Tag Archives :AMATEUR RADIO

Earpieces are very important in the daily use of walkie-talkies. They can not only protect the privacy of our QSO, but also make the reception effect better. According to different wearing ways, earpieces can be divided into in-ear, ear-hook earpieces, and headsets.  ...

QPSK is short for Quadrature Phase Shift Keying or called four-phase shift keying. and it is a digital modulation. Do you know how QPSK works？  ...

The common satellites use FM transponders, so a simple FM walkie-talkie can realize FM satellite communication. So what should be paid attention to when setting up an FM satellite communication channels?  ...

The baud rate is the number of code symbols transmitted per second. It is a measure of the symbol transmission rate. For electronic communication, the baud rate is the modulation rate, which refers to the rate at which the effective data signal modulates the carrier, that is, the number of times the carrier modulation state changes per unit time.  ...

C4FM is a digital modulation for walkie-talkies that hobbyists prefer. Do you know what C4FM means? What are the advantages and disadvantages compared with other digital work modes?  ...

Do you know know how to set a group call in the software of Ailunce HD1 or on Ailunce HD1 directly?  ...

14 Things you need to know about Retevis RT73.  ...

Many customers feedback they can't switch to VFO mode on Retevis RT72. Do you know how to switch to VFO mode on Retevis RT72? If no, you can check the blog. we'll show the all detailed steps that you need to do.  ...

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.  ...

GP antennas is short for GroundPlaneAntenna. These antennas are with a ground plane. Their elements are usually mounted by vertical ground, so they are also called vertical GP antennas. The antennas has a low emission inclination, and its coverage is similar to a circle with the radius of the emission point, so it is indispensable as a simple and effective DX weapon. The disadvantage is that it is a little noisy.  ...