Figure 1 Slope detection method where a bandpass slope below the resonant peak is used to create a slope-induced amplitude modulation where a simple envelope detector can be used to recover the ...

Signal generation duties could easily be handled by a 555 circuit at the low end, and a computer sound card at the higher end. [brmarcum] obviously put some time into his tutorial, but it’s not ...

Veronica 1W FM transmitter is easy to build and to operate in FM. Veronica is also known for frequency stability, clean fm signal and uses no integrated circuit. You may want to check this another 1W ...

AM radios were easy to understand. The strength of the signal goes up and down, and the audio follows. FM radio is a little more difficult. [AllAmericanFiveRadio] has an old tube FM set and takes u… ...