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22 links about high db on dxzone.com

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Antennas : 2M
  • 2 Meter 10 Element Quagi Antenna - This antenna was designed by N6JSX Kuby for Transmitter hiding. Fitting the requirements of directionality, high gain, and portability. This antenna was derived from the ARRL Handbook information on Quagi's and Yagi's; in the absence of two meter Quagi information, UHF Quagi dimensions were scaled into 146 MHz use.
    [ Hits: 11799 | Votes: 19 | Rating: 6.95 ]
Antennas : 70cm
  • High gain vertical antenna for UHF  updated - How to build a high gain vertical antenna for the UHF amateur or CB Bands, by radio experimenters handbook
    [ Hits: 2841 | Votes: 4 | Rating: 4.75 ]
Antennas : Delta loop
  • 80m Band 5 Element Delta Loop - Design of a 5 elements delta loop beam antenna offering a high F/B ratio and 7.5 dbi gain
    [ Hits: 341 | Votes: 1 | Rating: 4.00 ]
Antennas : Feed Lines : Choke
  • Eliminating TX RF Feedback Problems - Malfunction of transceivers due to stray RF pickup is a common problem, especially when using end-fed antennas, high-impedance feedlines, or a poor ground counterpoise
    [ Hits: 1630 | Votes: 1 | Rating: 1.00 ]
Antennas : J-Pole
  • The DBJ-1 VHF-UHF Dual Band J-Pole - Searching for an inexpensive, high performance dual band base antenna for VHF and UHF ? Build a simple antenna that uses a single feed line for less than $10.
    [ Hits: 5012 | Votes: 5 | Rating: 6.00 ]
Antennas : Loop
  • Tri-Mode Buffer Amplifier Box - The TMB-1 is an RF amplifier unit / receiving accessory that can be used with a low-impedance broadband loop, a high-impedance terminated loop (such as a Pennant, Flag, or Kaz Delta), and whip (telescoping rod) antennas.
    [ Hits: 719 | Votes: 1 | Rating: 1.00 ]
Antennas : Theory : Antenna Gain
  • Decibels Explained - What decibel mean in RF Gain and how used DB Values in Gain calculation
    [ Hits: 297 | Votes: 0 | Rating: 0.00 ]
Antennas : WiFi
  • High Performance 802.11 Antenna - It is cheap and simple and has a gain of about 17 dBi.
    [ Hits: 8104 | Votes: 6 | Rating: 9.17 ]
  • Cookie Cantenna Wi-Fi - Make a cheap, portable, high performance (15-18 db) directional antenna out of commonly available parts that can be purchased in most grocery and hardware stores.
    [ Hits: 4117 | Votes: 1 | Rating: 10.00 ]
Antennas : Wire
  • D3 Antenna for Field Day - D3+ High Performance Antennas for Field Day. This article describes versatile broadband wire antennas. These antennas will double your effective radiated power over a dipole, will be easy and inexpensive to build and install, and will be simple to match.
    [ Hits: 1807 | Votes: 6 | Rating: 4.67 ]
Manufacturers : Accessories
  • Kiwa Electronics - Kiwa Electronics is a company that specializes in accessory equipment for the radio enthusiast. Our products include Filter Modules to improve receiver performance, a High Performance Medium Wave Air Core Loop Antenna for improved broadcast band reception, the Pocket Loop Antenna, the Earth Monitor, BCB Rejection Filter and Broadband and SW Preamps. We also offer numerous performance upgrades for popular receivers.
    [ Hits: 2531 | Votes: 4 | Rating: 8.50 ]
  • HiZ-Antennas - High impedance amplifiers for shortened vertical antennas, Array matched and Optimized 15dB Preamplifier
    [ Hits: 595 | Votes: 1 | Rating: 10.00 ]
Manufacturers : Amplifiers
  • Empower RF Systems - We offer a large selection of standard and custom High Power RF and Microwave amplifiers for broadband, general communication, matched band, and personal communication markets.
    [ Hits: 2722 | Votes: 3 | Rating: 8.33 ]
Manufacturers : Antennas : Military
  • MARS Antennas - MARS, Israel's Antenna and RF System manufacturer, flat antennas for cellular, military broadband, multiband MF high power antenna
    [ Hits: 2588 | Votes: 6 | Rating: 7.00 ]
Manufacturers : Antennas : VHF UHF Microwave : Quad Antennas
  • SuperPass Company Inc. - Antenna manufactuer, Panel antennas, sector panel antennas, high gain for ISM, MMDS, PCS, GSM, CDMA, TDMA, 400MHz, 900MHz,1.9GHz, 2.4GHz, 2.7GHz, 3.5GHz,5.8GHz. Broadband wireless applications for ISP,ASP.
    [ Hits: 1703 | Votes: 4 | Rating: 5.50 ]
Manufacturers : Antennas : VHF UHF Microwave : Yagi Antennas
  • RF HAMDESIGN - An engineering oriented organization specializing in the design and manufacture of high performance parabolic antennas, 3dB high power RF couplers, Antenna power splitters, directional RF couplers and more items for RF transmission from HF through Microwave frequencies.
    [ Hits: 1332 | Votes: 4 | Rating: 9.00 ]
Technical Reference : Homebrew
  • Z Match for Higher Power - Single coil Z match witch handles the power of the linear amplifier
    [ Hits: 2957 | Votes: 13 | Rating: 7.93 ]
  • Home Made 5KV Capacitor - Building a high voltage (5KV), variable plate capacitor (17 to 220pF)
    [ Hits: 308 | Votes: 1 | Rating: 6.00 ]
Technical Reference : Power Supply
  • A secure power supply - Dchematics and photos of a secure power supply (short-cut, Rf feedback, high voltage etc.) by iz7ath
    [ Hits: 6790 | Votes: 3 | Rating: 8.67 ]
Technical Reference : Radio Frequency Interference : BPL
  • Broadband news : Canadian BPL - Hydro-Québec joins efforts to provide high-speed internet service via power-lines
    [ Hits: 314 | Votes: 0 | Rating: 0.00 ]
  • Amperion Inc BPL tests - Amperion Inc. issued an announcement that it has successfully tested its broadband powerline (BPL) technology over high-voltage, 69,000-volt transmission lines.
    [ Hits: 296 | Votes: 3 | Rating: 3.67 ]
  • Are you ready for BPL - Broadband over power lines (BPL) is a technique for transmission of high speed data (broadband Internet) over powerlines. Access BPL technology injects radio frequency energy into powerlines which were not designed for transmission of radio frequency energy, and leak substantial energy that causes interference to radiocommunications service
    [ Hits: 507 | Votes: 0 | Rating: 0.00 ]
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