If a secure connection is important, this technology is the first choice. A satellite telephone provides a connection for voice and / or...

Personal Mobile Radio PMR radios are popular, and not without reason. The devices work at approx. 446 MHz (thus in the UHF range). They...

Radio signal propagation in the VHF. UHF, SHF and EHF - range VHF : Very High Frequency 30 MHz - 300 MHz UHF: Ultra High Frequency ...

Signal propagation in the long, middle and shortwave range LW: Low wave / frequency: 30 kHz - 300 kHz MW: Medium wave / frequency: 0,3...

Citizen Band in the 27 MHz - range CB radios work in the upper shortwave range at approx. 27 MHz. The radio frequencies are therefore in...

Only toy radios in the PMR range come close to the properties of "full-blown" devices. Most of the time, however, the devices for the...

When radio becomes a hobby Amateur radio operators have passed a state examination in which they have proven their knowledge of radio...

World receivers and crank radios A radio receiver provides entertainment and information. If you are in the transmission area of ​​FM or...

Digital modes for datacommunications The combination of laptop and radio is now common in the outdoor area. On the one hand, the user has...

Radio relais are located in exposed locations and are used to transmit the received signal again in order to cover a larger transmission...

Morse code is still in use internationally after more than a hundred years. Many military personnel are still being trained in it. Due to...

Shortwave connections cannot guarantee a 100% connection due to the changing propagation conditions. Nevertheless, such devices are still...