Ham radio. Antenna Questions?

Why do amateurs usually l / 2 dipoles and l / 4 verticals? Is it possible to have a dipole fyll and al / 8 vertical length? or al / 4 dipole? What would the length of radials for al / 8 can be vertically? When do you use coils? Use them only to industries or dipoles, too? Why l / 2, at present no coils?

Dipole (L / 2) and Marconi (L / 4) are the easiest to design and take much less space than a full-wave antenna. It saves material costs, Weight and size. For each fraction of the wavelength, it all depends to transfer from the desired frequency – determine the length. Lower Frequencies require longer lengths, higher frequencies require shorter lengths. For antenna lengths shorter than to L / 4, you electrical "length" to add by a coil. The other reason is a coil is used to match the impedance of the antenna to the transmitter. L / 4 Antennas are contributing typically 50 ohms, but the transmitter could be much higher, inductors and capacitors to the high output impedance of the transmitter to the antenna for maximum game Power is transferred. .

Hustler 4BTV Vertical Antenna Assembled

Solarcon I-MAX 2000 CB/Ham Radio Base Station Vertical Antenna – 24′ $96.01 Solarcon IMAX-2000 24ft Omni-Directional Fiberglass Base Station Antenna 5000 Watts….

MIRROR MOUNT 3 way Aluminum with Stud for CB / Ham Radio Antenna Bracket – Workman RV1 $3.59 …

MAGNETIC Mobile ANTENNA Ham Radio 2 Meter / 70 cm 144 – 148 & 440 – 470 MHz $23.95 Magnetic Antenna with approx. 12ft Coax cable & pl-259 Connector attached. Transmits 144-148 / 430-450Mhz Dual band. Can be ued with Mobiles, or with Optional adapter cable for Handhelds too!…

Vertical Antenna Classics (Radio amateur’s library) $10.20 …

Practical Antenna Handbook $35.00 The Antenna Builder’s Bible – Updated and Better Than Ever! Design and construct your own antennas with step-by-step instructions and plans. Joseph J. Carr’s Practical Antenna Handbook, Fourth Edition, is an update of the most popular book on antennas ever written. This empowering guide blends theoretical concepts that engineers need to design practical antennas with hard-learned less…

Where can I find a tripod antennas made ​​for the holding of antennas /?

I needed the same thing …. Did you remove a cheap rotary line in Tesco the line and turned it upside down, works perfectly.

Home Made Tripod Test With Miracle Antenna & FT-817

NextG USB-Yagi Plug & Play 11N Long Range WiFi antenna 2200mW $99.95 The 007GTi NextG USB-Yagi antenna is designed to connect your desktop computer or laptop easily to any Wireless-B or Wireless-G or Wireless-N network via a USB connection. The award winning TurboTenna Hi-Gain Antenna technology extends the wireless connection up to 4km in an open field. The 18dBi Directional Yagi antenna is driven by the new USB WiFi power amplifier that provides more distance and…

LG HX350T 720p LED Front Projector with Digital TV Tuner $1,099.99 The HX350T LED Projector is designed for portability with its compact size, yet delivers high definition performance. Weighing just over 1.74 pounds, the HX350T throws a 40 inch image from only 3.6 feet away from the screen. Its USB Host Function can play HD DivX videos, MP3s, view images, and even Microsoft Office documents without a PC. Simply connect a USB drive and select the media file you wa…

2.4GHz Square GRID Parabolic Antenna 24dBi $47.98 Square grid antenna is designed for the spread spectrum system, the surface design with welded-steel reflector to bring out the best performance. This antenna features high gain, long coverage, light weight, compact structure and excellent wind-resistance. It is used for outdoor and the range is up to 6.2 miles. The connector type is N female, and the low loss N Male type cable assembly is stro…

Midland 18-2442 Mobile CB Antenna $11.23 Center load magnetic-mount mobile CB antenna has stainless steel whip with relief spring. 3-year limited warranty. Water Resistant: Yes, Pairs (qty.): Single item…

Hildozine Remote Transceiver Caddy for Pocket Wizard Units $6.99 This patented unit is designed to attach to a Transceiver and have the ability to mount on a light stand, tripod, etc… No more dangling on the end of a cord or using Velcro. Simply screw in the back of the Transceiver and use the bungee cord to secure it. This Caddy is an inexpensive way to make your Transceiver very secure and is a perfect match for all PocketWizard Products….

I have ATT Uverse TV wireless modem my phone, all by one goal. I get interference?

from a ham radio operator directly behind me. Is there anything that can be done to eliminate this problem.

Is this person truly an amateur radio operator, or a CB operator to run illegal power. Ham operators right technology Practices to avoid interference. CB operators have no knowledge or care of such practices. If he is a ham, just contact with him would be fin ashe'd certainly happy to help. A CBER would not try to help you.

Amateur Radio PSK-31 (Receiving) Demonstration Presented by KI7F in Denver, Colorado

Cisco-Linksys WAP11 Wireless-B Network Access Point $51.99 An external wireless network access point for wireless networks based on the IEEE 802.11b standard…