40 metre

A 10 metre EH Antenna - An EH Antenna for 10 meters by Lloyd Butler VK5BR

Quad Antenna System by Pfeiffer Maltese  ^pop - Excellent Quad Antenna projects for 40 20 17 12 10 and 6 meters band in this pdf file project by Pfeiffer Maltese

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

40m & 80m portable wire antenna - G8ODE antenna project, where the 40m & Short 80m antenna was deployed as a sloping wire antenna using the 10M fibre glass fishing pole and a hook on the house's gutter-board

Vk5BR 20-40 Metre EH Antenna - VK5BR article on home brewing your own EH Antenna for 40 meters band

Mag Loop for 40 m - ZL1BJQ magnetic loop antenna for 40 meters band

Trapped dipole for 80 40 20 - A multiband trapped dipole for 80, 40 and 20 meters band by ZL1BJQ

Handi-tenna 440 Beam Antenna - KG4IHJ 4 elements handitenna for 70 cm

Dual Band Quad Antenna - 4elements 50Mhz and 70Mhz dual band OWA Quad Antenna with a 2.7 metre length boom by G0KSC

Duoband DK7ZB-Yagis 2m and 70cm  ^updated - These Yagis cover the range of 144-146MHz on 2m and 430-440MHz on 70cm. They can be used for alle modes (FM and SSB/CW). On both bands the SWR is good across the whole band.

H40FN - DX from TEMOTU from February 06th - 19th QSL via HA8FW

RFTec - Coax Cables and Connectors, DC to 40 GHz RF cables & test cable assemblies, surge protectors, SMA connectors, adapters and termintators

Moonraker 4 Antenna manual - English manual of the AV-140Moonraker 4 antenna

Cushcraft R7 Manual - Manual for R7, 10 12 15 16 20 30 40 meters band antenna

HF Multiband vertical antenna selection - Comparison chart between Cushcraft R8, Hy-Gain AV640 , Butternut HF6V, Gap Titan and Eco 7+

Radio London Ltd - This site, run by Radio London Ltd, is dedicated to Radio London -Big L (1964 - 67), the Big L Fab 40 charts, 60s Offshore Radio and Music.

400 W RF Power amplifier for 144 MHz - G4DCV's 144MHz amplifier with a pair of GI-7b Russian triodes

Homemade CW key for Practice - Video of an homemade morse code key for practice

40A-13.8V Switching Power Supply - Ever want a really big power supply that can handle all your 12v needs around the shack ?

The Rock-Mite CW Kit - The Rock-Mite is a 40m CW kit offered by Small Wonder Labs . It features built-in keyer, direct conversion receiver with a crystal RF bandpass filter, 500 milliwatts of power, and switchable frequency offsets to work around QRM

40 meter QRP CW transceiver - Home made QRP CW transceiver for 7 MHz by JF10ZL

Homebrew 30m CW Transceiver - 10.100 - 10.140 MHz 3 Watts output by 7n3wvm

40 QRP CW Transceiver - Amateur Radio (G3TXQ) - Malta 40 QRP CW Transceiver

Receiver Dynamic Range - Receiver dynamic range is the ability of a receiver to receive a weak signal without loss of readability while a strong signal is present.

40 m Band Direct Conversion Receiver - Practical and usable direct conversion receiver for the 40 m CW band