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How to upload 200.000 DMR contacts into Retevis RT73

Retevis RT73 as a dual band mini Mobile Radio supports 200.000 DMR Contacts. Today, let's we learn how to upload 200.000 DMR contacts into RT73.  ...

Read more  RT73 DMR contacts,  upload RT73 DMR contacts

How to program Retevis RT73 Mini Mobile Radio

RT73 as a dual band DMR mobile radio is very popular now. This is a undersized mobile radio than others in the market. It's an entire radio that's the size of a remote head. No need to mount a separate box, just the "head."  ...

Read more  Retevis RT73,  RT73 mobile radio

Retevis RT74 portable single frequency repeater

The RT74 portable single-frequency repeater recently is developed by Retevis is with the latest technology, the most stable components, the most advanced production technology. It is a lightweight, ultra-portable design, minimal installation DMR repeater.  ...

Read more  Retevis,  SFR,  Repeater

First time receive ARISS worldwide SSTV Image with AilunceHD1

we get a very imprssion experience how to receive SSTV image with AilunceHD1.  ...

Read more  SSTV IMAGE,  ARISS SATELITE,  ARISS worldwide SSTV event

Frequency Reverse function on AilunceHD1

Frequency reverse means reverse radio transmit frequency to receive frequency. and at the same time exchange the CTCSS tone.   ...

Read more  radio frequency reverse,,  reverse frequency

What's SDR radio?

In amateur radio world, one of ham's favorite radios is the SDR transceiver. So what's SDR radio? What is the difference between SDR and traditional transceiver ? what are advantages and disadvantage of SDR? Let's study together.  ...

Read more  AmateurRadio,  SDR Tranceiver

Common types of radio emissions

The specification of walkie-talkie is an important reference for us to know whether it meets our needs. For example, the working mode of walkie-talkies is often marked with words such as F3E or F2D. Do you know what it means? Today let's study together.  ...

Read more  Radio emissions,  ITU

The commonly used English abbreviations of CW

In order to improve communication quality and communication efficiency of CW, people have invented and used various abbreviations in long-term practice, which is to abbreviate frequently used words and sentences in communication to one or a few letters. It has evolved and perfected and formed the abbreviation that is now commonly used internationally. There are two common rules for commonly used English abbreviations.  ...

Read more  CW,  English abbreviations,  morse code

Four kinds of CW key

For CW morse key, now we most commonly use the double paddle automatic morse key. In fact, in addition to the automatic double paddle button, there are three types of morse keys including straight key, single paddle morse key and semi-automatic morse key.  ...

Read more  AmateurRadio,  CW key,  Bug key