Fred Jensen wrote: > I volunteer at the local blood bank and recording times is important to > the documentation of the process. Consequently, they installed "atomic > clocks", our little center has 5 of them, not all the same mfr, > scattered around to be visible to the staff. I've watched them differ > by more than 90 seconds at times, and rarely are any two of them in sync.
I run six WWVB-controlled clocks here in north Alabama. I have never observed any variance between their indicated times, nor with them in comparison to WWV's voice signal, except that sometimes the automatic transition between standard and daylight savings time occurs one day late on some models. The WWVB signal comes in strongly here, and can be easily heard even on my old TS-50S that has been modified to tune that low. Phil Kane wrote: > If my present analog "ship radio room" quartz clock dies, I may > reconsider it. Is your "radio room" clock actually a product designed for that role in the old part 81 Maritime Morse station service? I've never seen one of those with a quartz movement. I have two Seth Thomas WWII Maritime Commission Radio Room Clocks (one from the Liberty ship SS Otis Skinner, struck by kamikaze attack 01/12/1945), and one made by Chelsea. These likely saw service on the Main Transmitter panel section of the 1943 RMCA 4U Radio Console that was standard on so many WWII Victory and Liberty ships. I've never seen any radio room clock that was more modern. Back to modern times...I wonder why the KX3 RT clock isn't one that is much more accurate over a long period of time than it is. I purchased a $15 Casio watch several months ago that gains only one second after 43 days! There was an element of luck getting one with such accurate rate, but when I think "real-time clock" in today's radio world, I expect something that is comparable to what the typical dirt-cheap quartz wrist watch can produce, with reasonably constant and small drift measured in seconds from week to week, not minutes. Mike / KK5F ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
