40 windom

Cubical quad 4 elements for 28MHz - Quad antenna for 10 meters band in french by F6ITS

40/80 Coil loaded dipole - A coil loaded dipole antenna for 40 and 80 meters band by I2CN

Dual Band Dipole 20-40m - A simple dipole built for two-band operation can be used for portable use and operate 20 and 40 meter bands

2 element 40 meter reversable quad - A reversable quad antenna for 40 meters band by N4JTE

Phased 40M Wire Verticals - Experiments with phased wire vertical antennas on 40 meters at VA7ST

Rotatable 40M Dipole - The Linear-Loaded "Crappie" 40M Rotatable Dipole A Short 40 Antenna You Can Build for $50 or Less by VA7ST VE7ASK

40 m linear loaded dipole antenna - The K4VX linear-loaded dipole for 7 MHz, simple and practical way to make a short but efficient 40-meter dipole.

W1AB Killer Antenna - An elevated ground plane sized as a 40 meter antenna but fed with ladder line and antenna tuner for hf and 160 meters.

Slink-ette antenna - A Slinky-based doublet or loaded vertical QRP antenna tested for 40 meters band by N2CX and N2EI

6 Band Wire Antenna - This antenna article is geared towards new Hams and antenna builders looking for a very inexpensive 6 band antenna that can be efficiently fed with 50 ohm coax without a tuner by N4JTE

W3DZZ 80-10 meters - W3DZZ trap dipole for 80 through 10 meters

Converting a Sky TV Dish to 60 cm band - Modify an Analogue Sky TV Offset Fed Dish for AO-40 S-Band

A Brolly Dish for AO-40 - A umbrella dish. Portable high gain antenna for AO-40

Sloper antennas  ^updated - HB9TQF sloper antenna notes, setting up a multiband trapped half sloper antenna for 80 and 40 meters in italian PDF File

Outdoor 40 Meter Stealth Dipole - Just a basic dipole, under the edge of roof.

G8ODE W3DZZ Antenna - W3DZZ multiband antenna for 80-40-20-15 and 10 meters band

ZK2V - DXpedition to the island of Niue (OC-040) 16th May 2009 until 20th June 2009

WebSDR in USA K7UEB - WebSDR at K7UEB,40 and 20 meters receiver in Walla Walla University USA

Tecom - Tecom industries product line encompasses a wide range of highly sensitive active and passive antennas for use in airborne and ground applications, providing complete coverage of the 20 MHz to 40 GHz frequency range.

Receiving the AO-40 Beacon - G6LVB beginners guide to receiving the AO-40 beacon

Kenwood TH-25 TH-45 Manual  ^updated - 144 Mhz, 430/440 Mhz FM transceivers manua, zip file.

Kenwood TH-D7a TX band modification - Allows TX 136 - 173.995 and 400 - 479.995

Low Pass Audio Filter - 440 Hertz peaked low pass audio filter experiments

50 Ohm Oil Filled Dummy Load - N4SPP home built 400 W ham radio dummy load project

2 m 70 cm Diplexer - A 2m/440 diplexer