2 безплатни аудиофайлове за "Ac Modulation"

Part of qso with i1ulj. He used home-brew tx - power only 3 watts. Good strength but ac modulation. My antenna low doublet 80 m. Recorded: nokia 6230i, trx loudspeaker - phone mic (ft-897, qth jn79nd).

Noise of a solar power dc-ac inverter on a sunny day. A static hum with some kind of a rhythmic modulation. Sometimes other noises like a bird singing outside, however mostly the pure sound of the inverter. Recorded x/y stereo with at4041 mics into a pmd661 recorder. Eqed in fabfilter, there used to be a sine beep at 15. 8khz, inaudible for many people but it would have been even more annoying for those who can still hear it.