vertical am antenna

137 links

Antennas for 160m - The best results work when you have an antenna with a large vertical component. It is difficult to get a horizontal antenna (dipole) high enough to be an effective antenna on 160. However, there are several easy things you can do with your present antenna to initially get on the best amateur radio band
[ Hits: 1124 | Votes: 0 | Rating: 0 ]
Short Vertical for 160 meters - A top band shortened vertical antenna project. This project includes drawing and MMANA-GAL output screens.
[ Hits: 307 | Votes: 2 | Rating: 9 ]

High Performance 40 Meters Vertical - 40 meter vertical antenna construction, a shortened easy-to-build vertical, with no-radials, made from surplus military camouflage poles
[ Hits: 2233 | Votes: 2 | Rating: 8.5 ]

6 metre SOTA Antenna - A simple and light vertical coaxial dipole for 50-52 MHz band, designed for portable SOTA operations based and inspired by the VK2ZOI flower pot antenna
[ Hits: 165 | Votes: 0 | Rating: 0 ]

Quick antenna length calculator - An excel spreadsheet that in a really simple way checks how much to trim your antenna elements. Download the xls file and watch the presentation video include in this page
[ Hits: 771 | Votes: 0 | Rating: 0 ]

50:450 Ohm (9:1) Balun for vertical antennas - A page describing how to home made a custom 9:1 balun for a common portable wire antenna. The author suggest to use 4C65 or FT140-61 toroids instead of the common Amidon T200-2
[ Hits: 516 | Votes: 11 | Rating: 6.72 ]

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 ]
J-pole antenna Calculator - Online calculator for J-Pole antennas. The J-pole antenna consists of a short and a long vertical pole with a feed point near the bottom. The antenna looks like the letter J, hence the name J-pole antenna.
[ Hits: 417 | Votes: 0 | Rating: 0 ]
Improving Gain of the Super J-Pole Antenna - The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. Get 0.8 dB more gain out of the trusty Super-J by replacing the traditional phasing stub with a long coil.
[ Hits: 192 | Votes: 0 | Rating: 0 ]

The Near Vertical Incident Skywave (NVIS) antenna - Introduction to NVIS antenna and NVIS propagation. A simple NVIS antenna can be constructed as shown in this article
[ Hits: 475 | Votes: 1 | Rating: 10 ]

Portable or Emergency VHF Antennas - Ground Plane - 1/4 wave vertical, J-Pole, 3 Element Yagi Beam and simple antenna supports
[ Hits: 1010 | Votes: 1 | Rating: 8 ]
The Stake Stick Vertical - A portable HF vertical antenna that can be used from 10 to 20 meters band
[ Hits: 397 | Votes: 0 | Rating: 0 ]

Taming the Quadrifilar Helical Antenna - The Quadrifilar Helical antenna provides circular polarization and complete hemispherical reception, which is precisely what is needed to receive the polar orbiting weather satellites, and as a 2 meter antenna it will receive horizontal, vertical and clockwise circular polarization.
[ Hits: 374 | Votes: 0 | Rating: 0 ]

The Gamma Match - The gamma match was originally invented as a means of feeding vertical monopole antennas for medium wave broadcasts, which were earthed at the base for lightning protection- Hams are more likely to use a gamma match to feed a dipole or loop element, but the basic theory is easier to understand for the case of a quarter wave monopole.
[ Hits: 957 | Votes: 2 | Rating: 4.5 ]

DIY Dual Band 144-440 MHz vertical antenna - A homemade VHF/UHF vertical antenna made essentially with RG58 coax cable, with a 9 turns choke balun to prevent the shield acting as a RF Radiator.
[ Hits: 1376 | Votes: 14 | Rating: 5.5 ]

5 Band Pipe Vertical Antenna - A simple, cheap and easy to build 26 feet long vertical antenna that works DX on 20 - 10 meters including WARC Bands, it is designed for portability for field days, camping, or permanent installation, cost, and to achieve at least 1/2 wavelength on the WARC bands.
[ Hits: 554 | Votes: 5 | Rating: 6.2 ]

James Pole Antenna - Hand-tuned, J-Pole Antennas. The James Pole Antenna is constructed of 1/2 inch Type M copper pipe, soldered together and capped on both vertical elements. Each Antenna is tuned for center frequency.
[ Hits: 218 | Votes: 0 | Rating: 0 ]

TransWorld TW2010L Review - A brief review of the TW2010L Backpacker Antenna. This is a portable vertical antenna covering 10,12,15,17 and 20m
[ Hits: 424 | Votes: 2 | Rating: 9.5 ]

Cushcraft R8 Vertical Project - 40/30/20/17/15/12/10/6 Meters antenna setup and assembly with high res pictures of the R-8 Antenna
[ Hits: 279 | Votes: 0 | Rating: 0 ]

Antenna Calculation Software - The program consists of tabbed pages for various antenna and transmission line calculation. You can compute the values for an inverted L network that will allow you to match the 50 ohm output of the radio, or you can compute the necessary length in the units of choice for a 5/8 wave vertical for 10 meter band.
[ Hits: 435 | Votes: 1 | Rating: 10 ]