simple short wave receiver

7-34 — elektor July/august 1981 simple shor3 The detector is able to cope with relatively strong input signals, as it is an infinite impedance detector. This also means that distortion is low, even with a heavily modulated (AM) carrier. The following specifications were obtained for the prototype: single sensitivity (AM mod. 30%, S/N = 10 dB): 1 pV single signal sensitivity (SSB, S/N = 10 dB): 0.3 AV frequency range with a 500 p tuning capacitor: 4.4 ... 17 MHz. lin HE Gain * IN 8.85 t-wave receiver The term single signal sensitivity may need some explanation. It is the figure obtained by measuring the sensitivity with the aid of a signal generator in the absence of all other signals. Due to input over- signals, the full benefit of this sensitivity will never be obtained, except perhaps in countries like Australia, where the spectrum is not yet polluted by OTHR"s and BC jammers. In the product detector mode, the suppression of AM will be in the order of between 40 and 60 dB, dep...