Cordless phone crystal frequency modulated voltage ----- fm Transmitter

Keywords: eight wood three unit FM receiving antenna production The production of a good frequency of FM is the wishes of many FMDX fans. Since the student era, I like to listen to the FM program. At that time, there were few frequency modes, but today, there is still no FM show (far from the city, the nearest distance There are also 100 kilometers), so the outdoor frequency frequency antenna is what I always like to do. I have done a single-handed vibrator, the effect is good, but the demodulation of the three-dimensional sound is not very good, so after nearly 1 month of finding materials and then find The master is welded, and finally the antenna, plus signal amplifier. The material is that I have ran a lot of agricultural machinery and auto parts, which has been found for a long ago (copper tube, diameter in 0.8 mm) and then refer to the FMA9901A FM ​​antenna size. This is the antenna vibrator joint, welded with tin, then wrapped with waterproof tape, picking 300 beep-75 beatings. The following is an antenna installed on the roof, is it beautiful? Be This is the size of the antenna. The antenna is connected to the test machine, and the directionality is strong than the previous single vibrator, and the stereo separation effect is very good.

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