Vertical Dipole ArrayA simple and awesome wire monoband antenna, very usefull for portable and dxpeditions usage, consist of two elements, a driver and the reflector. This endfed halfwave gives a very low take off angle and is very suited for chasing DX.
1:49 TransformerThis 1:49 transformer is used with wires any multiple of 1/2 wavelength. This is not a matching network, it’s a wideband transformer and it has some advantages compared to LC matching
PSK Express PSK Express is a replacement for YGPSK, it is multi-mode and will allow you to use PSK, RTTY or MFSK at various speeds. Requires .Net framework and run under windows, freeware.
A Portable 75/40 Meter NVIS Antenna This article describes a 75/40 meter NVIS, but one could use the construction techniques to build just a 75 meter or a 40 meter version.
N Type connectors over SO-239 at VHF/UHFHow much better is an N over SO-239 at VHF/UHF, a discussion topic at eham
Multiband trap antennasDetailed analysis of multiband trapped antennas with references on efficiency, height above the ground, feed lines and total length
Yaesu FT-857 CAT Controller Free windows basic and simple CAT program specifically for the Yaesu FT-857 radio. It provides an unlimited memory storage area which resides on the client side.
SIM PSK 31SIM PSK 31/63 (Integrated Structured Message BPSK31) is a digital mode based on BPSK that use a structured predefined coded format to send messages, windows free software developed by Nizar Ben Rejeb
CQ machineA voice keyer for field day or general portable operations made with the DH8BQA cq machine kit