40 metre

Shortened dipole for 10 & 40m bands - A shorten Dual-Band Dipole with overall length of about 11 m. For this antenna traps are substituted by inductors, in order to cover the 10 & 40 m. Bands.

160 meter linear loaded Inverted L antenna - The total length of the inverted L is 240 feet, which is 7/16th of a wave length long. It has a 92 foot horizontal linear load section 1 foot above ground that terminates into a home-brewed parallel network tuner by KN4LF

The Battle Creek 40 80 160 m antenna - 3 Band vertical Marconi-antenna for the bands 40, 80, 160 meters with a ground net of wires as radials.

40M Inverted Vee - This simple antenna can be used in various configurations for 40/80/20 or any WARC band or a combination of them

40M Reversible Moxon - W8EGB moxon project, each side is 51 feet long and the turned in sections are each 7.7ft long. This antenna performed similar to a full size two element yagi for 40 meters.

Full 1/4 wave vertical for 40m - Pictures and assembling description of a homebrewed vertical antenna for 40 meter band by ON7AMI

VE7CA portable tribander yagi - 30/17/12 and 20/15/10-Meter Tribanders and a 40 meters inverted V wire yagi antenna

Multi-Band Super Mini Loop Antenna  ^pop - How to make the Super antenna. To build this antenna you need a lot that is at least 100 feet across. Antenna covers all bands 80-10 meters + 30, 17, 12 meter WARC Bands This antenna works as a Full Wave Loop on 80 Meters and also works as a 2 wavelength open loop or Bi-Square on the 40 Meter band

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

Wire Dipole for 7.05 MHz - Inverted Vee antenna for 40m with simulation data by DF9CY

EH for 40 meters by CO6HK - Article on a homebrewed EH antenna for 40 meters band in spanish

Noise Reduction on 40m Priority listing - DF9CY implementation of W1HIS suggestion of inserting a common mode choke into a 40m antennas feed-line.

Open Wire Feed Line a second look - Put up the longest dipole you can fit, feed it with open wire line, connect it to the balanced output of your tuner and—poof! Instant multiband antenna. Is life really that simple? By Paul Danzer, N1II

The simple 144/440 copper pipe J - Projects by Dale Kubichek, N6JSX

VHF Antenna in a Lunchbox - The magnetic loop on two metres

Large multiband moxon antenna - This moxon antenna resonate on 80 40 and 10 meters, has been used for CQWW 2006 by a YU team project by YU1QT

QRP Antenna 80-40-20-15 End Fed Antenna - A long wire antenna that will load up on 80, 40, 20 & 15 meters without an antenna tuner and without balun coils

G3EJS portable antenna for the IC-703 - A portable antenna for 40 20 15 10 and 6 meters operations to be used and tuned with the Icom IC-703

UHF Yagi for AO-40 - Based on DL6UW Yagi antenna's design-formula The forward gain is 13.6 dBi (about 11.5 dBd) and it's pretty small, about 1,5 m in length

Horn antenna for AO-40 by AA2TX - These notes provide the directions for constructing a Cardboard-box antenna for receiving the AMSAT OSCAR-40 satellite on 2.4 GHz (S-band.) It is constructed from two cardboard cartons, aluminum foil, and packing tape. No coax, connectors, or soldering is needed.

W4INF Hidden House Loop Antenna - If you live in a restricted subdivision, you need to make the most out of it. This loop antenna is balanced line fed and works 40m-10m, does decent on 80m.

Balanced Line Tuner - A small Z-Match tuner, BLT, Balanced Line Tuner is a simple Z-Match tuner that works from 10-40 meters

30m QRSS Beacon Transmitter - This beacon puts out about 0.5W on 10.140MHz. It is intended to be used for Slow Morse (QRSS) operation.

LY1GP software defined radios - TinySDR for 80m band and ZetaSDR for 40m band

50 MHz Receive converter - This is a six metre version of the two metre converter by EI9GQ