Can anyone help me find an amplifier that can amplify 22Hz signal which is to be transmitted to a distance of 25m through a copper wounded antenna...I have tried with a voltage (sine wave) of 9V across the antenna . But the required distance cannot be acheived.. I am trying to increase the magnetic strength of the coil by increasing the voltage across the coil, like about 20V across it.. Can anyone help me with this???
closed as unclear what you're asking by Chris Stratton, Harry Svensson, Bimpelrekkie, Transistor, winny Jan 8 at 8:50
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