Time-Nuts

Time-Nuts is a specialized mailing list hosted at LeapSecond.com, aimed at amateurs who care about precise time and frequency. Rather than a conventional website with articles or tools, it functions as a discussion hub where hobbyists exchange practical knowledge about oscillators, atomic clocks, and time-transfer techniques.

The topics are unusually specific: stability of quartz oscillators, measurements of rubidium and cesium atomic clocks, and long-term comparisons using WWVB, Loran-C, and GPS. Members also discuss acquiring, repairing, and operating surplus electronic instruments, along with homebrew hardware and software projects measured in nanoseconds and picoseconds.

Most participants are ham radio operators or electronics hobbyists, from newcomers with questions to experts who contribute deep measurement experience. The list has around 1,800 members, so traffic can be substantial and threads technical.

Joining is deliberately simple: send a blank email to the join address, reply to the confirmation that arrives within seconds, and you can post. Unsubscribing uses a separate blank-email address, and administrative questions go to the owner address rather than the public list. Read the subscription notes before posting, since you must subscribe before your first message.