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Retevis RT73 Dual Band 20W Mini DMR Digital Mobile Transceiver Radio

Retevis new generation Mini DMR mobile radio RT73, it integrated brand new features, and be capable of all advanced digital technology features. It utilizes TDMA technology to attain double call capacity on a permitted frequency.  ...

Read more  Retevis RT73,  Mini Mobile Radio

What is FT8?

In recent years, amateur radios have popularly used digital modes for communication. Many ham friends have heard of the names of digital modes such as JT65 and FT8. Ham friends who have HF or 50MHz radio stations can hear many "beep-hoo-" tones at certain points in time on the frequencies in the table below. This is a kind of digital mode, FT8 signal.  ...

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Retevis RT44 The Ultimate Outdoor Networking Device

Retevis RT44 with GoHeart app is the ultimate outdoor networking device with a user-friendly interface that allows users to get help, track friends and talk to them without needing internet or telecommunication signal.  ...

Read more  Ultimate Outdoor Networking Device,  Retevis RT44

A New Professional Outdoor Communication Tool Retevis RT44 is Coming

No matter climbing, canyoning, country sports, cycling, ,wilderness-survival-bushcraft, extreme sports etc. communication is very important. Retevis according to the needs of outdoor enthusiasts design a outdoor communication tool RT44. It can meet all your outdoor needs.  ...

Read more  Professional Outdoor Communication Tool

What is a Repeater Frequency?

A repeater receives a signal on one frequency and simultaneously retransmits (repeats) it on another frequency. The frequency it receives on is called the input frequency, and the frequency it transmits on is called the output frequency.   ...

Read more  Repeater Frequency,  Downlink Frequency,  Uplink Frequency

Uncover the Secrets of the Antenna -3

Let's talk about another important concept of the antenna: polarization.  ...

Read more  Antenna,  Polarization

Uncover the Secrets of the Antenna -2

what are electromagnetic waves? how does the antenna send these electromagnetic waves out? how does the antenna realize the directional emission of electromagnetic waves? how do you measure the coverage and gain of the antenna's main lobe? After reading the article, you will understand.  ...

Read more  Antenna,  Electromagnetic Waves

Uncover the Secrets of the Antenna -1

wireless communication also transmits information through antennas, except that it transmits electromagnetic waves that carry useful information. The figure below is an example of mutual communication between a mobile phone and a base station.  ...

Read more  Antenna,  Electromagnetic Waves

Which Radio is Suitable for Beginners?

Simple operation makes it easier for new scholars to get started. Powerful function makes experienced hams also love it very much.  ...

Read more  Radio Beginners

How Should I Choose and Use My Mobile Radio?

Mobile radio generally installed in the car. Its power directly come from car battery. The power of mobile radio is around 25-50w, with a high gain antenna, the communication distance is usually around 30 kilometers. This is not achievable with a handheld radio.  ...

Read more  Mobile Radio