Category Archives :Amateur Radio Topics

Retevis RB85 is the noise reduction commercial walkie-talkie launched by Retevis in 2021, but after the product was launched, many hams had a very heated discussion below the related Youtube video, because they believed that noise reduction is also very important for HAM.  ...

Is your repeater easily charged? Common repeater charger ways are including two categories, one is the DC charger and the other is the AC charger. Some people prefer DC power, others prefer AC power supply, which is determined by personal practical needs. What are the advantages and disadvantages of DC and AC charger?  ...

MGRS, UTM, and USGS are often talked together. Do you know what any connection between them？  ...

Amateur frequency resources are provided by the country to all hams, so repeaters working in the amateur band, even if you set up and maintain them yourself, need to provide services for all hams in the coverage area, let's learn together today What problems should be paid attention to when setting up an amateur repeater. ​  ...

When using multi-band or even full-band radios, we usually need to choose the working mode, which includes USB and LSB, that means the Upper Side Band and the Lower Side Band. they are the SSB signals, and the DSB is the sum of the USB and LSB  ...

There are so many radio brands in the market and so more radios. how do know the radios that can work together?  ...

DTMF is the abbreviation of Dual Tone Multi-Frequency, that is, dual-tone multi-frequency. It refers to the sound or tone that the phone makes when pressing a number, where each key has two tones of a specific frequency, which are then transmitted over the voice channel.  ...

The 5-tone of the walkie-talkie is also often referred to as 5-tone signaling.  ...

Recently many hams contact us and want to transmit the 11-meter band on Ailunce HS2. What's the 11-meter band?  ...

Recently we're doing the research of Ailunce FS01 footswitch for PTT, and the words including Mechanical life and Electrical life appear. Do you know what's the difference between Mechanical life and Electrical Life?  ...