Category Archives :Amateur Radio Topics

If you play with the coaxial cable, you probably know it is available in a number of different impedances. but the most common is 50ohm coaxial cable for us to use for amateur radio. Do you know why is 50ohm, or any other number?  ...

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.  ...

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.  ...

For CW morse key, now we most commonly use the double paddle automatic morse key. In fact, in addition to the automatic double paddle button, there are three types of morse keys including straight key, single paddle morse key and semi-automatic morse key.  ...

Both the antenna analyzer and the standing wave meter can be used to test the standing wave of the antenna feeder system, but the functions and characteristics of them are also quite different. So, should we choose an antenna analyzer or a standing wave meter?  ...

Power supply is the basic equipment for hams. especially for shortwave radio and mobile radio, the input voltage can affect the output power. So, it's very important to choose the suitable power supply. but, what aspects should we pay attention to when choosing a power source for our radio?  ...

As the most important receiving component of GPS module, GPS antenna is the main window of GPS to the outside world. Speaking of GPS antennas, we have to mention the active and passive antennas we often talk about. Do you know the difference of them? let's learn more together.  ...

After we complete , it needs to be debugged. The purpose of antenna debugging is to make the antenna system resonate at the transceiver frequency by trimming the length of the antenna element. Match the impedance of the antenna system with the transceiver impedance of the radio. Debugging generally uses standing wave meter, power meter or antenna analyzer.  ...