Tag Archives :N
What functions do you need for your desktop microphone
- Jun 30,2021
- Yamy
- 0 Comments
- Amateur Radio Topics
The desktop microphone is one of the commonly used devices in the Ham Room. However, there are many desktop microphones on the market, with various functions. The following are some features we sorted out. What features do you need? ...
Why do you need a desktop microphone for your walkie-talkie?
- Jun 30,2021
- Yamy
- 0 Comments
- Amateur Radio Topics
With the popularity of radio, many hams built their radio rooms. In addition to basic equipment such as radio and power supply, we found that they always like to purchase desktop microphones. Do you know why they have to buy a desktop microphone when owning a handheld microphone? ...
What's the Spring antenna
- Jun 29,2021
- Yamy
- 0 Comments
- Amateur Radio Topics
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. ...
What is the Difference Between Simplex and Repeater Channels?
- Jun 29,2021
- Vivian
- 0 Comments
- User Tutorial
From the beginning when I learn the ham radio knowledge, There are two basic ways to using your radio. One is simplex, the other more popular way is using a repeater. I often get confused how to operate a radio connect to a repeater, the shift frequency downlink and uplink.Today, let us learn the difference between simplex and repeater. ...
How many ISS SSTV Images have you Received?
- Jun 22,2021
- Vivian
- 0 Comments
- User Tutorial
ARISS report there will be an “Amateur Radio on Shuttle, Mir and ISS” Slow Scan TV (SSTV) event from June 21-26. Transmissions from the International Space Station will be on 145.800 MHz FM using PD120. ...
The Benefits of Using Temperature-controlled Fans in Mobile Radios
- Jun 20,2021
- Yolanda
- 0 Comments
- Radio Function
So now many vehicle-mounted stations are equipped with temperature-controlled fans, and the air pressure and air volume of the fans are controlled by the temperature changes in the vehicle-mounted stations to achieve the effect of energy-saving. ...
How to set the time of Retevis RT73
- Jun 18,2021
- Yamy
- 0 Comments
- User Tutorial
Some customers don't know how to set the time of Retevis RT73. Do you know how to adjust the time? There are three ways to adjust the time of Retevis RT73. ...
What is the difference between roaming and scanning of the walkie-talkie?
- Jun 03,2021
- Yolanda
- 0 Comments
- Radio knowledge
Roaming refers to setting the radio to automatically move between them according to which repeater has a strong signal. ...
Why is necessary to set the squelch level?
- May 31,2021
- Yamy
- 0 Comments
- Radio Function
Walkie-talkies communicate with each other by radio signals. Different from wired communication, background noise will inevitably appear in radio communication. This kind of noise is tiresome and causes auditory interference and fatigue to users. The purpose of setting the squelch level is to control the influence of back noise. ...
What's QPSK modulation?
- May 31,2021
- Yamy
- 0 Comments
- None
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? ...