ld ratio

ld ratio

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• Beverage Antennas - So you want to build a Beverage Antenna. This article offers insights on building a two-wire Beverage antenna for better reception. Key points include using long wire (at least a wavelength, ideally two), keeping it straight and away from vertical conductors, and sloping ends for noise reduction. The author recommends copper clad wire and mentions transformer design considerations for later discussion.
  [ Hits: 6543 | Votes: 5 | Rating: 7.2 ]

• Setting the SWR of Your Antenna - SWR (standing wave ratio), is a measurement of how efficiently your antenna system will radiate the power available from your radio. In simple terms, your radio would like to radiate all of its power, but can only do so if the other components cooperate
  [ Hits: 1253 | Votes: 0 | Rating: 0 ]

• Yagi Element Mounting Considerations - One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom
  [ Hits: 4306 | Votes: 2 | Rating: 8.5 ]

• Antennas for HF mobile operation  ^pop - The following description should give you guidance on how to build a mobile antenna for HF bands yourself, using a very cheap CB-mobile whip antenna base. Antennas for mobile operation 7Mhz ,10Mhz, 14Mhz, 18Mhz, 21Mhz, 24Mhz,28-430Mhz
  [ Hits: 90297 | Votes: 80 | Rating: 5.12 ]

• Travel loop antennas - PA11019 Travel loop antennas, these antennas cover 6.300 to 29.200 mHz , handle 35 Watts and have a packing size of 43 cm, ideal for fieldwork, or mobile operations.
  [ Hits: 3564 | Votes: 2 | Rating: 9.5 ]

• Antenna for deed restricted lots  ^pop - An effective 10-20m DX antenna for deed restricted lots. The article by K7ZB introduces a simple 10-20m DX antenna suitable for deed-restricted lots. The antenna, a 15' vertical design, facilitated contacts with over 200 countries worldwide. Its design employs a telescopic aluminum tube and radial wires for multi-band operation, requiring an external antenna tuner for optimal performance. The mounting scheme and construction details ensure effectiveness and ease of use.
  [ Hits: 56292 | Votes: 13 | Rating: 6.46 ]

• Antique Radio Restoration & Repair - We specialize in restoring family heirlooms, Grandma's and Grandpa's old radio, Mom and Dad's special set, and the radios you enjoyed as a child!
  [ Hits: 7401 | Votes: 9 | Rating: 5.22 ]
• Radio Relics - Repair and Restoration Services in Orlando USA
  [ Hits: 996 | Votes: 1 | Rating: 4 ]

• Summits on the Air (SOTA) - Summits on the Air is an exciting new award scheme for radio amateurs which encourages operation in mountainous and wilderness areas. The sceme is designed to grow into an international awards.
  [ Hits: 1150 | Votes: 6 | Rating: 10 ]

• ARES vs RACES - ARES vs RACES FAQ: Two Flavors of Amateur Radio Emergency Operation
  [ Hits: 966 | Votes: 1 | Rating: 1 ]

• The Microwave Journal - Microwaves articles, The Technology Voice of the Wireless World , need registration to access
  [ Hits: 1098 | Votes: 1 | Rating: 1 ]

• US Tower - US Tower Corporation will build your special tower to your specifications. We are capable of producing just about anything you need.
  [ Hits: 15269 | Votes: 13 | Rating: 6.31 ]

• International Components - International Components Corporation has an extensive range of electronic components consisting of audible signal devices, speakers, microphones, capacitors, electron tubes, connectors, and accessories designed in recognition of the diversity of applications and special characteristics encountered by designers in today's complex world.
  [ Hits: 1723 | Votes: 0 | Rating: 0 ]

• K0BG - Mobile Radio Operations - This site is dedicated to mobile amateur radio operators, old and new alike. Whether you are into HF, or VHF operation, the information presented will increase your enjoyment of our great hobby.
  [ Hits: 1075 | Votes: 22 | Rating: 9.1 ]

• Scanrec Scanner Recorder - Scanner Recorder (Scanrec) is a free audio recorder that is primarily designed to record speech. It has a VOX control that allows the user to save disk space when no sound is present in the signal. Since FM communications has such an effective squelch, the recorder works best with FM. HF ham bands and World Band radio have such a poor signal to noise ratio that the VOX gate on Scanrec might not be very easy to set.
  [ Hits: 15541 | Votes: 53 | Rating: 6.82 ]

• Atlas software for DX hunters - Electronic World atlas for radio amateurs. DXCC and province prefixes, CQ and ITU Zones in the rectangular and azimuthal projections, continuous zoom and scrolling, Gray Line, city and island index, unique hierarchical prefix database. COM/OLE Automation for easy integration with 3-rd party programs.
  [ Hits: 7219 | Votes: 2087 | Rating: 8.35 ]

• PortaLog - "Optimized for mobile, portable, and field operations; synchronizes with popular desktop logging programs. Anywhere, anytime - always have your logbook handy. For Palm OS"
  [ Hits: 1950 | Votes: 2 | Rating: 9 ]

• KMIJ Kenwood Remote Control for TS-850/TS-450 - Windows radio control software for the Kenwood TS-850S and TS-450S HF Rigs. Originally released as shareware, there is a version that is now Freeware, with free registration upon request. Old program by VE3MIJ
  [ Hits: 12590 | Votes: 66 | Rating: 6.8 ]

• 600 Watt HF Amplifier  ^pop - Schematics plans by K9GDT and all infos to build a 600 Watt HF Amplifier. The amplifier uses four Motorola MRF150 50 volt TMOS power FETs configured in push-pull/parallel and biased for class AB linear operation.
  [ Hits: 70395 | Votes: 127 | Rating: 4.45 ]

• Next generation beacon - The next generation beacon platform for the OZ7IGY beacons should encompass both the analog and digital mode, i.e. FSK and MGM in a mixed mode configuration
  [ Hits: 386 | Votes: 2 | Rating: 10 ]

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