Efratom M-100 : First View and Test

 What are we talking about? Today I’ll talk about this magnificent little device found on eBay : the  Efratom M-100.First of all, what is a Rubidium Frequency Standard?  It’s an atomic clock.Just in the 80-90 they were such  an expansive units! The working mechanism is fascinating. It uses the hyperfine transition of electrons in rubidium-87 atoms […]