Found in American documentation from the 1980s, this circuit operates in the frequency range 0.5 to 20 MHz. The power can be between 5 and 15 V.
Found in a 90s magazine for radio amateurs, this circuit can generate frequencies up to 45 MHz...
This circuit is intended for the production of an audible signal from the capture of a continuous...
Found in a 1968 EEE, this switch controls a high-power load from an audio signal. The current is...