Here is a very nice program for graphically processing AIM scan data for presentations: Zplots by AC6LA

Antenna Modeling - An excellent resource on antenna modeling software. Be sure to checkout the program called Transmission Line Details.

Some antenna analyzers for the ham bands:
MFJ Enterprises

AEA Wireless

Autek Research

Palstar ZM30 Analyzer

Reviews of some analyzers

General links:
Spectrogram - Some tips on using Spectrogram for aligning ham receivers and links to several very good Spectrogram tutorials.

W4RNL's Antenna Web Site - L.B. Cebik's outstanding resource on antennas.

EZNEC - A very nice antenna modeling program by W7EL.

Antenna Match Calculator - An interactive calculator to find the values of L & C to match an antenna. Several matching circuit configurations are included.

Speq Math - An easy-to-use program that does a wide range of mathematical functions with complex numbers.

Coax Parameters - A concise list of the basic parameters of many types of coax.

Belden Cable College - Useful information on cables.

Times Microwave - Information on high quality coax.

Top Spice - a very good program for analyzing electronic circuits. The free version can handle circuits of medium complexity. Very useful and very educational. Download file is only 3 MegaBytes.

Ness Engineering - Several good articles on fundamental electronic technology.

Analog Techniques Tutorial - Good tutorials on basic electronics.

Finite Element Method Magnetics (FEMM) - an outstanding free program for simulating magnetics problems. It allows an unlimited number of meshes.

Wiretronics - a good source of wire information.

Eveready Battery Data - technical information on batteries.

An elementary course on electromagnetism and other topics in physics.

A good introduction to DC electronics.

A good introduction to AC electronics.

Magnetism: quantities, units and relationships - A good summary of magnetic terminolgy.

International Rectifier - A good source of information on power transistors and FET's.

Info on Transistor Models - good information on the parameters used in the SPICE transistor model, on the Zetex web site.

Zetex SPICE Models - SPICE models for all the Zetex products are available here.

Complex Number Calculator - A very nice calculator for working with complex numbers. You can put it on your desktop.

Scientific Calculator - a very handy scientific calculator.

Updated: April 2, '04