Blog

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.   ...

"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.  ...

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.  ...

The purpose of squelch is to strictly suppress the noise, but if the suppression is excessive, the weak call signal will also be restricted and cannot be received.  ...

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.  ...

David Bell who create a codeplug editor for Retevis RT73, it is also beta version.  ...

How to erase codeplug Retevis RT73 totally?  ...

Roaming refers to setting the radio to automatically move between them according to which repeater has a strong signal.  ...

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.  ...

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？  ...