A simple indicator of the level of the signal on AN6884
A simple signal strength indicator is presented below:The circuit operates over a wide supply voltage range from 3 to 18...
Laboratory transformer
The described design can serve as an alternative laboratory the autotransformers (Latr), widely used in Amateur radio practice. In addition,...
Low-noise antenna amplifier 23 channel UHF
The amplification of 18 and 21 dB for voltage. Mounted on the mast near the antenna. Two outputs on coaxial...
Fully Adjustable Power Supply
Based on a National Semiconductor application note, this circuit uses an LM317 3-terminal regulator (REG1), chosen because of its built-in...
Module filters for suppression of acoustic feedback
In the article the author suggests a simple block of notch filters designed to work as part of a modular...

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