RF experimenter's circuit. Radio crystal goes where AC source is located and 50 ohm resistor on right is dummy load. The 1nf capacitor is a variable capacitor. The SPST at bottom is Morse Code Key.
Harmonics may clutter up other frequencies so filters may be needed.
Transistor is 2N3053 but other substitutions suggested on Internet information:
https://makerf.com/posts/ten-minute-transmitter
