[time-nuts] Rubidium Cesium video

For those of you who are both chemists and time nuts, here's an amazing video about rubidium and cesium... http://video.google.com/videoplay?docid=-2134266654801392897 Do any of the UK readers know the background to this? /tvb ___ time-nuts mailing

Re: [time-nuts] Rubidium Cesium video

At 11:18 PM -0700 10/28/06, Tom Van Baak wrote: For those of you who are both chemists and time nuts, here's an amazing video about rubidium and cesium... http://video.google.com/videoplay?docid=-2134266654801392897 Do any of the UK readers know the background to this? /tvb Marvelous video!

Re: [time-nuts] looking for HP 3738A external pin connections or schematic

I believe he means the HP 3783A in the Subject Rob K -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dr Bruce Griffiths Sent: 28 October 2006 23:46 To: Eric Haskell; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] looking

Re: [time-nuts] Halloween

Back to good ol' UTC here in the UK this morning!! -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill Hawkins Sent: 29 October 2006 05:42 To: Discussion of precise time and frequency measurement Subject: [time-nuts] Halloween Stumbled on the Rocky

Re: [time-nuts] Rubidium Cesium video

Hadn't seen this before. Great stuff!! Presenter is Richard Hammond affectionately known by associates as The Hamster because of his diminutive size. Just out of hospital after crashing a jet powered car at 300+ MPH while filming BBC TV's Top Gear (compulsive viewing and hugely popular programme

Re: [time-nuts] Rubidium Cesium video

Forgot to mention that Brainiacs was a fun science programme for kids that went out a couple of years back in the UK. Rob K -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Van Baak Sent: 29 October 2006 06:19 To: Discussion of precise time and

Re: [time-nuts] Rubidium Cesium video

Harmless when you use the right isotope!! Rob K -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Forbes Sent: 29 October 2006 07:14 To: time-nuts@febo.com Subject: Re: [time-nuts] Rubidium Cesium video At 11:18 PM -0700 10/28/06, Tom Van Baak

Re: [time-nuts] GPS vagaries and binary interface

Didier Juges wrote: Dr Bruce Griffiths wrote: Didier Alternative GPSDO solution Divide the 10MHz reference by 32 resync the output to 10MHz with a fast D flipflop and then divide the D flipflop output by 4 using a 2 bit switchtail ring (Johnson) counter. Low pass filter the outputs

Re: [time-nuts] GPS vagaries and binary interface

Didier Juges wrote: Dr Bruce Griffiths wrote: Didier Juges wrote: That's the impression I am getting. I do not know if any of the GPSDO that I have seen described in recent literature take care of this properly. It seems when the GPS goes nuts, the 1 PPS goes quite a bit

Re: [time-nuts] Halloween

Rob Kimberley wrote: Back to good ol' UTC here in the UK this morning!! -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill Hawkins Sent: 29 October 2006 05:42 To: Discussion of precise time and frequency measurement Subject: [time-nuts]

Re: [time-nuts] Allan Deviation - more data: GPS1PPS against OCXO/128

Bruce, If GPSDO did some statistical filtering instead of just blindly accepting all PPS signals as valid and usable such dropouts would cease to be much of a problem. There's no substitute for a a correctly engineered design with an appropriate tracking loop bandwidth and statistical

Re: [time-nuts] More Allan deviation data

Hi Didier, you may use the DRIFT section of the graphic editor of PLOTTER to remove a phase drift due to a constant frequency offset as seen in this data, with the result that you get more visual resolution out of it, as in the attached PDF. 73 de Ulrich, DF6JB -Ursprüngliche

Re: [time-nuts] More Allan deviation data

I had to stack up frequency counters on top of frequency counters (to measure time difference and each input frequency simultaneously - 3 counters) and the last one on the top, a HP 5334B, was fairly high and just about level with the antenna, about 2 feet away. I found out that if I stood in

Re: [time-nuts] Rubidium Cesium video

From: Rob Kimberley [EMAIL PROTECTED] Subject: Re: [time-nuts] Rubidium Cesium video Date: Sun, 29 Oct 2006 07:59:04 - Message-ID: ![EMAIL PROTECTED] Harmless when you use the right isotope!! Not entierly. You end up with quite strong base which can cause you severe burns. Toss a piece of

Re: [time-nuts] Rubidium Cesium video

--- Tom Van Baak [EMAIL PROTECTED] wrote: For those of you who are both chemists and time nuts, here's an amazing video about rubidium and cesium... http://video.google.com/videoplay?docid=-2134266654801392897 Very impressive. Though I read a story somewhere that they faked the results

Re: [time-nuts] Rubidium Cesium video

One word: Cool!! John Tom Van Baak said the following on 10/29/2006 01:18 AM: For those of you who are both chemists and time nuts, here's an amazing video about rubidium and cesium... http://video.google.com/videoplay?docid=-2134266654801392897 Do any of the UK readers know

Re: [time-nuts] GPS vagaries and binary interface

Didier Juges wrote: Dr Bruce Griffiths wrote: Didier Alternative GPSDO solution Divide the 10MHz reference by 32 resync the output to 10MHz with a fast D flipflop and then divide the D flipflop output by 4 using a 2 bit switchtail ring (Johnson) counter. Low pass filter the outputs

Re: [time-nuts] Allan Deviation - more data: GPS1PPS against OCXO/128

Ulrich Bangert wrote: Bruce, If GPSDO did some statistical filtering instead of just blindly accepting all PPS signals as valid and usable such dropouts would cease to be much of a problem. There's no substitute for a a correctly engineered design with an appropriate tracking loop

Re: [time-nuts] looking for HP 3738A external pin connections or schematic

I was talking about a HP 3738A which is a YIG LO module for a HP 3730A down converter. However, I apologize, the post is was topic. I meant to post to the Microwave mailing list and was not paying attention. Eric Haskell KC4YOE - Original Message - From: Dr Bruce Griffiths [EMAIL

Re: [time-nuts] More Allan deviation data

Ulrich Bangert wrote: Hi Didier, you may use the DRIFT section of the graphic editor of PLOTTER to remove a phase drift due to a constant frequency offset as seen in this data, with the result that you get more visual resolution out of it, as in the attached PDF. 73 de Ulrich, DF6JB

[time-nuts] Programmable delay 1 ns - 1 msec for sale

I noticed the top item here, in case anybody is interested: http://www.testequipmentcanada.com/new20060705.html W2791 BERKELEY NUCLEONICS 7065-2 MISCDIGITAL DELAY GENERATOR PROGRAMMABLE DELAY OF 1 NANOSEC TO 999.999 MICROSEC 19 5 21

Re: [time-nuts] Rubidium Cesium video

Rasputin Novgorod wrote: --- Tom Van Baak [EMAIL PROTECTED] wrote: For those of you who are both chemists and time nuts, here's an amazing video about rubidium and cesium... http://video.google.com/videoplay?docid=-2134266654801392897 Very impressive. Though I read a story

Re: [time-nuts] Rubidium Cesium video

In message [EMAIL PROTECTED], Gary Chatters writes: For those of you who are both chemists and time nuts, here's an amazing video about rubidium and cesium... http://video.google.com/videoplay?docid=-2134266654801392897 Very impressive. Though I read a story somewhere that they faked the

Re: [time-nuts] More Allan deviation data

Didier, (even the menu now has a *normal* File-Open :-) you take the credit for this! 73 de Ulrich, DF6JB -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Didier Juges Gesendet: Sonntag, 29. Oktober 2006 15:22 An: Discussion of precise

Re: [time-nuts] Allan Deviation - moredata: GPS1PPS against OCXO/128

Hi Bruce, I read your paper in the AMSAT Journal and believe that an English translation of this would be very informative to those who cant read German. Please allow me to ask: Did you get it from my homepage or did you have a printed version of it?? Best regards Ulrich Bangert

Re: [time-nuts] Programmable delay 1 ns - 1 msec for sale

Please see their home page. W.J. Ford closed for business on Oct First. There is a link to an auction outfit. Bill Hawkins -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Poul-Henning Kamp Sent: Sunday, October 29, 2006 12:50 PM To: time-nuts@febo.com

Re: [time-nuts] Allan Deviation - moredata: GPS1PPS against OCXO/128

Ulrich Bangert wrote: Hi Bruce, I read your paper in the AMSAT Journal and believe that an English translation of this would be very informative to those who cant read German. Please allow me to ask: Did you get it from my homepage or did you have a printed version of it??