12:16 PM, James Hazi

Re: [time-nuts] NAVSTAR proteus GPS time and frequency unit

Well for the heck of it I just fired the austron 2201 up. Date was circa 1980 or something way back. Guess the battery went. That said set the date and time to UTC and let it go. Almanac seems to grab a satellite every now and then but it does not go into the full track mode. I normally cheat this

Re: [time-nuts] NAVSTAR proteus GPS time and frequency unit

Seems to me that there is more to this than just getting the displayed date wrong. It is true that the date will present wrongly, but what about leap seconds? If the GPS week rolls over at 1024, how will the GPS figure out which is the proper calendar date to apply the leap second? -Chuck

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

Hi With only one or two digits - check the connections and make sure it’s not a driver issue. (Yes, it’s a custom part so either you get a parts unit counter or a HP spare part). Bob > On Nov 9, 2015, at 1:12 PM, cdel...@juno.com wrote: > > Hi, > > Thanks for the replies. > > Only a

Re: [time-nuts] Dipleidoscope

I have several original printed Dent manuals as part of my dipleidoscope collection. I have confirmed identifying instant of local solar noon within 6 seconds; with the optional magnifying telescope, three seconds is possible. Not bad for the common man in 1850! Sent via the Samsung

Re: [time-nuts] NAVSTAR proteus GPS time and frequency unit

OK great conversation. Not sure when but far sooner then later will fire the system up and just let it run for a week. Regards Paul WB8TSL On Mon, Nov 9, 2015 at 1:09 PM, Hal Murray wrote: > > paulsw...@gmail.com said: > > Hmmm then why do I have to figure it out at

Re: [time-nuts] Dipleidoscope

Actually, it is an Edward John Dent dipleidoscope, or E. J. Dent, not I. E. Dent. But, hand engraving an "I" is much easier than engraving a "J" so many (not all) dipleidoscope covers were in fact engraved, "E. I. Dent." This letter substitution is similar to that seen in the often-engraved,

Re: [time-nuts] NAVSTAR proteus GPS time and frequency unit

Chuck, Because all the leap-second info is kept in GPS-calender form, and essentially indicating current leap-second difference and which GPS week (modulo 256). Check out the ICD for yourself, IS-GPS-200H: 8<--- 20.3.3.5.2.4 Coordinated Universal Time (UTC). Page 18 of subframe 4 includes: