Re: [time-nuts] pneumatically synchronized clocks

Peter Galison wrote a fascinating book, "Einstein's Clocks, Poincare's Maps," in 2003, subtitled "Empires of Time." >From the bottom of page 92, "But if France could lock space and mass in the protected basement of Bretuil [kilogram and meter], time proved more elusive. At the beginning of the 18

Re: [time-nuts] About HP10544A

Bruce Griffiths wrote: > Esa Heikkinen wrote: > >> Hi Bruce... >> >> >> >>> Try increasing C2 and C8 in the white emitter follower circuit schematic >>> to 100nF. >>> >>> >> Doesn't seems to change anything: >> http://www.amigazone.fi/files/gpsdo/544-15.png >> http://www.amig

Re: [time-nuts] About HP10544A

Esa Heikkinen wrote: > Hi Bruce... > > >> Try increasing C2 and C8 in the white emitter follower circuit schematic >> to 100nF. >> > > Doesn't seems to change anything: > http://www.amigazone.fi/files/gpsdo/544-15.png > http://www.amigazone.fi/files/gpsdo/544-16.png > > When doing this meas

Re: [time-nuts] About HP10544A

Esa Heikkinen wrote: > Hi Bruce... > > >> Try increasing C2 and C8 in the white emitter follower circuit schematic >> to 100nF. >> > > Doesn't seems to change anything: > http://www.amigazone.fi/files/gpsdo/544-15.png > http://www.amigazone.fi/files/gpsdo/544-16.png > > When doing this meas

Re: [time-nuts] GPS disciplined mechanical clocks

Jim, Jim Palfreyman skrev: > Excellent. > > I shall get the observatory to move their hydrogen masers onto a board on > drink cans immediately. If you detune the Q value of them you can make it work. :) Cheers, Magnus - do notice the smiley, it's there for a reason > Jim > > 2009/3/10 Max Rob

Re: [time-nuts] pneumatically synchronized clocks

1pps = 1 puff per second? ___ 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] pneumatically synchronized clocks

Also it seems that there was at least one company making pneumatic master/slave clock systems for buildings. I've found references to these made by the Hahl company out of Chicago. Not sure if any of these are still in service anywhere. I know pneumatic building automation systems are still ac

Re: [time-nuts] About HP10544A

Hi Bruce... > Try increasing C2 and C8 in the white emitter follower circuit schematic > to 100nF. Doesn't seems to change anything: http://www.amigazone.fi/files/gpsdo/544-15.png http://www.amigazone.fi/files/gpsdo/544-16.png When doing this measurement I noticed that the 3rd and higher harmoni

Re: [time-nuts] pneumatically synchronized clocks

Bill, I did a bit of research and this is what I found: Between 1890 and 1930 in Paris, there was a plant that produced compressed air and managed a network to distribute it in the city. They used 4 coal heated steam engines (2000 HP each) to compress air to 6 bars and send it through 1000Km of

Re: [time-nuts] About HP10544A

Hello! > I am back home now and can't access the amigazone files from my home IP. > Can you provide access? You should now have access. -- 73s! Esa OH4KJU ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi

Re: [time-nuts] Thunderbolt performance vs temperature sensor

> Hello Said, > > Attached is a screen dump of a run that John Miles did. You can > see that the envelope of the DAC voltage follows the temperature > curve (inversely). On a finer scale the DAC voltage follows the > PPS error. This plot was done with the unit locked to GPS. I > believe the t