Author
Four kinds of CW key
- Sep 28,2020
- Yamy
- 0 Comments
- Amateur Radio Topics
For CW morse key, now we most commonly use the double paddle automatic morse key. In fact, in addition to the automatic double paddle button, there are three types of morse keys including straight key, single paddle morse key and semi-automatic morse key. ...
NVIS:Guarantee of Short-Wave near field communication
- Sep 28,2020
- Yamy
- 0 Comments
- Radio knowledge
NVIS is short for Near Vertical Incidence Skywave. It's short-range near field communication method which is widely used in military communications, nearby emergency rescue and other fields. NVIS and DW are the main methods of shortwave communication, so what is the difference between them? ...
Do you need antenna analyzer or Standing wave meter
- Sep 26,2020
- Yamy
- 0 Comments
- Amateur Radio Topics
Both the antenna analyzer and the standing wave meter can be used to test the standing wave of the antenna feeder system, but the functions and characteristics of them are also quite different. So, should we choose an antenna analyzer or a standing wave meter? ...
How to choose the right power supply for your radio?
- Aug 28,2020
- Yamy
- 0 Comments
- Amateur Radio Topics
Power supply is the basic equipment for hams. especially for shortwave radio and mobile radio, the input voltage can affect the output power. So, it's very important to choose the suitable power supply. but, what aspects should we pay attention to when choosing a power source for our radio? ...
What's passive and active GPS antenna?
- Aug 28,2020
- Yamy
- 0 Comments
- Amateur Radio Topics
As the most important receiving component of GPS module, GPS antenna is the main window of GPS to the outside world. Speaking of GPS antennas, we have to mention the active and passive antennas we often talk about. Do you know the difference of them? let's learn more together. ...
How to make a link budget?
- Aug 27,2020
- Yamy
- 0 Comments
- Radio knowledge
A link budget is usually used to estimate the longest distance for a signal to travel between transmitter and receiver. This is also the main method for evaluating the coverage range of a wireless communication system and is an important work in wireless network planning. So how to make a simple link budget? ...
How to debug the Antenna after installed?
- Aug 27,2020
- Yamy
- 0 Comments
- Amateur Radio Topics
After we complete , it needs to be debugged. The purpose of antenna debugging is to make the antenna system resonate at the transceiver frequency by trimming the length of the antenna element. Match the impedance of the antenna system with the transceiver impedance of the radio. Debugging generally uses standing wave meter, power meter or antenna analyzer. ...
What do you need to know when installing an outdoor antenna
- Jul 28,2020
- Yamy
- 0 Comments
- Amateur Radio Topics
Why is your signal report of 50W radio not as good as the one just 5W radio? That's because in addition to the environmental loss, the power of the radio has a lot of loss in the antenna system. So many hams like to install them antenna outdoor to reduce antenna system loss. But what do you need to know when installing an outdoor antenna? ...
What you need to know about SWR
- Jul 25,2020
- Yamy
- 0 Comments
- Amateur Radio Topics
SWR is short for Standing Wave Ratio. It's a parameter often used by hams to indicate if the antenna matchs with the transmitting radio. For SWR value, it has different effects on the built-in and external antennas. so there are differnt SWR standard required for antennas with the different working environment. ...
What's vertical GP Antenna?
- Jun 05,2020
- Yamy
- 0 Comments
- Amateur Radio Topics
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. ...