l antennas

l antennas

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• 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: 1575 | Votes: 2 | Rating: 10 ]

• A Simple 40 Meter Vertical for Field Day - A dipole antenna for 7 MHz support for this antenna is fiberglass military mast
  [ Hits: 983 | Votes: 1 | Rating: 5 ]

• Broadband 80 meter dipole - The AB2RA bowtie 80 meter antenna includes also a 40 meter dipole
  [ Hits: 853 | Votes: 0 | Rating: 0 ]

• Building and Using an Experimental Beverage - An interesting article about planning and testing beverage antennas for 80 and 160 meters in a rural location
  [ Hits: 783 | Votes: 3 | Rating: 5.33 ]

• 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 ]

• Chocking the End-Fed Antenna - Stop common-mode current when transmitting with an end-fed antenna. Unbalanced antennas are very prone to currents on the outside of the coax.
  [ Hits: 822 | Votes: 1 | Rating: 8 ]

• Fixture for fast assembling VHF Antennas - This fixture id intended for fast assembly and disassembly of VHF antennas, expecially usefull for experimenters
  [ Hits: 612 | Votes: 0 | Rating: 0 ]

• 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: 969 | Votes: 2 | Rating: 5.5 ]

• 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 ]

• 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 ]

• 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: 457 | Votes: 0 | Rating: 0 ]
• Radials on Vertical Antennas - Experimental Determination of Ground System Performance for HF Verticals
  [ Hits: 1365 | Votes: 9 | Rating: 6.67 ]

• 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: 1050 | Votes: 4 | Rating: 6.5 ]

• Comsystems Solutions - HF Antennas is a division of Comsystems Solutions we manufacture wire broadband antennas and different type.
  [ Hits: 187 | Votes: 2 | Rating: 3 ]

• 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: 502 | Votes: 0 | Rating: 0 ]

• 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: 319 | Votes: 0 | Rating: 0 ]

• Moontracker - A moon tracking software capable to drive the rotation of your antennas in azimuth and elevation
  [ Hits: 911 | Votes: 1 | Rating: 6 ]

• 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: 354 | Votes: 0 | Rating: 0 ]

• 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: 699 | Votes: 0 | Rating: 0 ]

• 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: 406 | Votes: 1 | Rating: 1 ]

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