Dhalgreen440 shows us some very impressive restorations of WW2 radio gear including many of the auto-tune systems, where servo motors would automatically tune the transmitter or receiver (or both ...

[Robert Sumption] a.k.a [W9RAS] takes on the daunting challenge of building a WWII spy radio called the Paraset ... a tube based CW (Morse code) transmitter/receiver used by the French underground ...

Voyager 1 is now using a radio transmitter it hasn’t relied on since 1981 to stay in contact with its team on Earth while ...