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An ICOM IC-7300 Radio Tuned to the 20 Meter Band. The ICOM IC-7300 is a multimode 6 meter, 4 meter (ITU Region 1 only) and HF base station amateur radio transceiver. [1] The IC-7300 was announced to the public at the Japan Ham Fair in 2015. [2] The radio has 100 watts output on CW, SSB, and FM modulations and 25 watts of output in AM. [3]
Some television sets will continue to use analog NTSC tuners if connected to an analog cable system, or a converter box (which may receive digital signals over the air, from a cable system, or from a satellite system). Low-power stations continue to broadcast in analog, but these must transition to digital by September 1, 2015, or go silent. [89]
Aurorae only occasionally affect signals on the 2 metre band. Signals are often distorted and on the lower frequencies give a curious "watery sound" to normally propagated HF signals. Peak signals usually come from the north, even if the signal originates from a station to the east or west of the receiver.
There have been several system improvement programs, including the Integrated Communications Security (ICOM) models, which have provided integrated voice and data encryption, the Special Improvement Program (SIP) models, which add additional data modes, and the advanced SIP (ASIP) models, which are less than half the size and weight of ICOM and ...
The D-STAR open radio system was developed by Icom based on digital radio protocols developed by the Japan Amateur Radio League and funded by the Ministry of Posts and Telecommunications. [6] This system is designed to provide advanced voice and data communications over amateur radio using open standards.
Systems that use NXDN also support mixed analog FM and digital NXDN equipment, including direct radio-to-radio communications. This allows system owners to migrate to a narrowband, digital system without replacing the entire system at once. NXDN equipment is currently FCC type-accepted for use on VHF (137-174 MHz) and UHF (406-512 MHz) bands.
South Africa (ITU Region 1): On Friday 25 May 2018 South African regulator ICASA published the National Radio Frequency Plan 2018 in which amateur radio was allocated 100 kHz on a shared basis in the 60-meter band. The spectrum 5350 to 5450 kHz is now available to all licensed South African radio amateurs on a shared non-interference basis ...
The fact of connecting a ham radio station to a telephone network exists from the beginning of the ham radio operators, even commercially, as the case of Carterfone [2] (with lawsuits filed by the companies to which it was connected [3]), but it was not possible to talk about mobile telephony until the arrival of the cellular network AMPS, initially using a car phone as the cellular terminal ...