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The commonly used English abbreviations of CW

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.  ...

Read more  CW,  English abbreviations,  morse code

Four kinds of CW key

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.  ...

Read more  AmateurRadio,  CW key,  Bug key

NVIS:Guarantee of Short-Wave near field communication

NVIS is short for Near Vertical Incidence Skywave. It's short-range near field communication method which is widely used in military communications, nearby emergency rescue and other fields. NVIS and DW are the main methods of shortwave communication, so what is the difference between them?  ...

Read more  AmateurRadio,  NVIS,  ShortWave

Hams Help Find Kids by Monitoring FRS Radios

It was a very unusual situation, hams use their U/V handheld to help quickly find the missing kids.  ...

Read more  radio hams,  FRS radios

Do you need antenna analyzer or Standing wave meter

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?  ...

Read more  AmateurRadio,  Antenna analyzer,  standing wave meter

Retevis RT85 DOT-MATRIX LCD display Dual Band Analog Radio

Retevis RT85 is an analog radio which comes with emergency alarm function. Its frequency range is VHF 136-174Mhz and UHF 400-470Mhz. For the first time use full dot matrix screen.  ...

Read more  emergency analog radio,  retevis rt85,  dual band analog radio

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

The History of China's Amateur Radio Competition in My Eyes 6

The History of China's Amateur Radio Competition in My Eyes 6, In 1990-1991, the group station operators were younger  ...

Read more  China's Amateur Radio Competition

The Advantages of Digital Filters

Digital filter can effectively filter out the frequency point of a specific frequency or the frequency other than the frequency point and is a device or circuit that has a signal processing effect. It is equivalent to the "sieve" of frequency.  ...

Read more  digital filter,  digital filter advantage

The History of China's Amateur Radio Competition in My Eyes 5

China Amateur radio competition rising phase of the cycle 1988-1989  ...

Read more  Amateur Radio Competition