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Metal detectors: PI907, PI807-KIT, PI701-KIT. Characteristics

Metal detector PI 907

Metal detector PI 807-KIT Do-it-yourself

Metal detector PI 701-KIT Do-it-yourself

Theory of impulse metal detectors

Spy detector

Antennas: Do-it-yourself

Bee poison

History

Antennas

How to make an antenna by ourselves?

A practical guide to building an antenna.

Copyright : 1993-2006

author: PhD Iliya Kantchev

The book includes :

40 pages

35 tables

30 figures

Contents:

• Electrical parameters of the antennas
• Linear half-wave vibrator , with its required length, for TV channels in the metric and decimetric frequency range
• Folded dipole and its length for the whole TV range
• Two elements antenna. Geometric size of the antenna from the 1st to the 12ve TV channel
• Type "yagi" antenna. Three-element antenna,with its size for the range from the 1st to the 12ve Tv channel
• Five-element "yagi", with its size for the range from the 1st to the 12ve TV channel
• Six-element "yagi" antenna, for the 145 MHz range
• Nine-element "yagi" antenna, for the 900MHz range
• Seven-element "yagi" antenna, with its size for the TV channel range from 6 to 39
• Eleven-element "yagi" antenna, with its size for the TV channel range from 6 to 39
•  Which antenna to be used for a certain distance, the diameter of the tubes or the materials the "yagi" antenna is made of, the number of elements an antenna should have for a particular distance
• Same-phase antennas. Connection of two floor antennas
• Sixteen-element antenna for the decimetric range
• Frame antenna. Two and three-element frame antennas. Range of 1 to 12 TV channel,as well as for the frequencies of 340 MHz , 380 MHz , 390 MHz, 920 MHz. A triple square for the 1 - 12 TV channel range
• Zigzag antenna type. Its size for the 1 - 12 TV channel range
• Multi-range antennas. An antenna for the 6 – 12 TV channel range
• "Running wave" type antenna for the metric range
• Logo periodic antenna for the 1 - 5 TV and 6 - 12 TV channel range. Logo periodic antenna, covering the frequency range from 470MHz to 790 MHz
• Two-program antenna for the 1 - 5 TV channel range
• Synchronizing with an U type joint and calculating its size
• The most popular long distance radio phones and their technical characteristics
• Vertical half-wave vibrator. "Walled-in jar" type antenna for the frequency range of: 250, 260, 300, 320, 340, 380, 390, 400, 420, 450, 900, 910, 920 MHz
• Antenna for radio phones. "Yagi" type antennas for 263 MHz and 393 MHz
• Vertical oriented antenna for the frequency range: 27, 28, 44, 49, 50, 144, 250, 260, 300, 320, 340, 380, 390, 400, 420, 450, 900, 910, 920 MHz
• Logo periodic antenna for the frequency range: 27 - 50 MHz, 66 - 108 MHz, 250 - 450 MHz, 400 - 920 MHz, 140 - 950 MHz, 140 - 450 MHz, 48 - 230 MHz, 470 - 900 MHz
• The TV channels' frequency

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- 1993 - 2006 -