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POTA is short for Parks on the Air. It is a radio outdoor communication activity initiated by American Hams. The activity frequency bands include HF/UHF/VHF, etc., and the communication modes include voice, digital, CW, SSTV, etc. If you enjoy outdoor communication, you can participate in this activity by querying the NPOTA park map on Google Maps under the conditions of the operating permit.  ...

Combiner is a words often mentioned by hams who uses multi-band radios, so what is a combiner? Why do we need to use a combiner? Let’s learn more about the combiner today.  ...

Balun is short for Balance To Unbalance Transformer. Balun can use to transmission between balanced and unbalanced, impedance transformation, and so on.There are current and voltage balun to select for us.  ...

Ailunce HS2 is a full-frequency SDR tranceiver. If there is a local analog repeater, you can connect to repeater with your Ailunce HS2. but do you know how to set it? Today we will take Zhengzhou Relay as an example to show the detail steps.  ...

For ham, it is very interesting to do some simple DIY to achieve some of your own special demands. Therefore, it is a simplest need to know the function of programming interface. Today we will take a look at several programming interfaces of Retevis and Ailunce.  ...

Recently many customers have problems of connecting DMR repeater. How to set Ailunce HD1 in software to connect DMR repeater? If you're a newbie, and want to connect to DMR repeater, please try to set your Ailunce HD1 again. the blog provides the detail steps that you can refer to.  ...

The RT74 portable single-frequency repeater recently is developed by Retevis is with the latest technology, the most stable components, the most advanced production technology. It is a lightweight, ultra-portable design, minimal installation DMR repeater.  ...

In amateur radio world, one of ham's favorite radios is the SDR transceiver. So what's SDR radio? What is the difference between SDR and traditional transceiver ? what are advantages and disadvantage of SDR? Let's study together.  ...

The specification of walkie-talkie is an important reference for us to know whether it meets our needs. For example, the working mode of walkie-talkies is often marked with words such as F3E or F2D. Do you know what it means? Today let's study together.  ...

In order to improve communication quality and communication efficiency of CW, people have invented and used various abbreviations in long-term practice, which is to abbreviate frequently used words and sentences in communication to one or a few letters. It has evolved and perfected and formed the abbreviation that is now commonly used internationally. There are two common rules for commonly used English abbreviations.  ...