Hace unos 20 años tuve a mi cargo durante un tiempo a los hombres jóvenes de la Iglesia. Era común que tuviéramos actividades deportivas o recreativas al aire libre. Para esos casos, me hice un megáfono pasivo, o sea sin amplificación electrónica, sino de esos que se usaron durante siglos para dirigir la voz hacia adelante, minimizando su dispersión, lo cual en la práctica es casi equivalente a una amplificación, y resulta realmente efectivo.
Hace unos días, durante mis paseos en bicicleta, encontré tirado en la basura uno de esos rotores centrales de lavarropas, parecido al que había usado en aquella época, y aunque en la actualidad no necesito un megáfono, lo recogí y lo traje a casa, al solo efecto de hacer este instructable. Espero que a alguno de los lectores le resultará útil.
About 20 years ago I was in charge for a time the young men of the Church. Common was that we had sports or outdoor recreation. For those cases, I made a passive megaphone, ie without electronic amplification, those that were used for centuries to direct the voice forward, minimizing the dispersion, which in practice is almost equivalent to an amplification, and it is really effective.
A few days ago, during my bike rides, I found thrown in the trash one of these washing machine agitators, like that I used at that time, and although now I don't need a megaphone, I picked it up and brought it home to the only effect of making this instructable. I hope that some readers will find it useful.
Hace unos días, durante mis paseos en bicicleta, encontré tirado en la basura uno de esos rotores centrales de lavarropas, parecido al que había usado en aquella época, y aunque en la actualidad no necesito un megáfono, lo recogí y lo traje a casa, al solo efecto de hacer este instructable. Espero que a alguno de los lectores le resultará útil.
About 20 years ago I was in charge for a time the young men of the Church. Common was that we had sports or outdoor recreation. For those cases, I made a passive megaphone, ie without electronic amplification, those that were used for centuries to direct the voice forward, minimizing the dispersion, which in practice is almost equivalent to an amplification, and it is really effective.
A few days ago, during my bike rides, I found thrown in the trash one of these washing machine agitators, like that I used at that time, and although now I don't need a megaphone, I picked it up and brought it home to the only effect of making this instructable. I hope that some readers will find it useful.
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Este rotor-agitador es ligeramente más complicado que el de hace 20 años: tiene un cono central que habrá que retirar. Ese será el primer paso. Para eso hay que cortar en primer lugar el extremo más delgado del rotor, a efectos de poder introducir una hoja de sierra dentro de lo que de ahora en adelante llamaré "la bocina", y así retirar ese cono central que molesta.
Una vez retirado el cono central, hay que emparejar el interior de la bocina lo mejor posible. No soy un experto en sonido, pero supongo que cualquier irregularidad en la superficie interna de la bocina influirá negativamente en el resultado final.
This agitator is slightly more complicated than 20 years ago: It has a central cone that must be removed. That will be the first step. To do this, must be cut in the first place the thinner end of the rotor, in order to introduce a saw blade in what would now call "the horn" and thus remove the annoying central cone.
After removing the central cone, you have to match the interior of the horn as much as possible. I'm not an audio expert, but I suppose that any irregularity on the inner surface of the speaker will influence negatively the final result.
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excellent, especially to take to the soccer games.
Interesting techniques.
From a "twin-tub" washing machine I think.
L
L
e.g.
Muy buen articulo, si la queres dejar brillante proba pasandole brasso, o algun pulidor por el estilo.
Saludos.
(Hi Bruno, thanks for the comment. If at some point I need to dedicate to piquetero and need the megaphone, I'll follow your suggestion. For now, I'll keep laburando ... A hug.