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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

Hams Save Lives at Critical Times from The Two Emergency Rescues

Recently Local HAMs use a repeater to assist in rescues. Let's have a look at how they did a repeater call to help prevent more damage.    ...

Read more  Local HAMs assist in recent rescues,  ham save lives in Emergency Rescues

Retevis First Single Frequency Repeater is Coming.

Single-frequency repeater, it is a repeater that uses only one frequency to achieve the repeater function. It allocates one timeslot to receive a signal and the other to transmit it at the same frequency, using DMO mode to extend radio coverage.  ...

Read more  single frequency repeater,  retevis RT74

Two New Chinese Ham Satellites Expected to Launch in September

Two new Chinese amateur radio satellites are expected to launch on September 15.  ...

Read more  amateur radio satellites,  CAMSAT