You can see the results he gets using the setup as an AM radio receiver in the video after the break. He tested against a meter long antenna and found that his setup far outperforms it.

SIMPLE, EASY-TO-USE FM/AM RADIO WITH HIGH QUALITY SOUND: Portable handheld radio with digital tuner has a simple, easy-to-use interface, with antennas that pick up both AM and FM signals EASY-TO ...

A small box has a switch for three bands — LW, AM, and SW ... and a pigtail with another 1/8″ jack. If your radio takes a 1/8″ plug for an antenna, that’s where you connect it.