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The Electron tube power amplifier is the most common power amplifier of hams. we summarize some precautions when use the Electron tube power amplifier in the blog.  ...

At present, most of the radios we use are within 100W, or even below 50W. But with the increasing electromagnetic interference in cities, it has become more and more difficult to make QSO with hams around the world with only these radios. In order to improve the quality of communication and increase the transmitting power of the radio, it is necessary to buy a short-wave high-power amplifier to work with our radios.  ...

If you're outdoor, with no PC and programming cable to use, you can program your Retevis RT72 via the front panel. We'll show the key settings of programming Retevis RT72 without PC in the blog.  ...

Recently many customers want the codeplug of Retevis RT72. Today we will show the details of programming it in the software, then you can try to make your own codplug.  ...

Can I receive analog as well as DMR in a channel? many customers ask the questions. I want to say yes if you own a Retevis RT80. Retevis RT80 support to analog, DMR, and mixed-mode. today let's learn more about mixed receive.  ...

If you play with the coaxial cable, you probably know it is available in a number of different impedances. but the most common is 50ohm coaxial cable for us to use for amateur radio. Do you know why is 50ohm, or any other number?  ...

Ailunce HS2 is an ultra-portable full-frequency full-mode SDR radio. There are many setting items for the user to set. So, if you want to use the Ailunce HS2 more masterly, you need to understand the setting menu clearly first.  ...

Recently many customers feedback the contacts importing of Retevis RT3S works abnormal. so we sum up the problems. if you want to import the contacts list into the Retevis RT3S, or have problems when import the contact list, please try to check again refer to the blog.  ...

We know that the shortest distance is straight line between two points. but it's often not simple when hams communicate with each other from around the world. Because it's not the shortest distance geographically if we connect two points directly on world map, we need to select the right direction of antenna to achieve the better communication effect. Especially for directional antennas, such as Yagi antennas. we must rely on the great circle Maps.  ...

We know when we upgrade the firmware or initialize the Ailunce HD1, the radio need to be in the right mode, such as it must in DFU mode, when we upgrade the firmware. Then when we program the Aliunce HD1, must the Ailunce HD1 be in a particular state?  ...