Category Archives :Radio knowledge

There are many types of short-wave antennas, both finished and self-made, and the prices vary widely, ranging from hundreds to tens of thousands.  ...

Nowadays,DMR radios become very popular not only in amateur market but also business market. But There are various terms more specific to DMR that could cause some confusion.  ...

WSJT is a computer program designed to perform basic amateur radio communications with very weak signals. JT4G, ECHO and FT8 are series of WSJT. Today we'll learn more about WSJT.  ...

NFM is a narrowband frequency modulation method, which is suitable for communication signals with a channel bandwidth of 25kHz / 12.5kHz; WFM is a wideband frequency modulation method, which is suitable for receiving broadcast signals with a channel bandwidth of about 180kHz  ...

Zones are just a way to manage large number of channels, much like file folders or directories on your computer.  ...

Do you know explosion-proof walkie talkie? Today, I'll share something related to you in the blog.  ...

Is there any body listing to the radio broadcast now? whether radio broadcast is going to fade away? In my opinion, the radio broadcast will not going away. It may be integrated into the cell phone, or it can exist in other ways.  ...

A Mexico City subway station boasts a hidden museum, complete with a working radio booth.  ...

Why does the walkie-talkie have a long external antenna, and most of the mobile phones are built-in antennas?  ...

The application of walkie-talkies in the field of emergency rescue is becoming more and more mature. For rescue fighters, walkie-talkies are not only a communication tool for them to keep in touch with the team, but also an important equipment for escorting them at critical moments.  ...