Rubidium is an alkali metal in group IA of the periodic table with atomic number 37, an atomic weight of 85.47, and a density of 1.53 Mg/m 3. Its melting point is 38.9 C, and it boils at 688 C. The ...

[W3AXL] picked up a rubidium reference oscillator on eBay at ... where he actually converts the GPS-discipline oscillator to use the new atomic clock. We’ve seen this done before, of course.

He’s made a real-time-clock module controlled by a rubidium frequency standard ... but among them have been a few based upon atomic standards. More than one has been used as a lab reference ...