l antennas

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l antennas

1414 links - and 47 categories

Antennas : 160M
  • Short Top Band Antenna - A shortened 160 meters band antenna for hams who do not have 260 ft of space, based on a open-wire-fed short dipoole
    [ Hits: 1579 | Votes: 2 | Rating: 10 ]
Antennas : 40M : 40 meter Vertical Antennas Antennas : 80M
  • Broadband 80 meter dipole - The AB2RA bowtie 80 meter antenna includes also a 40 meter dipole
    [ Hits: 864 | Votes: 0 | Rating: 0 ]
Antennas : Baluns
  • When and Where to Use Baluns - Baluns are usually used by Hams to feed dipole antennas with 50 ohm coax and to transpose from ladder line feeding a multi-band antenna to the unbalanced input of an antenna tuner.
    [ Hits: 1522 | Votes: 9 | Rating: 7 ]
Antennas : Feed Lines
  • Why good Antennas need good Coax cable - The importance of an efficient antenna feed line that can minimize the disturbing noise for an optimal signal reception
    [ Hits: 462 | Votes: 1 | Rating: 10 ]
Antennas : Homebrewing Techniques Antennas : J-Pole
  • Improving the Super-J - The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. As many attest, there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. The Super-J has very little separation between the two half-wave radiators.
    [ Hits: 972 | Votes: 2 | Rating: 5.5 ]
Antennas : Portable
  • Antennas for portable operations - Article describing various type of portable antennas, from verticals, to dipoles, vertical dipoles, random wire with tuners, and end-fed antennas
    [ Hits: 500 | Votes: 0 | Rating: 0 ]
Antennas : Theory
  • Designing Vertical Aerials - If you want to design vertical antennas you can find all theory and formulas used to model a vertical aerial calculating capacitance, reactance, building the inductor and calculating resistances. Includes an excel spreadsheet to calculate efficiency.
    [ Hits: 576 | Votes: 0 | Rating: 0 ]
Antennas : Vertical
  • Short Vertical Antennas and Ground Systems - Relevance of a proper ground systems on short HF vertical antennas, with an analysis on a vertical antenna for 160 meter band
    [ Hits: 458 | Votes: 0 | Rating: 0 ]
  • Radials on Vertical Antennas - Experimental Determination of Ground System Performance for HF Verticals
    [ Hits: 1403 | Votes: 9 | Rating: 6.67 ]
Antennas : Wire
  • Wire antennas for ham radio - A collection of drawings of most popular wire antennas for hf ham radio bands
    [ Hits: 739 | Votes: 2 | Rating: 10 ]
Antennas : Yagi
  • Simple Gain Antennas for the Beginner - You do not need to invest an absurd amount of money to build a beam type of antenna. Good performance can be obtained with simple antennas made from some very ordinary materials. QST article
    [ Hits: 1061 | Votes: 4 | Rating: 6.5 ]
Manufacturers : Antennas : Military
  • Comsystems Solutions - HF Antennas is a division of Comsystems Solutions we manufacture wire broadband antennas and different type.
    [ Hits: 188 | Votes: 2 | Rating: 3 ]
Radio Equipment : HF Amplifiers : Acom 1000
  • Mod for Acom 1000 amplifier - The problem originates by improper TXOUT-to-RF timing (RF transmission exists still after a TX-EN prohibition), combined by too long decay of their CW pulses.
    [ Hits: 511 | Votes: 0 | Rating: 0 ]
Shopping and Services : Regional : USA
  • Delta Electronics - Delta Electronics, Inc. NY USA, family owned and operated selling all varieties of consumer electronics including 10 meter amateur radios, antennas, accessories, microphones, cw transmitters, coax cables and more
    [ Hits: 326 | Votes: 0 | Rating: 0 ]
Software : Antenna rotor control
  • Moontracker - A moon tracking software capable to drive the rotation of your antennas in azimuth and elevation
    [ Hits: 958 | Votes: 1 | Rating: 6 ]
Technical Reference : Coax Cables and Connectors
  • QRO Coaxial Relay for 50 MHz - Build a SPDT coaxial relay that can be used as a main Transmit/Receive relay or an A-B switch to select between two different 6m antennas
    [ Hits: 362 | Votes: 0 | Rating: 0 ]
Technical Reference : QRM Eliminator
  • Noise Canceller Project - This project was intended to accompany the stealth antenna project. Author want to see how effective a noise canceller could be in reducing the background noise floor when attic / stealth antennas are being used.
    [ Hits: 709 | Votes: 0 | Rating: 0 ]
Technical Reference : Vector Network Analyzer
  • Analyzing 6 handheld antennas with a VNA - In this article the author analyze six different type of VHF handheld antennas and as result of his self training on his new vector network analyzer published this interesting report
    [ Hits: 408 | Votes: 1 | Rating: 1 ]

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