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Volumes

1. Vol 1 Building Your Own Keys — Vol 1: A Key from Almost Nothing A Morse key is the most buildable instrument in radio — a lever, a contact, a spring, and a base. Here is how to make one from a hacksaw blade or a block of brass, and the handful of choices that decide whether it feels good.
2. Vol 2 Building Your Own Keys — Vol 2: From a Hex Paddle to a Talking OLED Homebrew paddles, pairing a hand-made key with a keyer chip or a microcontroller, and building the practice gear — including a little display that listens to Morse and reads it back to you.