dual gate

Shortened dipole for 10 & 40m bands - A shorten Dual-Band Dipole with overall length of about 11 m. For this antenna traps are substituted by inductors, in order to cover the 10 & 40 m. Bands.

Dual Band 40m/17m dipole - A center feed dual band dipole for 40 and 17 meters by W5DXP

The YU7EF Duo Band Antenna - The original project of a dual band yagi antenna for 50 and 70 mhz, published on dubus 2/2007 by YU7EF

G7CNF dual band yagi for 4 and 6 m - A 5 Element dual band, single feed solution for 4m and 6m built by Nigel Coleman.

Dualband yagi for 50 70 Mhz - PA5DD version of the dual band yagi antenna for 50 and 70 Mhz

Dual band 6m/4m Yagi - This antenna was optimized with the goal to minimize any changes in 6jxx6 impedance/lobes. The result is a 7 el on 70 MHz with a little loss of gain comparing with the other monobands of the same lenght.

An active antenna - Project for QRP operations by George Dobbs G3RJV

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

Dualband EH Antenna - A detailed project of a dual band EH antenna by F5IXU in french

J Pole Antenna - Dual Band (2 Meter/70 cm) Solid Aluminum J-Pole

Dual Band J-Pole - Copper Dual-Band super J-Pole antenna project

Antennas for the Space Restricted - This article shows that it is possible to operate successfully from a confined space with antennas for 2 10 and 80 meters band

G0FTD's experimental INDiX antenna - This antenna is meant to be hung indoors within a window frame for those who can't get an outdoor antenna erected. Plan include dimensions for 50mhz 70Mhz and 144Mhz

Gunnar Olsen Study : Towers Collapsing - This study is of guyed tower failures and collapses to investigate what a typical tower fall radius would be.

Homebrew a dual band antenna for handhelds - A project by DL5DBM for a VHF UHF antenna suitable for handheld transceivers

Amateur Radio Online - Ham Radio Auction Gateway - Ham radio ebay auctions, amazon affiliate bookstore and more

dstar_digital : D-Star * Digital - An International discussion group for D-STAR Digital Amateur Radio. Radios, Repeaters, Gateways, Internet, Setup, Mobile and Portable radios, Cloning Software, icf files,

Chevron Morse Keys - Each key is individually numbered and has been built by either Kevin M0AGA or retired master engineer Alan G4HCD to exacting standards.

A Guide to Test Equipment - That just about sums up many peoples’ attitude towards test equipment. Multimeter, SWR/Power Meter, Dip Oscillator, RF Signal Generator, Cathode Ray Oscilloscope

West NewYork Scanner Guide - The western new york amateur radio and scanner guide by the lancaster amateur radio club in PDF file

MB7ICL Echolink node - MB7ICL Echolink Node Clacton on Sea, Essex The Gateway to the world

AESHAM comparison charts - Compare dual band hand-held transceivers

Yaesu VX-2R Dual-Band Transceiver Review - Usage information and notes compiled by Anthony W. Haukap

Spectrum Analyzer Real-time FFT - Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.

Simple test equipment to build - A field strength meter, a crystal tester and a capacitance meter by Peter Parker VK3YE