They are not inexpensive. In Finland you need a Radio Operator Licence and pay some 20€ annually and also you have to pay for reprogramming the special "National ID". And thus this mostly useless device costs 400€: https://www.marnela.com/product/1304-01261
Some 40 years ago I made 2 Mhz emergency Morse transmitter from RCA Cosmac, because I planned to spend a summer on Antarctis. It worked quite well with long ass wire antenna. But they do not monitor that frequency anymore and nobody understands morse.
Some 40 years ago I made 2 Mhz emergency Morse transmitter from RCA Cosmac, because I planned to spend a summer on Antarctis. It worked quite well with long ass wire antenna. But they do not monitor that frequency anymore and nobody understands morse.