counterpoise

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counterpoise

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Antennas : 160M

  • 160M Folded Counterpoise - An FCP is not magic. It has no gain. An FCP improves an antenna system by replacing more loss with less loss. Some have been able to erect better wires in the air because the small size of the FCP allowed better placement of the antenna.
    [ Hits: 252 | Votes: 0 | Rating: 0 ]
Antennas : 80M
  • Lambda / 2 no Counterpoise ATU - The Multibandfuchs by DL7AQT, Frank
    [ Hits: 434 | Votes: 0 | Rating: 0 ]
  • 80m Vertical Antenna with Folded CounterPoise - A very efficient 80 meter Counterpoise antenna designed to reduce ground losses from inadequate radial systems beneath inverted L antennas, a project by DM2GM and DM4IM based on the original K2AV antenna concept.
    [ Hits: 1088 | Votes: 2 | Rating: 7 ]
Antennas : Dipole
  • Horizontal Half-wave Dipole above a Counterpoise - All antennas that are situated close to the ground are affected by that ground to some extent. This article explain effects and benefits of counterpoise.
    [ Hits: 1271 | Votes: 0 | Rating: 0 ]
Antennas : EH
  • EH antennas and CFA antenna - Many antennas function because of common mode currents, rather than working in spite of them. Two popular examples are CFA and EH antennas. Another recent example, appearing in Antennex's compact antenna articles, is a thick stub "vertical" with no counterpoise.
    [ Hits: 2018 | Votes: 3 | Rating: 5.67 ]
Antennas : End-Fed
  • TEFV Terminated End Fed Vee Antenna - The Terminated End Fed Vee Antenna (TEFV) is a travelling wave antenna with constant current distribution. Unlike traditional resonant antennas, TEFV operates without standing waves, using a terminating resistor for broadband efficiency. With a combination of vertical and horizontal polarization, it offers wide bandwidth from 1.8 MHz to 30 MHz, eliminating the need for a tuner. Key components include a 9:1 unun transformer and a 500-ohm terminating resistor. Grounding and counterpoise enhance performance, and it can handle power losses of up to 30%. TEFV provides an effective, versatile antenna solution for amateur radio and broadcast applications.
    [ Hits: 183 | Votes: 2 | Rating: 6.5 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • End Fed Half Wave Antenna Coupler - A home made end-fed half-wave antenna coupler with antenna lenght calculator and counterpoise calculator based on center frequency. Includes pictures and drawings along to antenna homebrewing instructions with a home made on air wound transformer
    [ Hits: 282 | Votes: 0 | Rating: 0 ]
  • HF EFHW Antenna Antenna Tuner - Schemaric diagram for a 80m, 40m, 30m, 20m EFHW Antenna Antenna Tuner. The tuner has been designed for an antenna length of 41m and the counterpoise 7.5m.
    [ Hits: 117 | Votes: 0 | Rating: 0 ]
Antennas : Portable
  • HB9MTN C-Pole Porable antenna - A vertical monoband that's small, light and portable, needs no counterpoise and performs as well as a home antenna
    [ Hits: 4139 | Votes: 7 | Rating: 8.43 ]
  • Portable End Fed Zepp - The no counterpoise antenna
    [ Hits: 2502 | Votes: 0 | Rating: 0 ]
  • No Ground Antenna - A no ground antenna solution for backpackers, balconies or plastic car bodies, like RV or other portables uses where is difficult to find a good counterpoise by PD7MAA
    [ Hits: 784 | Votes: 0 | Rating: 0 ]
  • Portable Vertical Antenna - A home made portable vertical antenna, that with a single 1/4 wave counterpoise wire is possible to achieve less than 1.5:1 SWR on 40, 30, and 20 meter bands. It is basically a center load, shortened ground plain vertical antenna.
    [ Hits: 362 | Votes: 0 | Rating: 0 ]
Antennas : Stealth
  • Balcony Vertical HF Antenna - The simple balcony vertical HF antenna made with plastic fishing pole. Just along the pole I install copper wire in 7 meter length. Then was installed ATU. It was used home brew tuner. For each band was used one counterpoise in length 0.8 x lambda/4
    [ Hits: 237 | Votes: 0 | Rating: 0 ]
Antennas : Theory Antennas : W3EDP Antennas : Wire
  • The K2AV FCP Single Wire Folded CounterPoise - Efficient Low Band Counterpoise for Restricted Circumstances Loss Avoidance Opportunities and Techniques for the Low Bands The short and linear FCP was designed to reduce ground losses from inadequate radial systems beneath inverted L and other vertical antennas.
    [ Hits: 283 | Votes: 0 | Rating: 0 ]
  • Long Wire Antenna for portable operations - With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a 9:1 voltage unun including a tuner or simply with a tuner is one possible solution. With the 9:1 voltage unun and wire lengths suggested in the below tables the antenna should present non extreme impedances for all HF amateur band frequencies. This page is far from complete and represents the ongoing investigation into this type of antenna. Experiments to date seem to have raised more questions than obvious answers.
    [ Hits: 796 | Votes: 13 | Rating: 8.69 ]
Operating Modes : Portable Operations
  • Hamstick Experimentation: A Day of Surprising Results - In his POTA activation, WK4DS experimented with radials for hamstick antennas. Despite sun and RF noise challenges, successful connections were made. Surprisingly, tuned radials proved unnecessary, simplifying setup. Hamsticks demonstrated versatility across frequencies. Increased power improved signal quality, sparking his curiosity for further exploration in radio technology.
    [ Hits: 44 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Vertical Antenna : GAP Titan
  • W9GF GAP TITAN DX Antenna Installation - An unusual Titan DX antenna seutp, done without the standard counterpoise. This document is not an official manual, but rather a personal note to record the antenna setup with the custom wire counterpoise.
    [ Hits: 471 | Votes: 2 | Rating: 9 ]

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