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Category Archives :Radio knowledge

How to transmit long distance for UHF and VHF ?

As we all know, the transmission distance of VHF and UHF signals is very limited in normal, but under certain conditions, long-distance or even ultra-long-distance transmission can also be achieved.  ...

Read more  VHF&UHF long-distance transmission,  Amateur radio

Getting to know Bluetooth

Bluetooth is a wireless technology, In recent years, Bluetooth technology has been used on wireless two way radios. Such as on Ailunce HD1, you can connect a Bluetooth adapter. another example, on Retevis RT78, it can be program on APP via Bluetooth.  ...

Read more  Bluetooth technology

How do I start with Amateur Radio Satellites

"Connecting amateur satellites" is a topic that many people think is particularly profound, and some people even flinch directly. Is connecting amateur satellite really so advanced? Today, we will have a brief understanding of amateur satellite through a few questions and answers.  ...

Read more  Amateur Satellites

Several Common Short-Wave Antennas Used in Amateur Radio

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.  ...

Read more  Common Short-Wave Antennas

The basic terminology of DMR Radio

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.  ...

Read more  DMR terminology,  DMR Terms,  DMR Radio Settings

What's WSJT

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.  ...

Read more  WSJT&WSJT-X,  FT8,  JT4G

Do you really understand FM?

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  ...

Read more  WFM,  NFM

What is the DMR Radio Zone?

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

Read more  Radio Zone,  All Channels

What's explosion-proof walkie-talkies?

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

Read more  explosion-proof walkie talkie,  Retevis RT56