Enter the oven controlled crystal oscillator, or OCXO. These do basically what it says on the tin, but what’s inside them? [Kerry Wong] took apart a vintage Toyocom TCO-627VC 10 MHz OCXO ...

We are looking forward to part two, where he actually converts the GPS-discipline oscillator to use the new atomic clock. We’ve seen this done before, of course. Cesium is even more precise ...