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In amateur radio, QRP operation refers to transmitting at reduced power while attempting to maximize one's effective range. QRP operation is a specialized pursuit within the hobby that was first popularized in the early 1920s. QRP operators limit their transmitted RF output power to 5 W or less regardless of mode (Some call 10 W on Phone QRP) . [1]
An antenna tuner, a matchbox, transmatch, antenna tuning unit (ATU), antenna coupler, or feedline coupler is a device connected between a radio transmitter or receiver and its antenna to improve power transfer between them by matching the impedance of the radio to the antenna's feedline. Antenna tuners are particularly important for use with ...
11 QRP transceivers. 12 See also. 13 References. ... and Kenwood AT-250 automatic antenna tuner (right) Other series include the 100, 500, and the 2000 series ...
[1] [2] With internal battery pack, on board keyer, its all mode/all band capability and flexible antenna, the set is particularly well suited for portable use. The FT-817 is based on a similar circuit architecture as Yaesu's FT-857 and FT-897, so it is a compromise transceiver and incorporates its features to its low price ($670.- at its 2001 ...
Elecraft's product lineup includes QRP CW transceivers, the K2 and K3 all-mode 100W transceivers, KX2 (80m-10m) and KX3 (160m–2m) portable transceivers, linear power amplifiers, panadapters, and accessories including antenna tuners and signal generators.
Like many other radios of its class the IC-7300 has an internal antenna tuner and contains an internal audio card accessible over USB. [1] [5] This allows the radio to be used for popular digital modes such as PSK31, Winlink, and FT8. [6] [7] The radio has received praise for its easy to use menus, large readable screen, and excellent audio ...