Before revision: Since the length of the waves used with crystal radios is very long (AM broadcast band waves are 182–566 m or 597–1857 ft. long) the antenna is made as long as possible, from a long wire, in contrast to the whip antennas or ferrite loopstick antennas used in modern radios.
After revision: Since the length of the waves used with crystal radios is very long (AM broadcast band waves are long) the antenna is made as long as possible, from a long wire, in contrast to the whip antennas or ferrite loopstick antennas used in modern radios.