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Online javascript antenna calculator designed to give the critical information of a particular beam antenna, in this case a seven element Yagi, for the frequency chosen.

3 to 30 Mhz antenna analyzer schematic by YO3DAC / VA3IUL

CQiNet is a family of programs that combine Ham Radio with the Internet using Voice over IP (VoIP) technology. Two programs are currently in the family, "theBridge" and echoLinux. Thebridge is a iLink/EchoLink compatable conference bridge that runs under various versions of Unix as well as Windows. EchoLinux is a EchoLink client program for the Linux operating system.

The best way to describe a go-box is a complete amateur radio station in a box. An example is described in this article. The project describes building a portable amateur (ham) radio station, known as a "go-box," housed in a durable orange Pelican case. The go-box contains all necessary radio equipment except for external power and antennae, which are carried separately. It includes items like a Yaesu transceiver, power supply, antenna tuner, speaker, and a clock. The case is designed for mobility and visibility, with a vertical layout to allow in-vehicle operation. Future upgrades might include cooling fans, an LED lamp, and built-in antennae for better functionality in various conditions.

How to solder PL-259’s compiled by K1VR

SerialKey is a Freeware DOS Morse code keyboard that uses the serial port, by Jeff Rowberg (KF6RLU)

Faqs on six meters band, designed to help encourage hams to use and enjoy this band

Simple, easy to built match developed in 1995 for Yagis with resistitive loads of 12.5, 18 and 28 Ohm.

An interface for amplifier to TS-850S

The DSP Satellite Transceiver is a conceptual transceiver designed as a dedicated unit for amateur satellite operators. The initial concept was brought about by the lack of satellite functionality on modern amateur radio transceivers, and the specialized requirements of the ham radio operator who utilizes OSCAR amateur satellites.

Advanced QRP Low Cost Mosfets HF Linear Amplifier with schematics, IMD, gain data and more. Six articles about amateur radio.

Gpredict is a satellite tracking program for Unix-like operating systems. In the begining (v. 0.1.x) Gpredict was just a GUI client to John Magliacane's excellent satellite tracking program, Predict, but due to performance problems it has been decided to include the tracking code directly into Gnome Predict (v. 0.2.0 and later).

A model of a Guanella 1:1 VHF choke balun using a FT140-61 core

Winding Toroids can be a real hassle for those of use who are left-handed or not so dexterous as we once were.

This article proposes a lossy transmission line model of a practical Guanella 1:1 balun that is effective for all frequencies within and immediately adjacent to the pass band

"You tap on computer keyboard in Morse; what you tapped appears as letters on screen."

This program will run all possible combinations of every transmitter against every receiver in its list

The purpose of this page is to capture and document the Yaesu FT-101 series radios during the 1970's

US national radio amateur civil emergency service web site

Iambic keyer with simple paddles and simple electronic circuit.

Match & display imped of antennas, can graphically visualize and compare two sets of measured impedances simultaneously.

Amateur radio programs to download, locator , log, etc... for Psion Aprs maps for PC (ui-view)

An online audio signal generator application capable to reproduce different waveforms with variable frequency range

I4FAF etrode Tube Linear Amplifier experience

This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.

PocketPC freeware that track satellites, and display their position on a map of the world. It also has a display that shows other relevant information useful to Ham Radio operators to allow them to work them.

Quagi 8el 70cm improved 13.77dBi by IK1HGE

Ham radio related catoons

Here you get pages with TELNET and HYPER links to all DX-Cluster Nodes in a graphic manner.

Enables out-of-band transmit for 1.6 MHz to 54 MHz, Improved VHF recieve mod, other band expansions

VHF, UHF page, technical articles, projects, datasheets

ON6MU Optimized 10 and 6 and 4 element UHF Yagi Antenna

Includes links and documentation on wifi antennas, 2.4 GHz Coffee Can Feed Antennas

This article documents an unobtrusive antenna for operation on 7MHz, primarily for contacts with stations at up to 1000Km range.

Smith is a professional Computer Smith-Chart Tool and S-Parameter Plot for windows, special price for hams and students by Fritz Dellsperger

Free CW morse code decoder software for Windows versions : Vista sp2, 7, 8, 10. Decode CW signals with auto tracking features, auto detection of speed

OE1MWW monopole antenna made with common RG 58 or RG 213 coaxial cable

This little antenna is cheap and easy to build, lightweight, and very functional on 2 meters and 70 centimeters by NA4IT

W0OXB All-band Centerfed Zep Antenna 160m-6m

DX listening and broadcasting news

Why Multi-band Dipoles Need HEAVY Open Wire Line by Tom, K1JJ

Answers to frequently asked questions for newcomers to the sport of amateur radio contesting.

RadioQTH Amateur Radio Vanity License Search: This site shows vanity call sign requests filed with the FCC, when call signs will be available for vanity applications and other useful tools that will help in the search for the perfect amateur radio vanity call sign.

A 1:1 to 4:1 switchable balun by N1LO

This antenna can be made in a couple of hours and involves a fair amount of measuring, cutting, bending, and bolting metal.

RF Choke to prevent hf currents on the feedline. This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.

A Versatile Innovative Portable Multi-band Tunable Antenna can work HF VHF and UHF ideal as portable or balcony antenna

Worldwide jFindU d-star repeaters map

ICOM IC-706MKII out of band Xmit Modification

ON6MU optimized 6/9 element vhf yagui antenna with antenna schematic plan and pictures of homebrewed samples.