On 11/28/2014 1:25 PM, dave wrote: > At one time I used a cesium standard to troubleshoot a timing issue when > clocking the phone network. I think it, in its shipping container, > weighed about 75#. The container probably weighed less than 15#. A > cesium standard is fairly heavy. We had to lug it up to the 3rd floor of > one central office.
Fifty years ago I was a (junior) project engineer on the US Air Force's first computerized digital message switching system. Each of our switches used rubidium standards made by National Radio (the same folks who made the HRO line of receivers). They took up two full relay racks each, Times have changed! 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 >From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
