Dunfermline, United Kingdom
Obvious jamming is easy to detect because it can be heard on the receiving equipment. It usually is some type of noise such as stepped tones, random-keyed code, pulses, music (often distorted), erratically warbling tones, highly distorted speech, random noise and recorded sounds.
Pre-Signal Jam mixes are archived here: http://www.mixcloud.com/pkaulf
