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The amateur satellite organization AMSAT commented on a notice from the Federal Communications Commission that proposed the deletion of the 3.3-3.5 GHz (9 cm band) amateur band, of which 3.40-3.41 GHz was originally allocated for the amateur satellite service.  ...

As we all know, the transmission distance of VHF and UHF signals is very limited in normal, but under certain conditions, long-distance or even ultra-long-distance transmission can also be achieved.  ...

RT90 is a dual band DMR mobile radio. It supports UHF and VHF, Analog mode and DMR mode, dual standby. Two power level, the max power is 50w. Here I will show more information of it.  ...

The RT80 is a DMR handheld walkie-talkie designed on the basis of Time Division Multiple Access (TDMA) technology. It supports three modes: digital, analog and digital-analog hybrid, and is compatible with existing conventional analog and DMR-based walkie-talkies.  ...

Compared with average people, hams uses the radio more often. So it is necessary to know some maintenance and common troubleshooting methods of the two-way radio.  ...

Bluetooth is a wireless technology, In recent years, Bluetooth technology has been used on wireless two way radios. Such as on Ailunce HD1, you can connect a Bluetooth adapter. another example, on Retevis RT78, it can be program on APP via Bluetooth.  ...

radio amateurs are the only ones who can give assistance when communications fail in the face of the devastating power of nature, such as hurricanes or earthquakes.  ...

Retevis has many waterproof walkie talkies. We have make a simple test in this video.  ...

Share the experience Ailunce HD1 use in firm emergency.  ...

Planned Amateur Radio Satellites  ...