Jeff Duntemann's Technology Projects 
10/2002: The "Boozooka," a hand-held Wi-Fi directional antenna made from a steel can that originally held a bottle of fancy spiced rum.
10/2002: The "Boozooka," a hand-held Wi-Fi directional antenna made from a steel can that originally held a bottle of fancy spiced rum.
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10/2002: I bent a piece of 1/4" hardware cloth into a parabola and mounted a Wi-Fi AP in front of it. This greatly increased the range of the AP in one direction, though it was very touchy to adjust.
10/2002: I bent a piece of 1/4" hardware cloth into a parabola and mounted a Wi-Fi AP in front of it. This greatly increased the range of the AP in one direction, though it was very touchy to adjust.
Viewed: 5588 times.

12/2002: A TetraBrik soup box is foil-lined and will also function as a waveguide antenna. The Hunt's can works better, though.
12/2002: A TetraBrik soup box is foil-lined and will also function as a waveguide antenna. The Hunt's can works better, though.
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12/2002: My 10" scope in Arizona, on its poured concrete pier. I replaced the original aluminum tube with a cardboard Sonotube in 1974. The yellow is contact paper, because the Sonotube was wax-coated and would not hold paint.
12/2002: My 10" scope in Arizona, on its poured concrete pier. I replaced the original aluminum tube with a cardboard Sonotube in 1974. The yellow is contact paper, because the Sonotube was wax-coated and would not hold paint.
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12/2002: Michael Abrash and I with the 10" scope.
12/2002: Michael Abrash and I with the 10" scope.
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12/2004: This shows how I breadboard tube projects. This receiver didn't work well, but the breadboard technique allows fast changes.
12/2004: This shows how I breadboard tube projects. This receiver didn't work well, but the breadboard technique allows fast changes.
Viewed: 5588 times.

Three examples of plug-in coils for homebrew shortwave receivers. The two on the left are made from vitamin bottles with bases from defunct octal tubes. (Note that the center one has not yet been wound.) The one on the right is a commercial Bakelite form, though I don't know where it was originally sold.
Three examples of plug-in coils for homebrew shortwave receivers. The two on the left are made from vitamin bottles with bases from defunct octal tubes. (Note that the center one has not yet been wound.) The one on the right is a commercial Bakelite form, though I don't know where it was originally sold.
Viewed: 5241 times.

9/2005: 6T9 stereo amp on my test bench, almost finished.
9/2005: 6T9 stereo amp on my test bench, almost finished.
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9/2005: My 6T9 stereo amp, almost completed, under-chassis view. Only the tone control pot stills need to be wired.
9/2005: My 6T9 stereo amp, almost completed, under-chassis view. Only the tone control pot stills need to be wired.
Viewed: 5960 times.

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