According to the latest statistics of Ningbo Customs, from January to October this year, the city exported 2.166 million solar cells worth 520 million U.S. dollars, an increase of 4.9 times over the same period of last year; the average export price was 238.5 U.S. dollars, an increase of 61.6%.
In July of this year, the US Senate Energy Committee passed a plan for millions of solar roofs in the United States. The total investment in the next ten years will reach US$4.75 billion. This move will stimulate the explosive growth of the U.S. photovoltaic market in the next few years and bring significant benefits to the export of solar cells in Ningbo. Customs statistics show that in the first 10 months, Ningbo exported 70,000 solar cells to the United States, valued at US$110 million, an increase of 2.9 times and 4.2 times year-on-year respectively.
Homemade library ground wave TV double ring indoor antenna: The received ground decimeter wave frequencies are currently in the 500-800 MHZ frequency range. If there is a good field strength in the urban area, low frequency and high frequency should be taken into account. This is the best resonance; The frequency center is around 700MHz, which is converted according to the radio propagation speed and frequency. If the center frequency wavelength is about 42cm, then the diameter of the ring antenna should be 13cm, that is, the diameter should be a quarter of the center frequency wavelength of about 42cm. If we think of a 42cm conductor as a ring with a central frequency and wavelength of 42cm, then its diameter should be close to 13cm. If we make a good antenna, we can get twice the result of receiving ground waves with half the effort!
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