Electronic detection has been one of the most useful tools in the area of UFO detection. There are actually several UFO detectors on the market that claim various degrees of accuracy. I do not know where they get their data on this. I have been collecting and trying different approaches to detection and found some success with the radio band as a good tool that most people can afford to replicate. An electronically minded person could use easy to make circuits that will monitor the VLF (very low frequencies) portion of the rf spectrum to detect a wide variety of atmospheric disturbances. Magnetic fields cause a static that travels through the air as radio frequencies to a special receiver. I find that a white noise or whistler receiver can catch very unusual sounds in the very low frequency range from just a few Hertz or cycles per second to perhaps 16k (thousand) Hertz per second. This is where much of the electro-magnetic energy is transmitted. You do not have to know electronics to make some of the detectors we are about to discuss here. Most everyone knows of someone who even dabbles as a hobbyist that could assist you in the manufacture of the devices. Parts List: Transistors C2 -- 5 Q1-Q2 SK3004 C3, C4 -- 0.02 Resistors (ohms) Miscellaneous R1 -- 430 Loop Antenna -- 200 turns of #25 R2 -- 10k enameled wire in square loop on R3 -- 330k wooden frame. See text for details R4 -- 6.2K Switch -- optional on either side of battery. Capacitors (uF) 9 volt battery C1 -- 10 RCA Jack to output to stereo (optional) The antenna is 200 turns of # 25 enameled wire rapped in a square over two 48 inch pieces of wood nailed together in an "X" shape. You can run any type of wire from the antenna to the receiver. Lamp cord from a hardware store or speaker wire works well. Mount the loop on a pole that can be rotated. Plug the receiver into a stereo amplifier and listen. If you are somewhat near any power lines, you will have to rotate until the Hum goes to its' lowest volume. You should then be picking up different pops and crackles. At different times of day there are different sounds produced do to a multitude of atmospheric conditions. Get used to the different noises that are common. You will be looking for any unusual sounds. Look outside if you do. It may be a UFO! If you hear Morse code, the Navy may still be using a 2 million watt transmitter located in Maine that transmits at 14.8kHz.