[Willem Koopman aka Secretbatcave] was looking at a master clock he has in his collection ... Now, since most time keeping devices utilise a crystal oscillator — which is little more than ...

[Q26] decided to use the ProgRock2 “programmable crystal” to build a receiver that could tune multiple frequencies without the usual traditional tuning circuitry. The ProgRock2 is designed ...

The newest Astron references run on Seiko’s 5X83 solar-powered, satellite-linked quartz movement. It is the latest in an evolution of electronic movements dating back to the original Astron, Seiko’s ...