I really like the 5334s (either A or B; the A is actually a more featureful instrument than the B) and I have five or six of them; I didn't pay more than $100 for any of them. And, most of them have 10811As, so I figure worst case I can throw the counter out and still get my money's worth from the oscillator! John ---- Didier Juges said the following on 10/22/2006 09:02 PM: > It just so happen that I also have an HP 5334B, which I bought when I > had given up on getting an HP5370 for a *reasonable* cost, considering > my application. It draws 20 VA instead of 200, but this one does not > have the 10811 time base. This will also be a lot easier on the UPS, as > we do loose power here somewhat regularly (but not for long, unless a > hurricane is involved) during the stormy season. > > Thanks for another great suggestion. > > Didier > > John Ackermann N8UR wrote: >> Dr Bruce Griffiths said the following on 10/22/2006 07:19 PM: >> >> >>> An inexpensive modern time interval counter with a power dissipation of >>> less than 10 watts and a resolution comparable to the 5370 would be >>> useful for such comparisons especially if the experiment lasts several >>> months. >>> >> I don't usually use the 5370 for long-term measurements, as it does make >> a very noticeable amount of heat. Since the long term averages don't >> really need super resolution, I find that an HP 5334 counter, which has >> 2ns resolution and dissipates far less heat, works well. >> >> My current experiment is using a 5334 along with a GPIB-controlled coax >> switch (forget the HP number right now) to do 100 second averages of six >> combinations (CS1-GPS, CS2-GPS, RB1-GPS, CS2-CS1, RB1-CS1, and RB1-CS2) >> so I end up with a tau of 600 seconds and ~200ps resolution with the 100 >> sample average. >> >> John >> >> _______________________________________________ >> time-nuts mailing list >> time-nuts@febo.com >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> >> > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >

Check out http://www.deluoelectronics.com/customer/home.php The stuff is designed to work with a laptop via USB or Bluetooth, under $100. I tried it several years ago and found it OK, but I seldom get lost. Regards, Bill Hawkins -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of xaos Sent: Sunday, October 22, 2006 1:43 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] GPS unit for car navigation -OT ?? Hello everyone, I have, until now, resisted the urge to buy a GPS navigation system for my car. However, I now have to do some traveling and new and unknown addresses keep popping up. There are several different GPS units on the market and they all look OK (i guess). I just want to know which units do the members here consider to be the best for this sort of thing? Many thanks in advance, -George Hrysanthopoulos, N2FGX _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Robert Lutwak wrote: > How's the timing accuracy? > > Does it display GPS time or does it have it's own clock? > > > -RL > > ------------------------------------------------------------ > Robert Lutwak, Senior Scientist > Symmetricom - Technology Realization Center > 34 Tozer Rd. > Beverly, MA 01915 > (978) 232-1461 Voice RLutwak@Symmetricom.com (Business) > (978) 927-4099 FAX Lutwak@Alum.MIT.edu (Personal) > (339) 927-7896 Mobile > The Garmin StreetPilot 7200 is not a timing receiver. It displays local time of day in hours and minutes, and seems to update the minute at the correct time, to within a tenth of a second or so. But that's just by comparing with my radio-controlled wristwatch (WWVB receiver). > ----- Original Message ----- > From: "James Maynard" <james.h.maynard@usa.net> > To: "Discussion of precise time and frequency measurement" > <time-nuts@febo.com> > Sent: Sunday, October 22, 2006 7:12 PM > Subject: Re: [time-nuts] GPS unit for car navigation -OT ?? > > > >>xaos wrote: >> >>>Hello everyone, >>> >>>I have, until now, resisted the urge to buy a GPS navigation system for >>>my car. >>>However, I now have to do some traveling and new and unknown addresses >>>keep popping up. >>> >>>There are several different GPS units on the market and they all look OK >>>(i guess). >>> >>>I just want to know which units do the members here consider to be the >>>best for >>>this sort of thing? >>> >>>Many thanks in advance, >>> >>>-George Hrysanthopoulos, N2FGX >> >>I really like my Garmin StreetPilot 7200. Its GPS receiver has WAAS >>correction capability, it has a built-in database of street maps for the >>entire USA, and its large display, perched atop the dashboard of my car, >>is very readable to my aging eyes. In my car, my view of the >>speedometer is obscured by the steering wheel, so I use the GPS receiver >>as my primary speedometer display, too. >> >>I usually set it just to display a moving map. In that mode, it shows >>the name of the next cross-street that I will encounter at the top of >>the screen -- much easier to read with my aging eyes than the street >>sign on the corner! It also shows my speed and the time of day. >> >>Occasionally I will set it to compute a route for me to follow, >>particularly when driving to someplace unfamiliar. In that mode, it >>doesn't display the time of day, but instead displays the estimated time >>of arrival at the distination -- something that I'm not as interested in >>knowing. At intersections where the calculated route changes from one >>street or highway to another, it zooms in automatically as I approach >>the intersection and zooms out automatically after making the turn. >> >>It didn't hurt that, as a Garmin employee, I got a nice employee discount! >> >>---- >>James Maynard, K7KK >>Salem, Oregon, USA >> >> >> >>_______________________________________________ >>time-nuts mailing list >>time-nuts@febo.com >>https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > . > -- James Maynard Salem, Oregon, USA