DIY long wave signal receiving antenna ----- Antanna

Author: Xinhong The long wave receiving antenna is made on a skeleton having a diameter of 40 cm, which is made of a lacquerable wire, a coil of 1000. The enameled wire used can be obtained from several old power transformers to remove its primary coil. In addition, the above coil can also be purchased from the electronic market or online. In order to wind a long wave, a 40 cm ring can be scratched on a piece of wooden board, and then the arc is adjusted 8 a length of the nail, which constitutes a simple frame, as shown. Wrap around the frame, carefully remove the 1000 coil with the enameled wire, and take the insulation to protect the coil, and then remove the iron nails, you can get the complete coil to secure the resulting coil to a wooden box. Be When using, make sure the coil components are firmly used. Because in use, if there is any vibration or movement of the coil, it will cause the coil signal to interact with the magnetic field to fail the coil operation. The long wave coil is used to receive a long wave signal, and when the magnetic field direction of the signal is 90 ° in the direction of the coil plane, its coil absorbs the signal. The coil is used for measurement due to the length of the long-wave ring, and the recording process is slow, and the position of the measured signal source should also be identified.

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