W2ETI Frequency Reference

If you have one watch, you know what time it is.  If you have two that disagree, you can't be sure.  So with watches, so with frequency standards, which are really just very good watches.  I put together a triple standard to always be sure: 

 Behind this unassuming panel is one of each.  If the GPS and Rb disagree, the quartz can decide which is right.

Why no detailed internal photos?

I forgot.

Next time I take it out of the rack I'll take some and add them here.  Meanwhile, visualize whirling satellites and tiny quantum mechanics vibrating those atoms!