Category Archives :Amateur Radio Topics

The 5-tone of the walkie-talkie is also often referred to as 5-tone signaling.  ...

Recently many hams contact us and want to transmit the 11-meter band on Ailunce HS2. What's the 11-meter band?  ...

Recently we're doing the research of Ailunce FS01 footswitch for PTT, and the words including Mechanical life and Electrical life appear. Do you know what's the difference between Mechanical life and Electrical Life?  ...

UTM is short for Universal Transverse Mercator Grid System (UTM). that is said the universal transverse Mercator grid coordinate system, which is a flat rectangular coordinate.  ...

SHTF radio is often thought to be essential to prepare for disaster. but which model of the radio do we select to be the SHTF radio?  ...

NXDN is short for Next Generation Digital Network, and a type of digital technology like DMR.  ...

For hams, QRP refers to transmitting at reduced power. QRP radio means very low-power radio, normally 5W or less power​. QRP Communication is one of the more exciting projects in the activities of amateur radio.  ...

As we known from FCC rules, an amateur radio license does not confer GMRS frequencies.  ...

Many hams like to make QSO outdoor, so the battery is very important to them. Do you know what are the common amateur radio portable batteries?  ...

Each antenna has a certain frequency range called bandwidth. In the range, the antenna has the lower impedance and the highest efficiency, which is equivalent to a band-pass filter. The best frequency point in the middle of the frequency range is the center frequency, its SWR is the lowest, and the efficiency is higher.  ...