5/8 ground plane

The ground image vertical antenna - A 20 meter quarter wave vertical antenna by jerry sevick W2FMI QST Article

NVI 40 Meter Antenna Modeling - The idea of using a low mount dipole, enhanced with reflector wires directly beneath the dipole, on the ground, appears to be a very good approach to creating an NVI specific antenna for local HF operation.

Quarter Wave GP Antenna Calculator - Amateur quarter wave ground plane antenna calculator

Feeding an End-Fed Antenna  ^pop - End-Fed antennas are NOT balanced systems; but neither are verticals, ground planes, discones, windoms, zepps, Marconis, half-slopers, et al. Additionally, the low-impedance antenna port of your transmitter/receiver is not balanced.

K5OE, Introduction To Amateur Satellite Ground Station Antennas - There are many kinds of satellite antennas that will get you on the birds and allow you to have lots of fun

The Small Loop Project - AM loop antenna for 75/80 meters band

Effects of Very Large Ground Screens - A theoretical and experimental study of the effects of very large ground screens on 20 meter verticals

Quarter Wave Verticals - One of the most useful antennas in the repertoire is the Marconi or quarter wave grounded vertical antenna. Its invention made it possible to halve the length of antennas, simplifying communications, especially at HF and below.

Antenna & Ground Help - Radials & Counterpoise

Ham Radio Tower at NØHR - Ham Radio Tower Project at N0HR. Includes site plan, escavation, tower construction, HF antennas, grounding and lightning protection, coax and more.

The Balcony Bender Antenna - Add ground planes to your Balcony Buddy

3 Element Yagi using Hamsticks - A 3 element minibeam yagi using hamstick for 20 meters band

VU2ACX blog - VU2ACX - A ham blog and personal site from India

Yuma Hamfest & Electronics Expo - Yuma County Fairgrounds, Yuma AZ. On site RV/camping facilities. Seminars, Exams, Tailgating.

TW Antennas - Portable multiband HF antennas. The Traveler provides 5 band, omni-directional communications in an easy-to-assemble package that requires no radial ground system or towers

AO-7 Logbook Site - Resource for those who are actively uses the Amateur Radio Satellite AO-7

ECHO (AO-51) - SpaceQuest, Ltd. - Spacequest ltd. is a leading developer of advanced micro satellite technology, specializing in the design, development, and testing of space and ground components for operation with low-earth orbiting satellites.

PlanePlotter - PlanePlotter receives and decodes live digital position reports from aircraft and plots them on a chart. Using PlanePlotter, you can see a radar-like display of all those aircraft around you that are transmitting the appropriate digital messages including ACARS, ADS-B and HFDL.

Ameritron AL-1200 to gs35b Conversion - The Ameritron AL-1200 Amplifier is in current production. In its factory configuration it uses a single 3CX1200A7 (triode) tube, grounded grid configuration. Re-tubing the AL-1200 with a GS-35b with success.

W2DTC Homebew RF Amplifier - Grounded grid, Cathode driven, 3CX3000F7 Triodes

Grounded Grid Amplifier - Picture of a power amplifier, made using of GI-7B triodes by Bob Briggs, VK3ZL

Lightning Safety & Power Quality Issues - LightningProtection: Lightning Safety & Power Quality Issues. A moderated professional forum by recognized experts, for accurate technical information on lightning, surge and grounding information.

The Ufer ground system - A new look at the Ufer ground system by Chris Scott

Atlas of Ground Conductivity - The ITU-R World Atlas of Ground Conductivity in PDF

Safe,effective grounding - Practical applications for end-fed antenna transformers and safe, effective grounding