Circuit diagrams for radio amateurs

A simple signal strength indicator is presented below:The circuit operates over a wide supply voltage range from 3 to 18...

The described design can serve as an alternative laboratory the autotransformers (Latr), widely used in Amateur radio practice. In addition,...

The amplification of 18 and 21 dB for voltage. Mounted on the mast near the antenna. Two outputs on coaxial...

Based on a National Semiconductor application note, this circuit uses an LM317 3-terminal regulator (REG1), chosen because of its built-in...

In the article the author suggests a simple block of notch filters designed to work as part of a modular...