Meter Dipole
Meter Dipole
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BK Precision AN 304 Dipole Antenna (2.25 to 2.65GHz) $249.00 The BK Presision AN 304 Dipole Antenna is a New Dipole Antenna (2.25 to 2.65GHz) for Model 2650/2658.... |
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BK Precision AN 303 Dipole Antenna (1.7 to 2.2GHz) $249.00 The BK Precision AN303 is one of our Factory New 2.2 GHz Dipole Antenna for models 2650 and 2658.... |
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BK Precision AN 305 Dipole Antenna (390 to 410MHz) $335.00 Dipole Antenna (390 to 410 MHz) for models 2650 & 2658... |
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FM Indoor or Portable 1/2 Wave Dipole Transmitter Antenna with BNC $19.99 This FM indoor broadcast transmitter antenna is very unique in that it is very lightweight and simple to use but will perform as well as any non-directional FM broadcast antenna if used inside or in the attic or in a portable setting. This FM transmitter antenna is a turnkey FM antenna system as it includes 9' of coax (other lengths optional) and a BNC connector for your FM transmitter! Your FM tr... |
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Boss MCK1560.5 Combo Kit includes MR1560DI, MR50W, ANT10, MRC5 $309.00 Combo Kit Includes Mr1560DI, MR50W, MRC5, MRANT10 Radio Tuner with 24 Station presets Switchable USA/Europe radio frequencies Front panel auxiliary input Compatible with audio output of iPod or other MP3 players Quartz digital clock ESP (anti-skip mechanism) MP3/CD-R/CD-RW compatible Aux/mobile video input (rear) Separate bass and treble Dual (front and rear) RCA output... |
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Boss MCK1520.6 Combo Kit includes MR1520UA, MR60W, ANT10, MRC5 $379.00 Combo Kit Includes MR1520UA, MR60W, MRC5, MRANT10 Front panel controls USB Port SD/MMC Memory Card Port On-screen menu system Audio/video input controls NTSC/PAL compatible Built-in dual channel infrared (IR) audio transmitter Wireless remote control Includes - Black, Grey, and Tan interchangeable Pillow Covers... |
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Alfa 1000mW 1W 802.11b/g USB Wireless WiFi Network Adapter With Original Alfa Screw-On Swivel 9dBi Rubber Antenna $34.99 The Alfa AWUS036H is the latest version of the most powerful card available. This has a stunning 1000mW output power. So if you are looking for a device to connect to an outdoor 2.4 GHz antenna, such as on a boat or an RV, this is a perfect solution. It outperforms wireless cards that are built in to newer laptops. Adding this to your laptop or desktop computer will enhance range and signal qualit... |
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High Power 500mw USB Wifi Wireless G 802.11g LAN Adapter with High Gain 5dbi Antenna $39.99 Some of laptops there would be no longer include a PCMCIA card slot. This High Power Wireless USB WiFi Adapter would be another way for you to get a wireless connection option with an external antenna connector. This Adapter will work on any PC with a USB port (laptop or desktop) and is especially ideal for folks whose laptops do not have a PCMCIA slot who need a long range wireless solution. And ... |
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Boss Marine MR1462S Marine Audio System Silver $212.00 Boss Marine MR1462 In - Dash Marine Audio System brings great tunes to your water time... a complete kit including remote! Tune in while you're out on the water. The Boss Marine MR1462 Marine Audio System gives you a marine-grade housing and complete AM / FM, CD functions with wired remote control plus speakers and antenna you'll be ready to go in no time! Radio Details: 80 watts x 4 channels outp... |
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Boss Marine MCK2626W Marine Audio System White $274.26 Boss Marine MCK626 In - Dash Marine Audio System brings great tunes to your water time... a complete kit including remote and MP3 compatibility... SAVE! Tune in while you're out on the water. The Boss Marine MCK2626 Marine Audio System gives you a marine-grade housing and complete AM / FM, MP3 / CD functions with wired remote control plus speakers and antenna. Best of all, our volume-negotiating p... |
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Palm Plus High Power 802.11 b, g High Gain USB Wireless B / G Long-Rang WiFi Network Adapter with a 5 dBi Dual Band Antenna - Up to 54 Mbps $8.99 500mW High Power WLAN USB adapter (mini Palm) fully supports the features and functional compliance of IEEE 802.11b/g standard. It enables the deployment the latest updated WMMTM (Wi-Fi Multimedia). Our WLAN USB palm provides competitive price high power and stable performance to PC & NB in wireless network world.Features:WLAN USB adapter + 5 dBi dipole Antenna* Power up to 500mW* High power in c... |
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500mW Wireless 802.11g USB 2.0 High-Gain Adapter High Power 27dBm w/ High Gain 5dBi Dipole Antenna & USB Extension Cable * Mini Palm size * $9.99 500mW High Power WLAN USB adapter (mini Palm) fully supports the features and functional compliance of IEEE 802.11b/g standard. It enables the deployment the latest updated WMMTM (Wi-Fi Multimedia). Our WLAN USB palm provides competitive price high power and stable performance to PC & NB in wireless network world.Features:WLAN USB adapter + 5 dBi dipole Antenna* Power up to 500mW* High power in c... |
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PowerLink Max Distance 802.11b/g/n (1500M) $14.99 Premiertek PowerLink Max Distance Outdoor IEEE 802.11n (draft) - Wi-Fi Adapter PT-H9DN-ROC Network Adapters - Wireless... |
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Falcon Cb Radio Dipole Antenna Indoor Outdoor Now Rated at 1500 Watt $23.99 This is an Indoor, Outdoor apartment, house, condo, attic or garage CB, Citizens Band Radio Transmitting antenna. It is made to be hung in the rafters or from the ceilings. Or outside on the roof, or between 2 trees or the side of a wall, or whatever you can imagine. It will now handle up to 1500 watts PEP and comes pretuned. These can be mounted almost any where, and in any shape, horizontal, v... |
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Practical Antenna Design 140-150 MHz VHF Transceivers Third Edition $20.99 This authoritative and well-researched book is the only one that will give all of the most important and reliable on VHF antenna construction techniques. This unique book offers a superb collection of detailed, easy-to-follow, fully illustrated, and tested designs, covering such types of antennas as: omnidirectional antennas, gain-omni antennas, gain-directed beams, portable antennas, Yagi antenna... |
Non-trivial physics question - electricity and magnetism?
How much force is required to flip the dipole moment of a water molecule as it interacts with a charged surface (electrode) ? The potential gradient can be as high as 10^10 volts per meter at an electrode surface, this can easily orient water dipoles, but how can this be measured as a 'Force' that acts on the water as opposed to just an electrical field?
The answer, not surprising, is also non-trivial. Assume the electric field (potential gradient) is uniform in the region of interest. Make a simplified model of the water molecule: a slight positive charge centered on the oxygen nucleus and a slight negative charge centered on each hydrogen nucleus. Use Coulomb's Law (see reference) to calculate the force vector on each of the three charges from the elctric field. If the field is pulling the positive charge up, it is pulling the negative charges down.
It isn't a flip. You're just applying a force on each molecule, encouraging it to align in a particular direction. An isolated water molecule in a gas is moving linearly and rotating. You are applying a force and influencing that motion. A water molecule in liquid water is also influenced by the hydrogen bonds with neighboring molecules. Your electric field is competing with these other strong forces. It's even harder to coax water molecules in ice out of their stable, quiet resting places, since they're in equilibrium with their neighbors and just vibrating gently.