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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.

Better Feedline Loss Measurements with Antenna Analyzers - Various publications through the years have shown how the SWR measured on a shorted (or open) feed line can be used to calculate feed line attenuation

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

Speedometers SWR Meters and Smith Charts - Have wondered why a Smith chart has such strange grid lines. Believe it or not, there is a logical progression from Speedometers to Smith charts that will make the Smith grid crystal clear.

Old Radio Parts - Vintage and reproduction electronic parts specialist - Antique radio dials and knobs, 1940-1970 era phonograph cartridges, needles, idler wheels.

DRCG DL-DX RTTY Contest group - Dl-dx rtty contest group

K8GP Delmarva VHF and Microwave Society - K8GP web site, home of the Grid Pirates Contest Group.

Connecticut QSO Party - Candlewood Amateur Radio Association is sponsoring the annual Connecticut QSO Party

International HF Grid Location Contest - International HF Grid Location Contest

DRCG: DL-DX RTTY Contest - DL-DX RTTY Contest Rules Sponsored and organized by DL-DX RTTY Contest Group

DJ8QP contest station - Also known as 4L9VB DN1MQP DL0TU DB0JT/B DQ2006C

W9BPT Palisades ARC - This club originated in the mid 1950’s with a small break in the late 50’s early 60’s and a rebirth in the middle to late 60’s.

K5QHD Garland Amateur Radio Club - Family friendly Ham Radio Club

KC9KQ Hidden Valleys Amateur Radio Club - The Hidden Valleys Amateur Radio Club is a small friendly club located in the hills and valleys of Southwestern Wisconsin.

HA1YA Mechanics & Electronics Inc. - Specializes in manufacture of middle and high power RF decks and high quality linear amplifiers with metall ceramic tubes for HF, 6m, 2m and 70 cm bands. Transverters, power supplies and control units

QTH locator with GoogleMaps  ^pop - Laurent Haas F6FVY a nice QTH Grid Locator point and click interface using Google Maps.

NashvilleAPRS - NashvilleAPRS is a website designed to help APRS users in Middle Tennessee have a single, knowledgeable resource on APRS in the area.

Lego Paddle - Lego MindStorms Iambic Keyer and Paddle Project by N9SSA

Funktechnik Dathe - Hauptseite

TubeCalc - Input (grid or cathode) and output (plate) tube resistances calculation according to its electrical characteristics, frequency, mechanical dimensions and working conditions.

Pizza - This program allows both great-circle (polar) and rectangular projections of the world. The great-circle map is centered on any specified latitude and longitude (the "home" location). The rectangular projection is shown with the home longitude in the middle of the screen.

Wireless Field Day Log Program - A reliable logging system for Field Day based on wireless networking. Freeware, runs on macintosh, linux and windows

DL9VF Exam Trainer - Franks US license exam trainer, a PC program to prepare yourself for the written test (element 2,3 and 4) of the amateur radio exam performed by the FCC/VEC

A low cost dummy load - This article describes a low-cost, low-to-moderate power dummy load, which presents a 50-Ohm resistive load from HF through 440MHz.

Kenwood TS830S Survival Guide - Excellent collection of TS 830S documents collected from the web and other sources by DL9AI, PDF File