During the important period of global epidemic prevention and control, the claim that amateur radio might soon be your only way to communicate bring up again. Because so many people do things online, the internet and mobile communication network become narrow even crash to affect for normal communication.  ...

Ailunce HS2 is an ultra-portable full-frequency full-mode SDR radio. The HAM-BOX mobile app we developed allows the mobile phone to easily control and play radio stations.  ...

Amateur radio enthusiasts have always been regarded as special "players". Most of them have noble industry spirit and social responsibility. However, radio amateurs are also a complex group: there are repeater builders, DX players, DIY technicians, etc., which kind do you belong to as a radio amateur?  ...

Many customers tell us their Ailunce HD1 keep getting the error of No Contacts by email. Do you encounter the problem? Why do you get the error of No Contacts? there are two key points to pay attention to for you.  ...

Many customers get errors when upgrading firmware because the radio doesn't enter DFU mode successfully. So, we need to distingguishi standby mode, DFU mode, and initialization mode to prevent operation errors.  ...

International Amateur Radio Union (IARU) Region 2 (the Americas) is looking for a few volunteers to work together to brainstorm ideas and possible actions to increase ham radio’s attractiveness for the 21st century.  ...

There are many speaker mics without voice knob in the market. Retevis release a new speaker HK008 with adjustable voice knob. We can adjust the voice through the speaker mic, not only relay on the radio voice knob.  ...

The operation of Fuji No.3 (FO-29) has been unstable, but the transmitter will be turned on in the next pass. Since the date and time are in UTC, add 9 hours to convert to Japan time.  ...

The polarization of antennas refer to the space vector direction of the electric field of the antenna in its maximum radiation direction. There are three polarizations including linear polarization, circular polarization, and elliptical polarization. Among them, linear polarization and circular polarization are more common.  ...

The Retevis's new generation of wide-narrow converged communication wireless intercom smart system integrates DMR, analog and other narrow-band private network technologies &3G / 4G LTE, WLAN and other wide-band technologies to provide end-to-end voice, data and other full-service convergence solutions.  ...