Posted to diyPhysics.com: d.i.y. 10 MHz Atomic Clock Frequency Standard Using Surplus Rubidium Oscillator

I just posted on www.diyPhysics.com  about my 10 MHz rubidium standard based on a surplus Efratom M-100.  It is a free-standing 10 MHz +/-5×10-11 frequency standard for frequency counters, as well as a precise calibration source. I use it to keep precise track of frequency when working on Earth-Moon-Earth (EME) communications, where even tiny errors in tuning can make the difference between success and failure to receive weak echoes.

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