For those with a deeper interest: Once while vacationing in Oregon I heard a broadcast from Radio Australia about a radio operator on a naval ship who learned to recognize the "fist" or touch of wireless operators from other ships before he heard their call signs. When WW II was about to break out the German radiomen ceased using their call signs to hide the identity of their ships and their location, but he knew each one from his distinctive "fist" on the Morse code key. The radio signals also modulated in a distinctive way when a ship was transmitting from one particular area. Not only could he identify the German ships from the way the radiomen tapped out their Morse code, but he also knew exactly where some of the ships were located at the time. This is just an example of things you can hear on shortwave broadcasts.
Step 1: Not as popular as before
Pictured is the Passport to World Band Radio. A new edition is published each year. It is a yellow pages guide to international broadcasts.
Unfortunately, shortwave broadcasts are not as available as a couple of decades ago. This is due to budget cuts and the Internet. Now you can download Podcasts from many national broadcasters. These Podcasts are in FM quality and without the static interferences associated with shortwave broadcasts. Still, there is a certain romance from listening to a radio signal from the other side of the globe.
Step 2: Open your radio
Step 3: Magnet wire
Step 4: Loosely wrap seven turns of wire
Step 5: The circuit
It is possible that a radio you have will not work with this conversion. I have just such a radio, but have also successfully converted several other radios.
Reception is generally limited to hours of darkness. Evening will be the best time. Tuning can be difficult. Stations may be no more than a blip on the dial, requiring a constant gentle pressure from one side or the other on the knob or wheel to hear the broadcast. A smaller radio may require earphones in order to hear. A boom box will be easier to tune and to hear without an earphone.
I knew a Chinese couple and offered to convert their boom box's AM band for shortwave. I finished the project and gave it back to them four days before the massacre at Tiannamen Square happened. Every evening after they closed their business they were glued to their radio. Radio Taiwan gave accurate reporting. Radio Bejing glossed over the story and played classical music. Both had relatives in Bejing (Peking). Not only had I experienced a success with the conversion, but I helped out this couple and they were very appreciative.