This circuit was found in the February 1994 issue of Electronics Now magazine. The circuit uses 6 and 12 V regulators that must be equipped with heat sinks. The current is 1A (max).
This oscillator has its frequency controlled by crystal and its frequency can be between 100 kHz...
This small crystal microphone transmitter was indicated in an 80s spy book. The range depends on...
The circuit shown is from the 1994 Linear Applications Handbook by National Semiconductor. The...