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AMSAT Opposes FCC Plan to Delete the 3.4 GHz Band

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.  ...

Read more  AMSAT Opposes FCC Plan to Delete the 3.4 GHz Band

How to transmit long distance for UHF and VHF ?

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.  ...

Read more  VHF&UHF long-distance transmission,  Amateur radio

Retevis RT90 Dual Band DMR Mobile Radio

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.  ...

Read more  Dual Band DMR Mobile Radio

Retevis RT80 Inverted Screen DMR Walkie Talkie

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.  ...

Read more  Ham Radio,  RT80,  Inverted screen

How to maintain walkie-talkie

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.  ...

Read more  radio maintain,  radio common troubleshooting methods

Getting to know Bluetooth

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.  ...

Read more  Bluetooth technology

Radio amateurs test communications for the impact of a meteorite

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.  ...

Read more  radio amateurs in Spain,  radio amateurs

Retevis Waterproof Walkie Talkie

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

Read more  Waterproof Walkie Talkie

RTC29 Multi Unit Charger Station Bank Charger for RT29 HD1

Retevis RTC29 Multi Unit Charger Station Bank Charger for RT29 Ailunce HD1.  ...

Read more  RTC29 Multi Unit Charger Station