Blog
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's PSK31?
- Jun 29,2021
- Yamy
- 0 Comments
- Amateur Radio Topics
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. ...
What kind of earpieces do you want to use with your walkie-talkie?
- Jun 29,2021
- Yamy
- 0 Comments
- Amateur Radio Topics
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. ...
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. ...
What is the Difference Between GMRS and Ham Radio?
- Jun 29,2021
- Vivian
- 0 Comments
- User Tutorial
what is the difference between GMRS and ham radios? ...
Which Retevis DMR Radio Supports APRS
- Jun 28,2021
- Vivian
- 0 Comments
- User Tutorial
Do you know which Retevis DMR Radio supports APRS feature? ...
How to do when your RT3S locked on 150Mhz frequency
- Jun 28,2021
- Vivian
- 0 Comments
- User Tutorial
Help My RT3S wont key up below 150Mhz and 450Mhz, how do I get it back to normal frequency? ...
How to set Analog APRS on Retevis RT73
- Jun 28,2021
- Vivian
- 2 Comments
- Retevis RT73
please make sure your RT73 firmware version above than the 20210329 version. Because the APRS feature was added on 20210329 version firmware. ...
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. ...
Why is the Mobile Radio Easy to Burn the Power Amplifier?
- Jun 20,2021
- Yolanda
- 0 Comments
- Radio knowledge
"If the antenna feed is not well-matched, it will burn the power amplifier." That is, if the standing wave ratio is high, there will be the risk of burning the power amplifier. ...