mars 2012 – Multimode.fr – Blog radiomateur

dimanche, 6 juillet 2025

RFSim99 sous Windows 7 ou 10 (32 ou 64 bits)

Posted on 30/03/2012 by F4CWH | 3 Comments

Ce logiciel permet de simuler des filtres passe-bande, passe-haut, passe-bas, de calculer les caractéristiques d’une ligne bifilaire, ou encore l’impédance d’une ligne imprimée, ou d’une self (sur air ou imprimée).…

Indices solaires, géomagnétiques et alertes HF

Posted on 06/03/2012 by F4CWH |

Cette page présente les indices géomagnétiques et solaires, ainsi que les alertes du Space Weather Prediction Center (NOAA – USA) en vigueur actuellement. Pour plus d’information sur ces alertes, visitez…

Antenne filaire raccourcie 4 bandes HF à trappes : modélisation

Posted on 01/03/2012 by F4CWH | 0 Comments

J’avais envie d’essayer les antennes à trappes. Avec une contrainte que rencontrent de nombreux OMs : peu d’espace. Il m’est ainsi impossible de déployer un dipôle 1/2 onde sur 80…

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