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An interesting article on loading short vertical monopole antennas, representing six different methods. Base loading, Center Loading, Top Loading, Continuous loading, half and half loading and capacitive top loading.

The X80 is a commercial version of a so-called Rybakov vertical antenna.

Learn how to start using ham radio satellites for your DX contacts, PDF presentation by Dave Long

A short multi-band vertical antenna

A project for a 50 MHz moxon rectangle antenna

The Packet Radio beginners guide to packet radio operating by Buck Rogers K4ABT

The ZS6BKW antenna is derived from the G5RV by Brian Austin G0GSF who developed computer programs that were used in conjunction with Smith charts to calculate the optimum dimensions for his variant of the antenna.

Why all the mystery surrounding baluns ? To use or not to use baluns

In this PDF article Zack Lau describe how to homebrew a four element yagi beam antenna for 50 MHz band, including how to build mounting blocks and tubing clamps to hold elements.

Cabrillo2Adif A software for converting the radio logs from Cabrillo to Adif log format (for Mac OS X)

A comparison of multiband dipoles, including jumpered dipole versus fan dipole antennas, dipole fed by ladder line, resonant dipoles antennas. ARRL lab notes

A simple to build full length 20/40 dipole antenna to be used in inverted vee configuration

An interactive repeater map that uses google maps to display location of repaeter types available in Italy by Andrea IW0HOG

A bycicle ham radio station setup, with full band coverage

Amateur radio videocast, your source for practical technology hacks, mods, and tips. Available on youtube or google video

Heathkit SB-220 Amplifier modification by KE5YA

The RasHAWK team has used a Raspberry Pi as the basis for a networked RF sensor capable of supporting spectrum monitoring, signal intercept and direction finding (DF) operations.

This project produces a sturdy tripod for small vertical antenna support using readily available electrical metal tubing (EMT) or conduit

A trap on the coaxial cable, also known as choke, helps to eliminate the sneaking of the reflected RF- energy to the shack. The trap can be made from the coaxial cable that feeds the antenna

An indeal stealth antenna made by multiple quarter wave verticals, supported by a tree.

APRS web map with weather, telemetry, messaging and a bulletin board. Google Maps and Google Earth views update automatically in real time. 14 languages.

Butternut article on radials usage on vertical and ground plane antennas

Technical supplement with schematics of the Yaesu FT-2800M Yaesu Transceiver

After you have build this antenna, you may not need anything else. This article shows how to build a VHF j-pole antenna and how to protect it by inserting it into a PVC tube, the correct way.

In this article the author describes some new designs of ferrite loaded chokes for suppressing unwanted common mode currents at HF applied to feed lines like choke baluns, but also in the shack, applied to various coaxial, mains and data cables

Schematic diagram of the VLA 200 power amplifier by RM Italy

VHF Power amplifier VLA 200 english manual

A presentation of a HF multi-band sloper antenna. This antenna project is for low band operations, and antenna presented in this article works on 40 80 and 160 meters band. Article is in Polish.

2 transistor transceiver for 28MHz CW

PIC micro controller based frequency counter with LCD readout

Tips on winding wire coils used as inductive loads, traps, band-pass filters, are implemented in a number of amateur radio projects especially antenna projects

This document describe serveral wire antennas, from the folded dipole, to the common halfwave monoband antenna for those who want to make HF portable operations in holiday.

Download the Yaesu VX-8R Cheat Sheet PDF File

70 MHz transverter, 4m band, by G3XBM

Review of Cushcraft MA-5B multiband Antenna after some days of usage.

My Top Five Backyard Multi-Band Wire HF Antennas. A selection of the top 5 HF wire antennas for the backyard and for multi-band operation

Photo construction manual of a portable antenna made with two heavy duty whips by buddipole. In this article has been implemented a 50 MHz portable dipole.

Find out how much to adjust the length of a quarter wave whip or a half wave dipole rather than the outright cut-and-try method.

Printable Quick Reference Card for Yaesu VX-7R

Project for DXers and experimenters alike. An old article publishes by 73 Amateur Radio magazine in PDF format, where all the components required to build your own HF spectrum analyzer may be found in a well-stocked junk box.

Trap-style Inverted-V Antenna for 3.5, 7, 14, 21 & 28 MHz

The Burnham Beaches Radio Club frequency counter is a PIC micro controller based frequency counter with LCD readout. It can be used stand alone or the in built offsets allow integration into a receiver

W5UXH version of OZ1JHM Morse Code decoder project

A home made 4:1 Ferrite QRO Bal-un with a FB 241-61 Type K

Building a Windom HF Antenna. A PDF file presentation about homebrewing a windom antenna for the HF bands with formulas for 40 and 80 meters bands and step by step guide on making a 4:1 balun to feed the antenna.

Quarter wave groundplane antenna for 2 meters FM by AA1PG

An interesting article on guanella baluns that cover several aspects of homebrewing 1:1 and 4:1 current baluns by KN9B

Repair LDF Z-100 toroid by VK4ADC

Diamond W8010 Multiband Dipole Modifications

Skin effect and proximity effect on making coils with stranded wire. An interesting comparison on making coils.