I found this circuit in a documentation for radio amateurs from 1975. The FET could be the BF245. The circuit works in the range of 40, 80 and 160 meters of radio amateurs.
We found this circuit in a magazine 73 from the 90's. It is a circuit indicated for radio-amateur...
In the figure we have a 9V source using a 5V 7805 regulator. The circuit is from an American...
If you have an old cassette player or bought one from a junk shop, you can set up a small table...