Suggested by a 1965 Electronic Design, this circuit has a gain of 15 dB at 45 MHz and can be changed to operate on other frequencies. The tetrode FET is an uncommon component today.
The two amplifiers are practically the same, except for the gain. They have the following...
We found this circuit in the October 1992 Radio Electronics magazine. The frequency is given by C1...
This circuit allows you to superimpose the signal from the microphone to that of the music with...