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[24] [25] [26] Introduced in the year 2000, the radio was known for its "all-in-one" functionality. It can transmit on all amateur radio bands between 160 meters and 70 centimeters, with the exception of the 1.25 meters band, and the "X" model also has built-in 23 centimeters band capability option. Kenwood discontinued production of the TS ...
Spektrum DX6i six-channel spread spectrum computerized aircraft radio which may be used for both helicopters and fixed-wing models. Spektrum is a brand of radio control systems designed for use with hobby radio-controlled cars and aircraft. Spektrum is a division of Horizon Hobby.
For example, the peak envelope power limits for the highest available license classes in a few selected countries are: 2.25 kW in Canada; [67] 1.5 kW in the United States; 1.0 kW in Belgium, Luxembourg, Switzerland, South Africa and New Zealand; 750 W in Germany; 500 W in Italy; 400 W in Australia, India, and the United Kingdom; and 150 W in Oman.
In the 1970s, the Swan 500 was upgraded again and became the model 700 and 750, and underwent a styling change in later versions after the merge with Cubic. Swan also designed a matched, separate receiver and transmitter pair, the 600R and 600T, which together offered better performance, higher output power and many more features than the ...
Midway through the 4-Line's run, in 1967, Drake introduced a receiver and transmitter pair meant for the Novice licensee - the 2-C receiver and 2-NT transmitter. The 2-C was an improved receiver based on the 2-B design using a few more solid state devices. Thus, it was a sophisticated design compared to most other receivers targeting Novices.
For many years, amateur radio operators were required by international agreement to demonstrate Morse code proficiency in order to use frequencies below 30 MHz. In 2003 the World radiocommunications conference (WRC) met in Geneva, Switzerland, and voted to allow member countries of the International Telecommunication Union to eliminate Morse ...
Instead of the 500 kHz and 1 MHz frequencies common in shipboard radio at the time, Marconi was to use longwave frequencies of 37.5 kHz for transmission from Glace Bay, Cape Breton, Nova Scotia to Letterfrack and 54.5 kHz for transmission from Clifden, Ireland to Louisbourg in order to establish reliable transatlantic communication day and night.
The Magnavox model AW-100 was introduced in 1957 and was among the first commercial fully transistorized shortwave radio receivers, [9] along with the Trans-Oceanic Royal 1000 (1957) [10] [11] [12] and Trans-World Portable T-9 Code 126 (1958). [13] As shortwave receivers evolved, they gained a number of improvements over their early counterparts.