Calculators

Interactive tools for working out real gear tradeoffs — weight, operating time, range — instead of another static post about it. All of these are work in progress — I’m actively checking and refining the numbers behind them. Where I don’t have real data yet, the tool says so instead of guessing.

• Portable Ham Radio Pack Calculator — pick a radio, antenna, battery, and bag; get real weight, operating-time, and per-band range estimates.