helically wound vertical

Petlowany Antennas by K6NO - WorldRadio Article on Petlowany antennas base on this principle: if a length of wire is wound into a spiral-shaped coil and excited by a radio frequency current connected to the innermost portion of the coil, it will then, and only then, exhibit RF characteristics that closely approximate those of a resonant linear wire of the same length

The Battle Creek 40 80 160 m antenna - 3 Band vertical Marconi-antenna for the bands 40, 80, 160 meters with a ground net of wires as radials.

K1FTK 160 Meter Antenna Projects - K1FTK 160m vertical antenna project, K1FTK beverage antenna project

The Doble L antenna for 160 and 80 m - The antenna has the form of a C, it is fed in the centre of the vertical section which is abt 20 m high by HB9TPL

20 Meter Vertical Moxon - A 14 mhz version of the vertical moxon antenna homebrewed by Paul M1PAF

OH2FFY - Car Antenna Priority listing - Low cost build up of a 20 meter vertical for stationary mobile use that performs exceptionally well.

Full 1/4 wave vertical for 40m - Pictures and assembling description of a homebrewed vertical antenna for 40 meter band by ON7AMI

80 Meter Pizza Pan Antenna - This is a resonant, half-wave, vertical antenna. It takes up little space in the back yard, was designed for operation on a single frequency 80 meter PSK net, and is reasonably inexpensive to construct by Chuck Hines, K6QKL

VHF/UHF Wideband Portable Dipole - A portable dualband dipole robust and compact antenna usable for horizontal and vertical polarisation by ON6MU

Vertical antenna for Vacation - Vertical Vacation Antenna for 80, 40 and 20 Meter-Band, by Herbert OE3BMB This antenna is a full size λ/4 for 20m and 40m band, and a shortened λ/4 for the 80m band. Generally on the 40m band the SWR is under 1,6. In 80m and 20m band at the resonant frequency the SWR is about 1,1.

HF Vertical antenna on a magnetic mount - A portable hf vertical antenna setup on a magnetic mount by I1UWF

Homebrew Pac-15 Vertical - This page shows a homebrew vertical antenna based on the Pac-12 antenna design.

Vertical vs Horizontal antenna separation - Isolation vs antenna separation an interesting article by WA6ILQ

Radiation Characteristics - Tailoring Patterns for HF Verticals

VHF/UHF Folded Diplole - This is a two element colinear design for vertically polarized radiation. It may be constructed for use on either 2m or 70cm

Vertical trapped antenna - An HF multiband trapped antenna in french

Phased vertical antennas - Phased vertical antenna system in french

G8JNJ Broadband HF Vertical Antenna - G8JNJ Broadband HF Vertical Antenna - Requires no tuner - great results from 40m to 10m plus 80m & 6m with reduced performance

K5DDJ's 10 Meter Beacon - Operating 24/7 on 28.2485 Mhz transmitting 500mw into a 1/4 wave GP vertical antenna. Location is in San Antonio, Texas

ZS1J/B - 28.2025 MHz. 5 Watts output to a half wave, end fed, vertical antenna.

VA3GRR - Radio Beacon - VA3GRR is a radio beacon, operating on the 10 meter amateur band. Its frequency is 28.205.5 MHz. It runs just under 5 watts of power into a vertical half-wave ringo style antenna

W5RTX Beacon - 10 Meter Beacon on 28.259 mhz. 15 W into 1/2 wave vertical.

Operating NVIS - Near Vertical Incidence Sky Wave (NVIS) Propagation, PPT presentation by Marc C. Tarplee, Ph.D. N4UFP

Near Vertical Incidence Skywave - NVIS definition at Wikipedia

LCLAYOUT drawing software - Simple inexpensive program that allows L-C filters designed by PCFILT or S/FILSYN which are to be built using air wound inductors and single layer capacitors cut from alumina or duroid substrate materials