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Category Archives :Amateur Radio Topics

What's 5-tone?

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

Read more  Amateur radio,  5-tone

What's the 11 meter band

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

Read more  Amateur radio,  11 meter band,  CB band

What's the difference between Mechanical life and Electrical Life?

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?  ...

Read more  Foot switch PTT,  Mechanical life,  Electrical life

What's the UTM system?

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.  ...

Read more  Amateur Radio,  UTM,  GPS system

What's the SHTF radio?

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?  ...

Read more  SHTF Radio,  ham radio

What's the NXDN

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

Read more  Amateur Radio,  NXDN

QRP Communication

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.  ...

Read more  Amateur Radio,  QRP

Does the ham radio license also cover the GMRS license?

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

Read more  GMRS license,  Ham Radio license

How to select the battery for your HF tranceiver

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?  ...

Read more  Amateur Radio,  Battery

What's the center frequency of antenna

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.  ...

Read more  Amateur Radio,  Antenna,  center frequency