When we think of a spark gap radio transmitter, most of us immediately imagine an early twentieth century ship’s radio room or similar. Most of us know these transmitters as the first radio s… ...

A drone view of the RNZ Pacific shortwave site at Rangitaiki, New Zealand. (Photo courtesy Radio New Zealand.) While some international broadcasters are switching off their shortwave transmitters, ...

1 watt fm transmitter. A very good 1 watt fm transmitter circuit, very easy to build circuit. It has 4 transistors, one is a very stable oscillator, followed by a buffer stage to prevent frequency ...

Granted, 100 watts has nothing on 100,000 watts, the power rating common to most of WRMI’s 14 SW transmitters. To cover the world successfully by bouncing radio signals off the ionosphere, serious ...

This little transmitter looks like a ton of fun to build, and we may just try it for our $50 Ham series if we can find all the parts. Honestly, the hardest to come by might be the variable ...

Radio waves fill the space around us every second of the day. They emanate from local radio stations, mobile phones, short-wave radio transmitters around the world, and some even from satellites ...