Re: [time-nuts] Austron 2200A Manual

Robert, I'm 99% certain that Trimble didn't use down conversion on their GPS engines even on this older unit. Unfortunately even if you get the manual, it will probably only be operational as Datum were always very guarded about providing schematics etc to customers! Will see what I can glean fro

[time-nuts] Ok for thae manual BOB

Dear Bob, You save my lab!! I need : 12812282 Antenna for 2200/2201 GPS 2200 GPS 2200 GPS - Assorted module manual (very large!) 2200 GPS - OCXO Module 2200 GPS - Rubidium Module 2200/2201 GPS - IEEE-488 Interface 2200/2201 GPS - Input Buff

Re: [time-nuts] Three subjects.

Yes, there were a similar product produced for schools and offices that synchronized the clocks to a master kept in the office though it lacked the function for bringing a generator output into line. For a time, before quartz, the very best observatory clocks were a pendulum variety with a 'ma

Re: [time-nuts] Ok for thae manual BOB

Hi Luciano! Thanks for the input!! Will check and let you know how much this lot will cost to mail. Quite a large package so fairly expensive I guess. Will get back shortly with cost. All Austron manuals usually have schematics but the Datum 9390-53100 will not. Back soon. Rob -Original

Re: [time-nuts] Ok for thae manual BOB

Luciano, I have two prices for you to send manuals from UK to Italy:- Parcel Force (Tracked) - £50 Sterling delivery quoted 5-7 days Data Post (Tracked and signed for) - £80 Sterling delivery quoted 1-14 days Let me know which and your address details via direct email to me at [EMAIL PROTECTED]

Re: [time-nuts] GPS receiver replacements for UT+

"Charles S. Osborne" <[EMAIL PROTECTED]> writes: > If this has come up before, I must have missed it. Frequent lightning storms > in summer keeps me in the hunt for these boards. Even with lightning > protection on the coaxes the EMP still gets a few every year. Ever tried a reradiating antenna t

[time-nuts] Quartz assisted pendulum clock.

Earlier this week I made a claim that I am a Time Nut from way back. In further evidence of that, I report that I actually clipped and saved that article. Reference: Scientific American, September 1974, pages 192 - 198, in a section called The Amateur Scientist. The man made a quarts crystal o

Re: [time-nuts] GPS receiver replacements for UT+

Reradiating the GPS antenna signal for isolation is an interesting idea. I had not considered it. I had a Trimble Scout handheld GPS that used that method to couple in a magnet mounted car rooftop GPS antenna signal into the built in antenna inside the handheld. It used a little clip on reradiating

Re: [time-nuts] Quartz assisted pendulum clock.

Dennis O'Keefe wrote: > Earlier this week I made a claim that I am a Time Nut from way back. In > further evidence of that, I report that I actually clipped and saved that > article. > > Reference: Scientific American, September 1974, pages 192 - 198, in a section > called The Amateur Scientist

Re: [time-nuts] Quartz assisted pendulum clock.

I don't have a electronic way to distribute this article, but will mail a photocopy to the first ten people who request them directly to me at [EMAIL PROTECTED] There are several diagrams and tables that would make a text-only copy useless. Dennis O'Keefe New Paltz, New York > If you have

[time-nuts] Eftratom Model FRS-C 10Mhz Rubidium Oscillator

We are disposing of a number of these excellent units. If you have, or know anyone who has, an interest in purchasing one, let me know. They are being listed on Ebay (eg. item 5850482012). Please distribute as you wish. They are available in Houston, Texas, but I will ship worldwide. Best regards M

Re: [time-nuts] Three subjects, one selected.

Hi I remember this article. A pendulum clock was made more accurate by " harmonic locking " the pendulum to a crystal oscillator. A small magnet was attached to the pendulum and fitted to pass through a solenoid at one end of the pendulum's swing. The solenoid was driven with a signal that was

Re: [time-nuts] Jupiter GPS receiver

From: Brian Kirby <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Jupiter GPS receiver Date: Wed, 04 Jan 2006 20:59:13 -0600 Message-ID: <[EMAIL PROTECTED]> > I looked in my data and their spec sheet shows +/- 1 microsecond. But, > I beleive this was much better than that. I cannot find it, but I

Re: [time-nuts] Jupiter GPS receiver

Magnus Danielson wrote: > >>I looked in my data and their spec sheet shows +/- 1 microsecond. But, >>I beleive this was much better than that. I cannot find it, but I >>beleive I seen a report where somebody compared the Jupiter and it was >>in the 120 to 150 nanosecond class. > > > +/- 1 m

Re: [time-nuts] Quartz assisted pendulum clock.

Arghhh the purist in my recoils at 'modernizing' an antique French timepiece There would probably be some benefit to making the pendulum (or balance) consistently a bit slower than the quartz standard so that the pull is always in the same direction to avoid hunting (it's interesting that many

Re: [time-nuts] Quartz assisted pendulum clock.

Arghhh the purist in my recoils at 'modernizing' an antique French timepiece There would probably be some benefit to making the pendulum (or balance) consistently a bit slower than the quartz standard so that the pull is always in the same direction to avoid hunting (it's interesting that many

Re: [time-nuts] Quartz assisted pendulum clock.

> The man made a quarts crystal oscillator that sent a pulse to an electromagnet > that was placed near a permanent magnet mounted on the pendulum of a wall (not > a grandfather) clock. The pendulum was set a bit slow for its 72 per minuet > beat and the electronics gave it a push each cycle to mak

Re: [time-nuts] Jupiter GPS receiver

From: Alberto di Bene <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Jupiter GPS receiver Date: Thu, 05 Jan 2006 19:02:25 +0100 Message-ID: <[EMAIL PROTECTED]> > Magnus Danielson wrote: > > > >>I looked in my data and their spec sheet shows +/- 1 microsecond. But, > >>I beleive this was much bett

Re: [time-nuts] Jupiter GPS receiver

> Just curious on another topic : I have seen advertized GPS boards with 20-channel > capability, Given that, at least based on my direct experience, even with a clear > horizon you rarely have 12 satellites in view, what does buy you having that > capability available? TNX. Those are Glonass + G

[time-nuts] (no subject)

Tom, It's basically a non-issue for timing receivers, because as you say you never see abov 12-13 SV's under even the best conditions. The one application where a 20 channel receiver "could" make a difference is in cold start performance as you have more channels to search wi

Re: [time-nuts] Quartz assisted pendulum clock.

At 01:37 PM 1/5/2006 , Tom Van Baak wrote: > >A small subset are NAWCC Horological Science >Chapter #161. This is a group of modern pendulum >clock makers and are driven more by the amazingly >deep science and technology of vintage and modern >precision pendulum clocks than the art and fashion >of

Re: [time-nuts] Jupiter GPS receiver

Alberto di Bene <[EMAIL PROTECTED]> writes: > Just curious on another topic : I have seen advertized GPS boards with > 20-channel > capability, Given that, at least based on my direct experience, even with a > clear > horizon you rarely have 12 satellites in view, what does buy you having that >

Re: [time-nuts] Jupiter GPS receiver

"Tom Van Baak" <[EMAIL PROTECTED]> writes: > > Just curious on another topic : I have seen advertized GPS boards with > 20-channel > > capability, Given that, at least based on my direct experience, even with > a clear > > horizon you rarely have 12 satellites in view, what does buy you having > t

Re: [time-nuts] Quartz assisted pendulum clock.

"Tom Van Baak" <[EMAIL PROTECTED]> wrote: > One last thing I should point out is that for every > person on this "electronic timekeeping" time-nuts > list there are a hundred old guys out there who > collect old mechanical clocks and watches. They > are members of the NAWCC (National Association >

[time-nuts] In need of HP5062C Op & Service Manual

Greetings, Checking to see if anyone out there has any 'original' manuals for an HP5062C or HP5062C (Opt. 010) that they can part with and would be willing to sell. Both the Op and Service manuals are hereby requested. If you can pass the word for me in other circles, I would also appreciate i

Re: [time-nuts] Jupiter GPS receiver

They provide redundancy and for carrier phase surveying, probally quicker solution times. For timing, it would just be better redundancy Brian Tom Van Baak wrote: >>Just curious on another topic : I have seen advertized GPS boards with >> >> >20-channel > > >>capability, Given that,

Re: [time-nuts] Quartz assisted pendulum clock.

[EMAIL PROTECTED] wrote: > Arghhh the purist in my recoils at 'modernizing' an antique French timepiece > I can see that. Although there are no permanent modifications required. Just a magnet attached to a pendulum (screw onto thread on pendulum, which is threaded) and the rest is electromagne

Re: [time-nuts] Quartz assisted pendulum clock.

> I can see that. Although there are no permanent modifications required. > Just a magnet attached to a pendulum (screw onto thread on pendulum, > which is threaded) and the rest is electromagnetically coupled. I didn't read the earlier part of the thread, so maybe this is how the stabilizer actua

Re: [time-nuts] Quartz assisted pendulum clock.

John Miles wrote: >> I believe Big-Ben in the UK can be corrected by adding pennies to it, so >> providing an upwards force. That is what I am told, but I must admit it >> seems a bit unlikely. Perhaps possible if there are a lot of pennies >> there. Apparently this is done, as it allows correctio

Re: [time-nuts] Quartz assisted pendulum clock.

From: Chuck Harris <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Quartz assisted pendulum clock. Date: Thu, 05 Jan 2006 23:53:38 -0500 Message-ID: <[EMAIL PROTECTED]> > John Miles wrote: > > >> I believe Big-Ben in the UK can be corrected by adding pennies to it, so > >> providing an upwards force

Re: [time-nuts] Quartz assisted pendulum clock.

> > Sounds like the same idea as the regulator weight tray on the GE master > > clock described on that Telechron site. You're supposed to add/remove > > weights from the tray until the clock is running at the desired rate. > > A pendulum swings at the same rate, regardless of its weight. > The c