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Category Archives :Radio knowledge

Basic Knowledge about Radio Repeater

Getting started with radio repeaters basic knowledges. What is a repeater? What is downlink and unplink? What is offset?  ...

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How to estimate the repeater communication distance

For radio system, the repeater( relay station) plays on important role in extending the communication range and coverage. The indispensable equipment for wireless communication system. For the communication range of repeater, we usually get it from two ways  ...

Read more  Repeater,  Distance

Common Types of Short-wave Antennas

The commonly used short-wave antennas are mainly classified into three categories, the vertical antenna (GP), the dipole antenna (DP), and the Yagi antenna (YAGI). In addition, there are frame type, diamond type, dish type, etc. Here we mainly discuss the first three types of antennas, among which the focus is on dipole antenna and its deformation.  ...

Read more  Antenna,  HF

What is the Balun

Balun, the full name is "balance to unbalance transformer". A balun is an electrical device that converts between a balanced signal and an unbalanced signal. Its essence is a transformer. Whose role in the circuit is to convert and match "an electrical signal that is relatively balanced with the reference ground" and "an electrical signal that is relatively unbalanced with the reference ground".  ...

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Why you need a DMR Hotspot

A hotspot is simply an internet gateway to a particular DMR network (Brandmeister/TGIF). DMR Hotspots have become very popular due to the expansion of the Brandmeister Network in recent years.  ...

Read more  MMDVM hotspot,  DMR hotspot

Why Can not I Access the Repeater

One question we often hear from new hams (and maybe some not-so-new hams) is "why can't I get into the repeater?" There are many reasons why you can't get into a repeater so it is difficult to come up with a quick fix for all situations.  ...

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Basic Introduction for Analog (FM) Repeaters

Repeater, as the name implies, an FM repeater repeats your radio signal. It is just an amateur radio station that has been designed for the special purpose of retransmitting your signal instantaneously as it is received.  ...

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The Differences Between Walkie Talkies and Two Way Radios

The terms "two-way radio" and "walkie talkie" are often used interchangeably. Both are capable of sending and receiving radio transmissions. So what's the difference? It's mostly nothing to do with the radios themselves, just the way that different types of user refer to them.  ...

Read more  Walkie Talkie,  Two Way Radio

Text messaging on two way radios

One of the most useful features of modern digital two way radios is text messaging. This capability allows users to send texts via keypads on their radios and read them on their LCD displays.  ...

Read more  Radio Message

The Meaning of The Amateur Radio Callsign

Every HAM with a radio license has a callsign. The callsign is the code name of the HAM, it is used to identify a person (HAM).  ...

Read more  Callsign