simple 4:1

Simple 160m vertical antenna - A Simple vertical antenna project for the 160 meters band by Peter G8CVF

G3YXM Small Loop - This simple antenna is capable of remarkable results on 160, 80 and 40 metres. Forming a triangle from around 50 feet of satellite TV coaxial cable, the top of the triangle can be as low as 15 feet, and the lower side just high enough to prevent a passer by hanging themselves

Double-L Antenna For 80 and 160 - A vertical antenna for 80 and 160, fed with a single feed line that is simple, effective, and requires no ground system.

KN5L Field Day Vertical Antenna - This Field Day Vertical Antenna project is the result of many years of attending various field day sites and realizing that what was needed is a simple, easy to assemble vertical antenna.

Dipole for 40 Meters by K4VX - Here’s a very simple and practical way to make a short but efficient 40-meter dipole. The K4VX Linear-Loaded Dipole for 7 MHz

7 elements 50Mhz Yagi Antenna Priority listing - A very simple to build, compact 7el 50MHz OWA requiring no complex matching and flat SWR across the bottom of the 6m band

70 cm Moxon - 70cms Simple Moxon 2 elements antenna

The Dual-Ferrite-Bead 4:1 HF Balun - A pdf document about the dual ferrite bead 4:1 balun, some preliminary measurements

Homebrew a Half-Wave Dipole Antenna - If you own a soldering iron and a few simple tools, you can build and erect your own half-wave dipole antenna in about half a day.

Helical Antennas - The Helical antenna description, a simple way of obtaining high-gain and a broad band of frequency characteristics

Simple Wi-Fi Yagi - Simple Wifi Yagi antenna for under $10

The vertical Double-Zepp - The vertical Double-Zepp 2x7 m is a very simple, effective 8-Band-antenna. The end of the Dipol must be 5-10 m above the ground

Roger G3XBM's Amateur Radio Blog - Simple QRP projects, 10m, 6m, WSPR beaconing, sub-9kHz and other random stuff

KC7ZRD The North Valleys Simplex Group - This group is located just north of Reno, Nevada and primarily uses simplex frequencies.

Tiny Trak & eTrex GPS - Tiny Trak is a simple choice for tracking, simply by using a usual VHF and TinyTrak as APRS modem.

Repeater Range Android App - M3OYQ’s Repeater Range is a free application designed to run on the Android mobile phone platform. The the app listens to the onboard GPS and displays the bundled repeater database as a simple list sorted by the range.

Signals - A quick and simple reference to various communications signals, such 10/11 Codes, Morse Code, Phonetic Alphabet, Police Color/Penal Codes, Q-Signals.

NCDXF Beacon for Android - NCDXF Beacon is a simple tool to monitor the NCDXF beacons on the Ham Radio bands 20m, 17m, 15m, 12m and 10m. Upon start the the time will be synchronized with an NTP server.

B-Log - B-Log is a very simple, free-form logging program that offers useful features for the shortwave or scanner hobbyist, including SWBC listeners, AM-BC listeners, utility listeners, and amateur radio operators. The program is both simple to learn and use, and very powerful

Speech Intelligibility - Articles published by the Radio Society of Great Britain, basic principles, construction of a simple equaliser circuit

A lightening arrester idea - A simple lightening arrester by G8NQN

Antenna pre-amplifier for 10 m - A simple & effective antenna pre-amp for 10m. Band (28-29.7 MHz)

QRP Tuner Plan - A Simple and Flexible Tuner for QRP Craig LaBarge, WB3GCK

Simple Regen Radio for Beginners - The Regen Shortwave Receiver using Manhattan-style ugly construction techniques.

Simple Interfaces for FSK, PTT & CW Keying - AA5AU FSK and CW interfaces