basic components

Your First 160-Meter Antenna - Notes on building a basic wire vertical or horizontal antenna for 160 meters band by L. B. Cebik, W4RNL

CobWebb multiband folded dipole - It is basically a 5 band antenna comprising of 5 full half wave dipoles for each band - between 10M & 20M, the antenna is also resonant on 6M

Comparator-based RF switch - This is a concept paper, not a constuction article. There are too many variables to propose a one size fits all design. However, this paper should give you the basic idea how to do it

Axial-Mode Helical Antennas - Notes on Axial-Mode Helical Antennas in Amateur Service. Helix Basics, Modeling Issues, and Short Helical Antennas Over Perfect Ground

The G3BGR Magnetic Loop - This ia a home built Magnetic loop antenna which was used by G3BGR, indoors on 7,10 and 14Mhz. The basic idea was in Radcom 1986

Magloop antennas - Article about basic principles of magnetic loop antennas, in portuguese

Verticals. Ground systems and some history - Article gives a good overview of the basics and reflects the accepted wisdom from BC antenna work.

Loop Antenna Basics - Loop Antenna Basics and Regulatory Compliance for Short-Range Radio

Les antennes: antenna theory - A basic antenna theory with final quiz in french

The EZ-Tuner - The "EZ-Tuner" is a homebrew automatic legal-limit antenna tuner that covers all amateur HF bands from 160-10 meters. Using a T-network design and controlled by a BASIC Stamp BS2sx microcontroller, the EZ-Tuner will match at least a 16:1 VSWR for either unbalanced or balanced transmission lines.

C&H Distributing - A stocking electronics distributor. Electronic tubes, military components, asset recovery program, coax and connectors

Trilithic - Broadband instruments, R and microwave components and filters, field analyzers, spectrum analyzers

A basic CW operating manual - Compiled by Dan Stegner KC0OBU from FISTS CW Club member tips, amateur radio morse code procedures

PSK31 Overview - Brief overview of PSK31 and basic operating techniques.

PSK31 Interfacing - PSK31 basics and radio to pc soundcard interface circuits, radio to soundcard, soundcard to radio and pc serial port to radio

Jupiter Condenser - Condenser company, maker of electronic components like capacitors, condensers

RadioPartsStore.com - Online shop for amateur radio parts accessories and components

TWLOG - Twlog is a linux ham radio log program records basic Ham log information. It was writen for day to day logging, not contesting. By WA0EIR

4 x 813's RF Amplifier Deck - This amp project was an exercise in cheap! The design criteria was to use only components in the JUNQUE BOX

NiCad battery charger - A basic nicad battery charger using a single medium power transistor.

Narrow Band-Pass filter for HF - Band-pass filters can be critical components in competitive stations. This setup may help put your station on the map.

500 KHz Low Pass Filter - This article describes a shielded low pass filter with a cut off frequency of about 500 KHz. It is built with components suitable for receiving, and was designed to use in front of a low frequency receiver for LOWFER work.

40 meter QRP Transceiver - This semi-homebrew QRP (low power) CW transceiver is based on the ARK-40 transceiver kit, by S&S Engineering. With its built-in CW keyer and 5 watts of power, the basic ARK-40 transceiver is an outstanding 40 meter CW performer

High Voltage Breakdown Tester - K8CU technical topics article about high voltage breakdown tester necessary for testing of any high voltage components like vacuum tubes, high voltage capacitors, vacuum relay

Oscilloscopes - basic use and measurements - A 12 pages pdf article about oscilloscope use, calibrating, operator controls and tips on making measurements by NA5N