USB wifi dongle waveguide

so i was surfing the web this morning and came across this post of at instructables: USB waveguide

i decided to make one and see for my self how well these work. to my surprise it works quite well. when over at my brothers house you can pick up a weak signal from my parents house you can get 1 to 2 bars of signal with my internal wifi card. after hooking up this waveguide with the external USB dongle i get almost a full signal.

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