Category Archives :User Tutorial

Many hams want to upgrade the firmware of their Retevis RT90, but there are many versions of firmware on the support page of Retevis RT90. Then, which version of firmware do you need for your Retevis RT90?  ...

The Difference between Battery Eliminator and Chargers  ...

If the radio supports the rolling code, you just need to make one codeplug to program many radios. the blog will show how to use the Rolling Code of Retevis RT73.  ...

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 radios?  ...

Do you know which Retevis DMR Radio supports APRS feature?  ...

Help My RT3S wont key up below 150Mhz and 450Mhz, how do I get it back to normal frequency?   ...

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.   ...

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.  ...

Ailunce HS1/HS1 PLUS is an SSB HF SDR ham transceiver, so we can use some computer third-party software, such as WSJT-X，and so on. today we'll show some key settings for Ailunce HS1/HS1 PLUS in WSJT-X.  ...