We found this circuit that can reach 50 MHz in the February 1997 Electronics Now magazine. The integrated circuits used are not very common today.
This circuit was found in General Electric documentation from 1964. It makes use of a PUT, called the...
The circuit presented is suggested by National Semiconductor in its Linear Applications Handbook. The...
This is a small transistor receiver for the medium wave range made in Japan in the 1960s. The...