[Michael Rainey, AA1TJ] never quite forgot it. Back in 2009, he built “El Silbo”, a ham radio transmitter powered entirely by his voice. El Silbo is a Double Side Band (DSB) transmitter for 75 ...

We’ve said it before and we’ll say it again: the best part about holding an amateur radio ... power transmitter for the 80-meter band is something you don’t see every day. As ham [Helge ...