A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cables. Many hams connect the center conductor of the coaxial cable to one side of the dipole, and the shield to the other. Wrong!
This is a popular antenna design as the performance is very good across the HF bands and requires little or no tuning. It is a dipole fed off center with a 4:1 current balun at the offset feedpoint. The antenna shown covers 80, 40, 20 and 10 meters with 15 meters and WARC bands
A spectrum analyzer based on ATMega8 microcontroller and a CYWM6935 within a Nokia mobile phone case.
A presentation on designing Near-Vertical Incidence Skywave (NVIS) antennas and all related EZNEC models in a single zip file or the single presentation in PDF File
Software Defined, User Assembled, an Adventure a personal review by W5TOM
CAT and Digital modes interface for the Yaesu FT-817
An home made Halo antenna for the 50 MHz with drawing and pictures in German
A video demonstrating SMD board inside FT-897D to makes the two fans run only when temperature threshold is reached
List of LAPD radio frequencies
A web site dedicate to those who enjoy working the airwaves from a Jeep, Land Rover or anything with 4 wheels