clip art

6 Meter 3 Element Quad - Starting from an original project for a 2 element quad antenna for six meter band, ve7ca presents the dimensions for a 3 element version.

Antenna Baluns: What they are - Baluns what do they do, in a pdf file by W7EL

Antenna Transmatch Tips - Tips on tuning antennas using Antenna Tuning Units also called ATU. This article explains the functions and ills of tuners, along with some guide- lines for building an ATU.

Choke balun  ^pop - Essentially, a choke balun is designed to 'divorce' your antenna from the feed line. if your feed line is coaxial cable then you don't want it to be part of your antenna. you want to be able to deliver all your power to the radiator itself, i.e. 'the antenna'. a choke balun does this admirably

A 16 Turn S-Band Helix - This design represents the smallest practical antenna for Oscar-13 mode-S. Perfect beacon reception at all times is possible, and acceptable SSB even at 43,000 km range.

ARRLWeb: Loop Antenna - Loop antennas articles with restricted access to arrl members

Antenna system in a shopping trolley wally - Multiband portable antenna system edited by Andy Foad G0FTD, consisting of an old cb antenna with it's 27Mhz matching coil, an antenna tuner, car battery and a transceiver

Optimizing Inductors - While intended mainly for antenna loading coils, this article also applies to other resonant systems, such as amplifier tank circuits.

Omega and Gama Matching - Article about omega and gamma matching, related to bandwidth, loss and component failures, heating and power ratings

Biquad Antenna Construction - This page details the construction of a biquad antenna. The biquad antenna is easy to build, and provides a reliable 11dBi gain, with a fairly wide beamwidth.

The Art & Skill of Radio-Telegraphy - A freware book on learning morse-code. The Art & Skill of Radio-Telegraphy Third Revised Edition by William G. Pierpont N0HFF, online version available in multiple languages

Boston Fire Department Live  ^pop - Listen to Boston Fire Department live scanner feed

New York Long Island Scanner Pages  ^pop - New York / Long Island Scanner forums, chat, and live scanner feeds of Nassau County Fire Departments. Site registration is needed to listen to the live feeds

A Little Mobile Information - Alan Applegate (K0BG) article on mobile oprtations

The Mobile Ham Installation - Article on ham radio mobile operation from Andy D. Crouch N5NDD

HFPack - HFpack provides an information exchange about transceivers, antennas, systems, HF packs, propagation, new developments and techniques in HF portable operation. Radio Amateurs are invited to participate in egroup and on-the-air nets around the world.

Motorcycle mobile: 1/2 or 5/8 wave antenna - Article on mobile ham radio antenna setup

Xtal Set Society, Inc - The society publishes several books about crystal radio. Sell crystal set projects, tips for crystal radio design, ham radio kits, radio parts and common radio electronic components

ACK parts - Industrial and Commercial Parts Supply Since 1946

10 W Linear Amplifier - This article describes a 10 watt linear amplifier that is capable of delivering over 15 watts into 50 ohms and uses cheap plastic transistors that are used in CB equipment. by Harry Lythall - SM0VPO

Avoid pitfalls when recharging batteries to ensure long life - Portable design - avoid pitfalls when recharging batteries to ensure long life - secondary batteries can be simple devices, but improper charging can be devastating to the user experience.

ARRLWeb: Batteries - ARRL web batteries articles and web links

Car and Deep Cycle Battery FAQs - Car and deep cycle battery answers to Frequently Asked Questions (FAQs), tips, manufacturer's information, references and hyperlinks are contained on this consumer oriented Web site about car, motorcycle, power sports, truck, boat, marine, recreational vehicle, solar, and other starting and deep cycle applications.

Making printed circuits - To make smart looking PCB's, all you need is a computer, a laser printer, copper clad board, etchant, a clothes iron and some Epson glossy photo paper.

ARRLWeb: Solving Ignition Noise RFI - Solving Ignition Noise RFI article. Help on removing noise interfences caused by ignition