Astronomers, using a simple radio antenna in Australia, detected a signal at 78 MHz, interpreted as the absorption of background radiation by hydrogen gas ionized by the universe's first stars, ...

The University of Kent’s hackerspace, TinkerSoc, recently had a talk on software-defined radio using an incredibly inexpensive USB TV tuner. Of course this is nothing new to Hackaday readers, but they ...

When temps start to rise, and everyone wants to have fun in the sun, owning a boat can be a great way to cool off and enjoy an adventure with family and friends. You can get a great deal, especially ...

A tiny signal, dating back to the birth of the first stars in our universe, has been detected by astronomers for the first time. Astronomers detected a miniscule radio signal that indirectly indicates ...

The basic design of the radio antenna hasn’t changed in a century. The antenna is usually a set of metal rods roughly half the size of the wavelength they are designed to receive. The electric field ...

Sometimes, it is useful to transmit a low-power radio signal to create a beacon, to send a signal carrier to a near receiver, to transmit in QRP or QRPP mode, and so on. The circuit shown here is very ...

A new simpler, cheaper and potentially more effective way to prevent radio antennas from picking up unwanted signals has been created by researchers in the US. With further development, the technique ...

"Whip" antennas—those long metal rods that used to extend from our cars—look pretty cool in a Smokey and the Bandit kind of way. But for military vehicles, they're not such a great solution. Troops in ...

[Bill Meara] has finished his latest project, a Moxon antenna for HF on 17 meters. [Bill] is well-known here on Hackaday. When not building awesome radios, he can be found ranting about ham radio. His ...