Bruce, what was the diameter or how was the column situated to give those resolutions.
----- Original Message ----- From: "Bruce Griffiths" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" <[email protected]> Sent: Wednesday, August 20, 2008 6:19 AM Subject: Re: [time-nuts] Restoring GR 1120-AB Frequency Standard > phil wrote: >> Russ >> Do you have a photo, would it be possible to build? I have a few flasks >> of >> mercury and a few 10's of thousands of mercury wetted relays that some >> could >> be cannibalized for electrodes. The trick here is how thin is that column >> of >> mercury. My guess the thinner the column, the finer the resolution or the >> more it will travel with a small temp swing. Better yet, possible to cut >> that thing open and fix it. >> I know that's more time than it's worth. >> >> Another thought, if the contacts have corroded in the mercury, perhaps >> from >> contamination, would it be possible to "burn" the contamination off. >> Thinking of excessive voltage/current. Perhaps making it arc internally. >> Trick would be to limit current not to explode the thing, perhaps using a >> charged capacitor. Just a thought. >> >> Oh, do you have the whole rack, all dividers and the clock? I bet the old >> clock alone is worth a thousand bucks today. Seems like it was driven by >> 1 >> KC. My old standard was complete, a 5 or 6 foot rack and came out of an >> old >> Hamerland Radio plant. >> >> phil >> >> >> > Phil > > NBS used platinum wires in their mercury toluene thermoregulators. > These were constructed from pyrex as it proved more stable than > stainless steel. > These themoregulators had a sensitivity of about 0.001C and were used to > regulate the temperature of oil baths, > > Bruce > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
