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For hams, there are many bands to use, such as UHF, VHF, HF, and so on. For Radio Operation Certificate Examination, frequency bands learning is very important item. why new ham needs to learn frequency bands? the blog will tell you.  ...

Do you know what are QSO modes of amateur radio? There are five modes for hams to QSO, including Audio, Morse code, RTTY, TV(SSTV) and Packet QSO modes. According to a recent research, the most used mode for hams to is audio QSO, and the next is Morse code.  ...

There are too types of antennas for us to select, but what's the best antenna? how to select antenna for our radios? there are some tips for your reference in the blog.  ...

CW QSO is one of the important way to communicate with hams all around of the world. But do you know which modulation is it? let's learn how to identify the modulation of CW QSO in the blog.  ...

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.  ...

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.  ...

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.  ...

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.  ...

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.  ...