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  • JWSmythe commented on ray74's instructable Make a clay crucible mold1 month ago
    Make a clay crucible mold

    Is there a reason you did this with PVC and bondo, rather than casting your mold in aluminum?

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  • JWSmythe commented on deceiver's instructable Build a Large DB8 HDTV Antenna: Big Bertha6 months ago
    Build a Large DB8 HDTV Antenna: Big Bertha

    You need to do a little more reading. Specifically, the frequency ranges. Broadcast TV in the US ranges from 54 to 890 MHz.Wifi is generally 2412 to 2484 MHz and 4915 to 5825 MHz. It's usually written as 2.4 GHz and 5 GHz.Higher frequencies mean smaller wavelengths. In the antenna design, that will mean that you will use a much smaller antenna. So the long whiskers on this antenna would be much shorter. On the back, you would want more like 1/2" holes. The overall size will be much smaller. Wifi is also much lower power than broadcast TV, so you will need to increase the gain. Some people really like the enclosed yagi antennas (i.e., "cantenna"). I like parabolic mesh antennas. I have set up links that went many miles with relatively cheap gear. It really ...see more »You need to do a little more reading. Specifically, the frequency ranges. Broadcast TV in the US ranges from 54 to 890 MHz.Wifi is generally 2412 to 2484 MHz and 4915 to 5825 MHz. It's usually written as 2.4 GHz and 5 GHz.Higher frequencies mean smaller wavelengths. In the antenna design, that will mean that you will use a much smaller antenna. So the long whiskers on this antenna would be much shorter. On the back, you would want more like 1/2" holes. The overall size will be much smaller. Wifi is also much lower power than broadcast TV, so you will need to increase the gain. Some people really like the enclosed yagi antennas (i.e., "cantenna"). I like parabolic mesh antennas. I have set up links that went many miles with relatively cheap gear. It really helps to be in control of both ends, so you can use directional antennas for the link.... and ... Don't steal wifi. It's illegal. It may seem ok at the time, but you won't like what happens when people start throwing around phrases like "unauthorized access of a computer network". Just because you are a little farther away doesn't mean you can't be found.

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