The World’s Smallest Ham Radio Can Fit on a Keychain

Since the advent of e-mail, the internet, and text messaging, the need for amateur radio communication has definitely diminished. But there’s still a small but dedicated group of enthusiasts out there who enjoy communicating via amateur radio, also known as “Ham radio.” Most ham radio transmitters are at least the size of a lunch box, and in some cases the size of a desktop computer. But this ham radio transmitter is small enough to carry in your pocket.

Measuring just 1″ x 1″ x 0.75″, the KeychainQRP won’t transmit your voice or music, but it can send morse code signals using low-power, high-frequency radio waves when you tap on its top-mounted button. Assuming your message recipient has access to a compatible multi-band shortwave radio, they can listen to your transmissions if they’re close enough. The tiny transmitter comes in seven different amateur radio bands, and can produce a 160 milliwatt signal on a single 9-volt battery. You’ll need to attach an external SMA antenna if you want your signal to go anywhere though, and also need a ham radio operators license if you want to use one legally.

You can find all of the different frequency models of the KeychainQRP morse code transmitter for $51.99 each over on the QuirkyQRP Ham Radio shop.

Denon rolls out the first 8K-ready receivers with its 2020 X-Series

While the debates rage on over whether or not anyone needs 8K, the new line of Denon receivers are ready for higher resolution video when and if you decide to make an upgrade. Perhaps more importantly, they also support HDMI 2.1, including features l...

Pioneer’s in-dash unit supports both Android Auto Wireless and CarPlay

Android Auto Wireless promises to make vehicle smartphone connections less of a futz, provided you have both a phone and infotainment system that supports it. Google is handling the first part, and Pioneer just announced that it has joined JVCKenwood...

Wirecutter’s best deals: Save $90 on a Microsoft Xbox One X console

This post was done in partnership with Wirecutter. When readers choose to buy Wirecutter's independently chosen editorial picks, it may earn affiliate commissions that support its work. Read their continuously updated list of deals here.