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What's Selcall

Selcall is short for Selective calling. It is a type of squelch protocol used in radio communications systems, in which transmissions include a brief burst of sequential audio tones.  ...

Read more  Amateur radio,  Selcall

What's the UTM system?

UTM is short for Universal Transverse Mercator Grid System (UTM). that is said the universal transverse Mercator grid coordinate system, which is a flat rectangular coordinate.  ...

Read more  Amateur Radio,  UTM,  GPS system

How to do if Ailunce HD1 is killed by unknown person

We know, if we have two Ailunce HD1, we can kill and wake each other remotely, but how to wake up Ailunce HD1 if it is killed remotely by a stranger?  ...

Read more  Amateur Radio,  Ailunce HD1,  Kill

Why can't my HD1 set the RX frequency to 447.1875MHZ?

Do you know why can't your UV dual-band radio HD1 set the RX frequency to 447.1875MHZ?  ...

Read more  Amateur Radio,  Ailunce HD1

How to set the microphone speaker of Retevis RT73?

Retevis RT73 is the new generation of mini DMR ham mobile radio from Retevis. It not only has a built-in speaker on the radio, but the original microphone also has a built-in speaker. so you can set up our speakers according to your needs when you use the transceiver.  ...

Read more  Mobile radio,  Retevis RT73

How to set the Time Slot of Retevis RT73?

Retevis RT73 is the new generation mini DMR mobile radio of Retevis. We know that the time slot is also a very important part when setting the DMR channel, otherwise, it will fail to communicate successfully. Today we will talk about the precautions for the RT73 time slot setting.  ...

Read more  Retevis RT73,  Time slot

Do you need Kenwood audio adapter for your Ailunce HD1

If you have Ailunce HD1, do you have the time that must use a Kenwood 2-pin mic, headphones, or other accessaries? If yes, the adapter is your savior.  ...

Read more  Amateur Radio,  adapter

Why set the color code

Recently, our ham cute came over to ask why we need to set the color code. today let's talk about the color code. Everyone who uses digital radios knows that the color code is an important parameter for setting the digital channel, but why do you need to set the color code? We need to understand the source of the color code.  ...

Read more  Amateur Radio,  Color code

Why need to set time slot

When setting the DMR channel, in addition to the color code setting, we also need to set the time slot. We know that the color code is set to reduce co-channel interference, so why set the time slot?  ...

Read more  Amateur Radio,  Time slot

How to set the shift Freq on Ailunce HD1

Ailunce HD1 is ham radio and supports Front Panel Programming. if we set the channel in simplex mode, the rx frequency is the same as the rx frequency. but how set the Shift Freq of the channel in repeater mode?  ...

Read more  Ailunce HD1,  Amateur Radio