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China Launched CAMSAT CAS-6 Satellite on December 20  ...

NFM is a narrowband frequency modulation method, which is suitable for communication signals with a channel bandwidth of 25kHz / 12.5kHz; WFM is a wideband frequency modulation method, which is suitable for receiving broadcast signals with a channel bandwidth of about 180kHz  ...

Zones are just a way to manage large number of channels, much like file folders or directories on your computer.  ...

Do you know the Yagi antenna? The yagi antenna works very well in direction finding and long-distance communication. Today we'll learn the Yagi antenna with Ailunce AY01.  ...

The ham radio equipment usually is used for emergencies, like hurricanes. Why not use it to call Santa?  ...

Retevis RT50 is a UHF DMR radio, compatible with digital and analogue mode, using TDMA technology, designed with Tier II, AMBE++ vocoder, compatible with Mototrbo protocol etc. Its exterior design is simple and generous. IP67 waterproof and dust-proof function allow you use them anywhere without worrying the surrounding environment.  ...

In the morning of Christmas Eve, December 24, we will try to start the old Alexanderson 200 kW transmitter, from 1924 and send out a Christmas message on VLF 17.2 kHz CW. The transmitter will be tuned up from around 08:30 (07:30 UTC) and a message* will be transmitted at 09:00 (08:00 UTC).  ...

is it necessary to write a Rx group list in the CPS? You can add all your favorite talk groups in one RX group list, also the talk groups with the same time slot in an RX group list. also, make all the talk groups belong to the same country in one RX group list. The principle is you can hear any talk groups that are in one Rx group list but only can transmit to the TX contact associate with the current channel. ​  ...

Is there an agreed upon average RX/TX setting for the DMR Hotspot?  ...

Retevis has a radio Bluetooth kit, It can let your radio achieve Bluetooth pairing through Bluetooth adapter with the Bluetooth earpiece and Bluetooth PTT. It can give you a better wireless experience. Here I will show you some information about the radio Bluetooth kit.  ...