In my experience with computer antenna simulators (I mostly use 4NEC2), I had the feeling that those tools, if correctly employed, can be quite accurate. Unfortunately, when working on shortwave antennas, the interactions with the surrounding environment make the results a bit approximate: such long wavelengths make impossible, at least for us hobbyists, to avoid the environment to […]

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This page documents the format of the Tytera DM380/Retevis RT-3 codeplug binary file. This is not an official format definition but it has been determined by changing settings with the “CPS RT3” program version V1.30.0. This specification is used by the rdt2csv conversion utility to export/import codeplugs in the CSV format. General rules The codeplug, with […]

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The recent Tytera MD-380, also known as Retevis RT-3, is very nice DMR portable UHF rig. However, one of its weak points is the programming software. While DMR for utility use often requires simple programming, when used for HAM radio, the big and evolving number of available repeaters, users and zones makes programming a big […]

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Questo post, purtroppo incompleto, fa seguito alle numerose richieste che ho ricevuto relativamente ad una mia sperimentazione, ormai risalente al 2011, che vedeva coinvolta la parte RTX di un vecchio telefono veicolare Italtel a 450 MHz commercializzato negli anni ’80 dalla SIP. Di questo telefono esistono due modelli, MB-44S, più vecchio ed ingombrante (a destra […]

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