The sound of scrubbing an am radio back and forth across the spectrum. There are bits and pieces of stations picked up, but it's mostly interference. Recorded using an old analogue radio, connected to a zoom h1 handy recorder.
Recording of the static noise of my babyphone. Recorded with zoom h1. Free to use, no credit needed. You can't let me know in the comments for what you have used it.
Different frequencies of sounds from the radio transmission in the basement carpark resembling that of an alien-ish futuristic noises. Recorded using edirol r-09, 15cm from speakers.
A testpicture which shows a greyscale in sstv using mode martin1. Sstv stands for "slow scan television". Sstv is a kind of modulation to send a frozen picture enclosed in a transmissionchannel normally used for speech. This allowes to send pictures directly, for instance, on shortwave.