How to Connect the RT9550 with HD1?

How to Connect the RT9550 with HD1? We all know that repeater is always used for amplify signals, increase communication distance and extend coverage. Retevis put a new repeater on the market, it is RT9550.  It is a DMR Repeater, have Digital/Analog mode. Today we will talk about how to connect the RT9550 with HD1 by software and…

Ailunce HD1 Field Programming Radio

Ailunce HD1 Field Programming Radio review

Since Ailunce HD1 Field Programming Radio was released officially from Jan,2018, Lots of hams volunteered to do all kinds of reviews,even someone called it’s a game changing radio. When you try to search “Ailunce HD1”on youtube.com, you will find so many videos, especially a review from MikesRadioRepair is very neutral and objective, you would find some interesting points when he breaks down Ailunce HD1 below.

What is the CTCSS and DCS?

What is the CTCSS and DCS? In telecommunications, CTCSS and DCS are systems used to reduce the annoyance of listening to other users on a shared two-way radio communications channel. What’s the CTCSS? CTCSS is Continuous Tone Coded Squelch System. It does this by adding a low frequency audio tone to the voice. Where more than one group…