Tag Archives :N

The history of the global amateur radio competition has been nearly 100 years, and it has almost accompanied the development history of the entire amateur radio DX communication.  ...

Are you looking for a DMR mobile radio that could easily fit on your vehicle’s dashboard. Yes, here it is. Retevis RT73 which is the perfect size you are looking for. It has all the bells and whistles you wanted from frequency range, GPS, build quality and most of all SIZE.  ...

As the most important receiving component of GPS module, GPS antenna is the main window of GPS to the outside world. Speaking of GPS antennas, we have to mention the active and passive antennas we often talk about. Do you know the difference of them? let's learn more together.  ...

A link budget is usually used to estimate the longest distance for a signal to travel between transmitter and receiver. This is also the main method for evaluating the coverage range of a wireless communication system and is an important work in wireless network planning. So how to make a simple link budget?  ...

After we complete , it needs to be debugged. The purpose of antenna debugging is to make the antenna system resonate at the transceiver frequency by trimming the length of the antenna element. Match the impedance of the antenna system with the transceiver impedance of the radio. Debugging generally uses standing wave meter, power meter or antenna analyzer.  ...

Retevis RT44 with GoHeart app is the ultimate outdoor networking device with a user-friendly interface that allows users to get help, track friends and talk to them without needing internet or telecommunication signal.  ...

No matter climbing, canyoning, country sports, cycling, ,wilderness-survival-bushcraft, extreme sports etc. communication is very important. Retevis according to the needs of outdoor enthusiasts design a outdoor communication tool RT44. It can meet all your outdoor needs.  ...

A repeater receives a signal on one frequency and simultaneously retransmits (repeats) it on another frequency. The frequency it receives on is called the input frequency, and the frequency it transmits on is called the output frequency.   ...

Let's talk about another important concept of the antenna: polarization.  ...

Why is your signal report of 50W radio not as good as the one just 5W radio? That's because in addition to the environmental loss, the power of the radio has a lot of loss in the antenna system. So many hams like to install them antenna outdoor to reduce antenna system loss. But what do you need to know when installing an outdoor antenna?  ...