ground plan

2 meter 1/4 wave Ground Plane - 146 Mhz quarter wave antenna plan

6 Meter 5/8 Wave Vertical Antenna - The G3JVL 6 Meter ground plane vertical is a compact antenna that is ideal for portable operations. If needed, it can be disassembled into a very small bundle no longer than the longest element.

High impedance baluns - Introduction with some background on balun types

5/8 Collinear antenna  ^pop - A 5/8 wave stacked j-pole antenna plan

Eliminating TX RF Feedback Problems - Malfunction of transceivers due to stray RF pickup is a common problem, especially when using end-fed antennas, high-impedance feedlines, or a poor ground counterpoise

Helix antenna for 2 meters  ^pop - Plan of a helix antenna for 2 meter satellite use by VK5ZAI

2 Meter Jpole by KG4WOA - Excellent jpole antenna plan with contruction details and pictures

UA1DZ antenna - description and chart - HF 4 bands (7-14-21-28) vertical antenna plan

Common vhf amateur radio antennas - Plans and drawings of common amateur radio antennas, like jpoles, copper cactus, super jpole, omnidirectionals and quads

Freebanders antenna systems - Yagi Quad's and Verticals simple explanations about freebanders antenna systems

DXCal DX Calendar - This is DXCal - a DX Calendar. The idea is quite simple, DXCal is a calendar where hams can adds all the DX events that are planned.

K8ND SO2R Resources - Ideas and notes on designing a SO2R radio shack room. Includes lots of radio shack pictures used by K8ND as ideas to plan his new radio shack, with contesting in mind.

DX Cluster Using the Internet - For those of you not familiar with the DX Cluster, a word of explanation by Martyn G3UKV

ARRL US amateur radio bands - Color US ham radio band plan in pdf format edited by ARRL

MTM Scientific Radio Loop Antenna - Loop Antenna Starter Kit contains detailed plans for building the MTM Scientific, Inc. loop antenna from scratch.

Planet headset - Quality communication accessories for motorola, icom, kenwood and nextel radios

WM2U's PSK31 Page - An interesting article on PSK31, includes informations on interfacing to sound cards, troubleshouting, list of psk31 softwares and some historic backgrounds.

What is QRSS - A Definition and Explanation of the term "QRSS"

Tower - Windows program for analyzing vertical antennas. This program shows the resistance and reactance to be expected looking into a cylindrical metallic tower over a perfect ground. It gives a useful approximation of the values to be expected in a real-world situation.

G4FGQ Antenna programs - Lot's of antenna planning software mainly in dos version by G4FGQ.

Aether - Aether is an ham radio logging for the Mac. Aether gives hams logging software that is as powerful, easy to use, and good looking as the operating system it runs on. Designed from the ground-up using Apple’s Cocoa, Aether supports the latest Mac OS X technologies, and provides the experience that Mac users expect.

WinTick - WinTick is a utility program aiming at synchronizing the PC clock to Universal Coordinated Time (UTC). It was originally developed for accurate satellite tracking, running on the taskbar while a NASA-compliant tracking program (SGP4 or SDP4) is running in the foreground.

YU1AW HF Power Amps - 2xGU84B and 1xGS31B hf power amplifier plans

A good regenerative receiver - A good SSB-CW-AM regenerative receiver with a fine tuning by moving the wooden stick with a grounded piece of PCB towards the coil.

CAT & audio interface - Schematics and plans to build a custom CAT and audio pc interface