40 windom

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

40 Meter Delta Loop - Vertical height of the loop antenna itself is 34 feet 3 inches resulting with the bottom 60 feet 9 inches above ground project by K9IMM

40 Meter Rotatable Dipole - An excellent all-around 40 meter antenna for those who don’t have room for a yagi by K6IF / W6BDN

Vertical Antenna for 7 MHz - DF9CY experience on a vertical antenna for 40 meter band

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

Do it yourself HF2V - HF2V dimensions for all the coils and capacitors. Make your own HF2V antenna with 160 80 40 and 30 meters kits by OZ9AEC

The Versatile Vee Beam - An aerial that you can use on all eight High Frequency amateur bands (80, 40, 30, 20, 17, 15, 12 and 10m) with an antenna tuner, and which gives significant gain on the five bands from 20 m to 10 m

FC-40 Auto tuner modification - Extend the tuning ability of the Yaesu FC-40 auto-tuner, by VK7JJ

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

BARTG PSK31 Award - As part of its 40th anniversary celebrations, BARTG announced the BARTG PSK31 Award.

Moonraker 4 Antenna manual  ^updated - 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.

Codec2 - Codec2 is a open source low bit rate speech codec designed for communications quality speech at around 2400 kbit/s. Applications include low bandwidth HF/VHF digital radio.

HERALD P2P radio link design - Sw tool to design point-to-point multi-hop microwave links and networks, 400MHz to 58 GHz. Site/Hop Configuration; Customized Antenna & Radio Equipment Libraries; Link Budget; Path Profile Analysis ,clearance, reflections; import path profiles from SRTM maps, free download.

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

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

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

A 40 meter QRP Transceiver - A 7 MHz homebrewed QRP transceiver project with full schematic and detailed pictures by DL5NEG

Signal Source for AO40 mode S - Signal source circuit for 2.4 GHz by sv1bsx