Search results
Results from the WOW.Com Content Network
The company focuses on station accessories, including antenna tuners and antenna switching equipment. MFJ was founded in 1972 by Martin F. Jue. As of 2014, the company was recognized as the largest producer of amateur radio products worldwide. [2]
BASIC keywords and character mapping are slightly altered on Ringo R-470 compared to the ZX81. Entry is still accomplished per keyword token, obtained using different cursor modes and key combinations, but these are different from the ZX81.
Martin F. Jue is an American business personality, inventor and founder/owner of several companies, including MFJ Enterprises, Hy-Gain, Cushcraft, [2] Ameritron, Vectronics and others, all of which manufacture products for the amateur radio industry. He holds numerous patents on specialized technology, especially in the area of T network field ...
William Ittner Orr (1919–2001) was an engineer, educator, communicator, and ham radio operator. [1] [2] [3] He was the American author of numerous amateur radio and radio engineering texts.
Those RTs with power settings can vary transmission range from approximately 200 meters (660 feet) to 10 kilometers (km) (6.2 miles). Adding a power amplifier increases the line of sight (LOS) range to approximately 40 km (25 miles). (These ranges are for planning purposes only; terrain, weather, and antenna height can affect transmission range.)
An isotropic antenna radiates equal power in all three dimensions, while an omnidirectional antenna radiates equal power in all horizontal directions, but little or none vertically. An omnidirectional antenna's radiated power varies with elevation angle: Maximum in the horizontal, and diminishing as the azimuth rises to align with the antenna's ...
An interactive electronic technical manual (IETM) is a portal to manage technical documentation. IETMs compress volumes of text into just CD-ROMs or online pages which may include sound and video , and allow readers to locate needed information far more rapidly than in paper manuals.
The trideco antenna is a huge specialized umbrella antenna used in a few high power military transmitters at very low frequency (VLF). [5] [6] In a conventional umbrella antenna, the use of the sloping guy wires as the capacitive top load has some disadvantages: First, since the umbrella wires must be anchored to the ground, their length is ...