Shortwave radio broadcasts between 3 and 30 MHz (3,000 kHz to 30,000 kHz), and signals can be heard across long distances. They were frequently used during World War II, usually transmitting coded messages.
First introduced in the 1920s, shortwave broadcasts revolutionized the world of radio, making international broadcasting and international communication possible. Shortwave broadcasts work in conjuncture with the ionosphere... the frequencies fall into the ionosphere and bounce back, broadcasting across the globe.
Although radios that pick up shortwave broadcasts can still be bought today, vintage shortwave radios are a fun (and useful!) collectible.
Best of the Web (“Hall of Fame”)
Jim's Antique Radio Museum
The Radio Attic's Archives
Phil's Old Radios
Clubs & Associations
- Antique Wireless Association
- Southeastern Antique Radio Society
- New Jersey Antique Radio Club
- British Vintage Wireless Society
- California Historical Radio Society