11element plan

KG4JJH Moxon Antennas - A Moxon rectangle antenna projects for the 6 10 15 17 and 20 meter band but include drawings, plans, statistics and homebrewing statistics.

20 Meter Ground Plane Vertical Antenna - This is a ground plane antenna for 20 meters with an imput impedance of 50 ohms

11elements yagi for 70MHz Priority listing - Low Noise 4m LFA Yagi. No matching needed, flat SWR across the band. Ideal for field day etc. Serious gain and F/B by G0KSC

Vertical antenna for 50 MHz - 5/8 vertical groundplane antenna for six meters band

Bent Dipole with gain - Bent dipole plan by G8MNY

Hentenna Applications - Plans and measurements to build the Hentenna antenna for HF bands and for the 6 meter band

Hentenna for the 6m band - An Hentenna plan for six meters band

Hentenna by IW3HZX - Hentenna plans and pictutes for HF and VHF UHF Bands in italian by IW3HZX

J-pole antenna for 915MHz - A 915 MHz four bay j-pole antenna plan

Copper Pipe J-Pole Antenna - A fixed j-pole antenna plan for 144 MHz and 430 MHz

G4RV Antenna - An 80 to 10 meters multibad wire antenna plan by Maidstone Amateur Radio Society

EWE Shortwave Antenna - What is an EWE Antenna, comparisons, performance and homebrew plan

The EWE Antenna - EWE Antenna plan with a 9:1 balun

The Optimum 6 Element Yagi-Antenna - A 70cm and 2m 6 elements yagi antenna plan based on the IEEE Transactions on Antennas and Propagation

Cushcraft Trap - Coaxial Capacitor Repair - Repairing coaxial capacitor on cushcraft trap. Parts are no longer available from the manufacturer, home repair is the only option.

A92IO Bahrain - A92IO is now operational from Sar, Northern Region, Kingdom of Bahrain, LL56fe. Plans are to operate from Bahrain till at least August 2011.

HF BandPlan by RAC - Canadian HF Bandplan by RAC in pdf format

USA Amateur Radio HF Band Plan - PDF with USA Amateur radio HF band plan and common country prefixes updated in 2008 by Icom

GB Antennas and Towers - Dutch Antenna and Tower Manufacturers from Slimline Square Triangular Round Towers. Antennas production include Yagi Monoband/Dipole/HF Quad /50MHz and 70MHz Yagi-Quad, VHF-UHF yagi-Quad and Comby antennas VHF/UHF/SHF

New York Repeater Directory - It origionally included NYC Metro and Long Island, but has expanded to cover all of eastern New York as well. Future plans include expanding to cover all of New York state. The listings are a reflection of each repeater's true status, regardless of their coordination

Explanations of LDE - 15 possible explanations for Long Delayed Echoes by University of Oslo

Magnetospheric ducting as LDE cause - LA3ZA on magnetospheric ducting as an explanation for delayed signals on 3.5 MHz

PExprt - Tool for magnetic component design and modeling. Design and modeling of magnetic components such as inductors, planar transformers and integrated magnetics used in power-electronics applications.

CHIRP - CHIRP is a cross-platform, cross-radio programming tool. It works on Windows and Linux and MacOSX. It can program many popular radios and exchange data between them includin Icom Kenwood Yaesu Alinco Wouxun Puxing Baofeng

OZ2CPU digital wattmeter - Plans and hex code for an RF wattmeter based on an Analog Devices AD8307 log amplifier.