Category Archives :Amateur Radio Topics

ACS is short for Adjacent Channel Selectivity. It is a measure of the receiver's ability to receive useful modulated signals and is an important parameter of radio receivers.  ...

The spring antenna is also called the helical inductive antenna, which is a kind of helical antenna. It can radiate and receive radio waves. when transmitting, it can convert high-frequency current into electromagnetic waves; when receiving, it can convert electromagnetic waves into the high-frequency current. So it plays a very important role in radio communication.  ...

PSK31 is the abbreviation of Phase Shift Keying 31.25 Hz. PSK31 is an excellent digital modulation mode and just needs extremely narrow bandwidth. its transmission rate is always maintained at 31.25 bits per second, so it is called PSK31. It is mainly developed by the SP9VPC and G3PLX.  ...

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.  ...

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?  ...

Radio direction-finding is the process of using instruments to determine the direction of radio waves based on the propagation characteristics of electromagnetic waves.   ...

Lora is short for Long Range. It is a low-power LAN wireless standard created by Semtech company. Its biggest feature is that it can travel farther than other wireless methods under the same power consumption condition, achieving low power consumption and Long-distance unity, it is 3-5 times longer than the traditional radio frequency communication distance under the same power consumption.  ...

Many antennas of amateur radios are detachable, then customers can replace the higher gain antennas to extend the communication range according to their needs. However, the non-original high-gain antenna interface can't connect to our radio directly, or the antenna is too long to directly connect horizontally, we need to choose a suitable adapter to connect them. So, how to choose the right adapter?  ...

etiquette tips for this Amateur Radios QSO  ...

There are three common types of radio scanners for us to select, including the basic analog scanner, the analog trunking scanner, and the digital scanner.  ...