found in the Heathkit HW-7 and HW-8 lines, which introduced many amateurs to QRP'ing and led to the popularity of the mode. Enthusiasts operate QRP radios on the HF bands in portable modes, usually carrying the radios in backpacks, with whip antennas. Some QRPers prefer to construct their equipment from kits, published plans, or homebrew it from scratch. Many popular designs are based on the NE612 mixer IC, i.e. the K1, K2, ATS series and the Softrock SDR. Organizations Amateur radio organizations dedicated to QRP include QRP Amateur Radio Club International (QRPARCI), American QRP Club, G-QRP Club based in the United Kingdom, and The Adventure Radio Society emphasizing portable QRP operation. Major QRP gatherings are held yearly at hamfests such as Dayton Hamvention, Pacificon, and Friedrichshafen. Contests and awards There are specific operating awards, contests, clubs, and conventions devoted to QRP enthusiasts. In the United States, the November Sweepstakes, June and September VHF QSO Parties, January VHF Sweepstakes, and the ARRL International DX Contest, as well as many major international contests have designated special QRP categories. For example, during the annual ARRL's Field Day event, making a QSO (ham-to-ham contact) using "QRP battery power" is worth five times as many points as a contact made by conventional means. The QRP ARCI club sponsors 12 contests during the year specifically for QRP operators. Typical awards include the QRP ARCI club's "thousand-miles-per-watt" award, available to anyone presenting evidence of a qualifying contact. QRP ARCI also offers special awards for achieving the ARRL's Worked All States, Worked All Continents, and DX Century Club awards under QRP conditions. Other QRP clubs also offer similar versions of these awards, as well as general QRP operating achievement awards. See also Amateur radio homebrew List of amateur radio QRP transceivers Notes References Amateur radio