simple 4:1 balun

Build a hanging dipole for two metres - Described here is a simple omnidirectional, vertically-polarised dipole for two metres

W1ZY 40 meter moxon antenna - W1ZY's 40 Meter MOXON is the product of 9 months of experimentation. The final array is reversible and constructed from No. 12 insulated wire fed through two RF current baluns

Making a simple current balun - Baluns using ferrite rod and ferrite ring by M0SCG

TH6 balun replacement project - VE7AVV replace balun on a TH6 antenna

Low cost 1:1 balun - A balun don't depend on use of ferrite beads, but use steel wool to attenuate any RF on the outer braid

The Simple Collinear - Wherever there is a need for a vertically polarized omni-directional antenna with gain, a collinear is used. The vertically polarized collinear takes the form of two or more half waves in-line and in-phase, resulting in an omni-directional pattern with maximum radiation near the horizon.

Folding the Dipole - Invented by Heinrich Hertz in around 1886, the half wave dipole is still one of the most simple and practical of antennas and still very much in use today. It consists of a half wavelength long centre fed conductor

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.

Homebrew 6m quad - Homemade quad for 6m band, simple and cheap project by SA7AKE

Bicone antenna - This antenna is a simple double bowtie biconical dipole design. It was designed as a broadband scanner antenna resonant on the 2 meter ham band.

A Simple But Effective Low-Band Base Antenna - A vertical antenna for Six Meters band

Windom for 80-40-20-10 m - A windom multiband antenna for 80 40 20 and 10 meters band. Include picture for a 1:6 Balun. In french

Windom Antenna with 4:1 balun - The Windom is an Off-center wire multiband Antenna. The old version was fed just by a single-wire connected on 1/3 of antenna's overall length or with an open-line feeder (later versions). Here is another model with coaxial feeder, which is compatible with Solid States - 50 Ohm output transceivers .

Text to Morse converter - A simple text to morse and morse to text online converter

QSLMGR - This simple tool let you handle QSL manager data by ON6DP database by HB9CIC

QTH Locator - QTH Locator is free Windows program to calculate distances and angles between 2 stations, with a data base to handle and store position data (even usable as a simple logbook) and a lot of graphic stuff to display geographic positions. It is capable to display self-made maps or UIVIEW maps also. by dg4mcb

SvxLink - Echo Link client for Linux and general purpose voice services system for ham radio use. The svxlink server consists of a core that handles the connection to the tranceiver. The core can be configured to act as a repeater controller or to operate on a simplex channel

ZS1I beacon keyer - This article describes a simple programmable Morse Code Continuous Wave (CW) beacon keyer for HF, VHF, ARDF and tracking beacons

70 cm Power splitter - A simple accurate power splitter for the 70cm uplink to Oscar 13 by G8EUX

FM Morse Code Keyer - A simple circuit which will generate a 700 Hz tone into any FM transceiver allowing an amateur to practice CW with another amateur on a 2 meter simplex frequency.

500mw CW Transmitter - A very quick and easy way to get on the air is to build a "Michigan Mighty Mite" CW transmitter for 160, 80, 40 or 30 meters. It can't get simpler than this. It has very few parts, costs almost nothing, and it works! Cost estimate $10 by VE6WTF

VK1PK RF Signal generator - 3 to 12 MHz signal generator, simple local signal source

PSK31 Interface - Fairly simple way to interface a computer soundcard to an HF rig to operate PSK31. This interface also works for SSTV & RTTY, and has been tested with a Kenwood TS-140.

The simple man's Spectrum Analyser - An easy to build spectrum analyzer

VHF signal generator - a simple VHF signal generator in order to measure the characteristic of low pass filter.