This circuit was found in a 90s RF Design. It is an oscillator that can reach 800 MHz, with the frequency controlled by an input voltage.
Found in a 90’s 73 magazine for radio amateurs, this circuit provides a few milliamps of output...
The S-meter is signal strength meter, coupled to telecommunications receivers to indicate the...
This circuit of the 1970s uses Germanium transistors. Changes can be made to use silicon...