This looks like a fun old-school build. The Michigan Mighty Mite. It’s a shortwave transmitter, has an antique vibe to it. Defiantly something to build if you are getting into RF or wanting to learn more about RF.
The only part you probably don’t have is a variable capacitor, however the article does state you can just keep piecing together regular caps until you are happy with the rf output. Oh and you’ll have to wind your own coil :)