IW5EDI Simone

Step-By-Step Construction of a 4:1 Current-Type Balun

Posted on September 24, 2015September 24, 2015 by Simone

Article by Charles Greene, W1CG My 4:1 current-type balun is wound on a FT-114-43 core. The FT-140-43 is a little easier to work with, and maybe the FT-140-77 would cover 160-10. This one is reasonably flat from 4.5 to 35 MHz but drops off a little at 3.5, 40-ohms with a 200 ohm resistor on…

Log Periodic Antenna for 10-20 meters bands

HF Log Periodic Antenna

Posted on September 13, 2015September 13, 2015 by Simone

A plan for HF Log Periodic Antenna working 10-20 meters band by VA2PHI Pictures originally available at http://hb9tmw.free.fr/EuroNet/HTML/loghf.html

YOTA 2015 – trip to Florence

Posted on July 22, 2015 by Simone

A visit to Florence by the Ham YOTA 2015 group

YOTA 2015 – II5YOTA

Posted on July 20, 2015July 20, 2015 by Simone

My recent visit to YOTA 2015

Modifying HP Server Power Supplies for Ham Radio Use

Posted on July 18, 2015 by Simone

This article documents the modification of 2 typesof Hewlett Packard switching power supplies to enable their use as power sources for ham radio equipment. Obsolete server power modules can be bought fromÂ online dealers at very good prices due to the massive replacement of older network servers; typical prices for a unit are as low…

A Sleep Strategy for DX Contesting

Posted on May 20, 2015 by Simone

A Sleep Strategy for DX Contesting This article originally appeared in the National Contest Journal. Why am I here? Listen to all these signals. Who are they? Wonder what they are doing? All this CW sure sounds nice. What should I do with this keyer paddle? Should I push this button? I can turn this…