wire

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wire

775 links - and 5 categories

Antennas : Feed Lines
  • Transmission Lines - Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.
    [ Hits: 1174 | Votes: 0 | Rating: 0.00 ]
  • SWR: Maximum allowable VSWR - VSWR (voltage-standing-wave-ratio) represents the degree with which an antenna is "matched" to the system impedance. Most modern antennas do not require any tuning for optimum performance. VSWR is one of the easiest parameters to measure and VSWR meters are becoming very popular antenna installation tools
    [ Hits: 1127 | Votes: 3 | Rating: 3.33 ]
Antennas : Homebrewing Techniques
  • Yagi Element Mounting Considerations - One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom
    [ Hits: 4104 | Votes: 2 | Rating: 8.50 ]
Antennas : J-Pole
  • Wireman-J-Poles for 2m-40m  pop - J-Poles with Wireman-cables for the quarterwave matching section, working on VHF and HF bands
    [ Hits: 25928 | Votes: 223 | Rating: 8.27 ]
Antennas : Multiband
  • A Magnetic Loop antenna for 7-21 mhz - If you find external wire antennas obtrusive for amateur radio or short wave listening, then this is the antenna for you, is just 1 meter diameter
    [ Hits: 3563 | Votes: 2 | Rating: 5.50 ]
  • The 5 Bands Wire-Beam - This wire-beam has one radiator-element, feeded with 450-Ohm-Wireman-twinlead and needs an antenna-tuner. For the bands 6m, 10m, 12m, 15m, 17m and 20m bended reflector-elements are used. The support is a cross of 4 fibreglass-fishing-rods
    [ Hits: 5537 | Votes: 2 | Rating: 7.00 ]
Antennas : Portable Antennas : Shortwave
  • Long Loopstick Antenna - Wound on a 3 foot length of PVC pipe, the long loopstick antenna was an experiment to try to improve AM radio reception without using a long wire or ground.
    [ Hits: 4139 | Votes: 1 | Rating: 10.00 ]
Antennas : Theory
  • Antenna Selection Made Easy - This page will help you answer important questions about antenna selection before you talk to a supplier. After reading this paper, you should be able to better determine the most important parameters you need to know for your antenna selection criteria.
    [ Hits: 1897 | Votes: 2 | Rating: 3.00 ]
  • Antenna Polarization notes - Antenna polarization is a very important consideration when choosing and installing an antenna. Most communications systems use either vertical, horizontal or circular polarization. Knowing the difference between polarizations and how to maximize their benefit is very important to the antenna user.
    [ Hits: 2253 | Votes: 4 | Rating: 3.50 ]
Antennas : Wire
  • How create simple dipoles - How to create a simple but effective half wave dipole, illustrated instrucions on how to build wire antennas
    [ Hits: 3235 | Votes: 4 | Rating: 6.50 ]
FRS and GMRS : Resources
  • Popular Wireless Magazines - Since 1995, one of best places to go for information about GMRS and FRS. Offer a bulletin board community on the topic
    [ Hits: 914 | Votes: 1 | Rating: 10.00 ]
Manufacturers : Antenna Switches
  • Alpha Delta Communications - Manufacturers and distributors of coaxial surge protectors, coaxial switches, insultators, HF fixed wire antennas
    [ Hits: 2783 | Votes: 4 | Rating: 5.83 ]
Manufacturers : Cable and Connectors Manufacturers : Digital and Packet Radio
  • RACOM - Radio modems - RACOM is a Czech company specialized in design and production of radio modems and other devices for wireless data networks for radio channels from 140 to 900 MHz. RACOM radio data networks are suitable for data transfer in telemetry & SCADA applications, transaction networks, security systems, IP networks and firts of all mobile tracking and fleet management.
    [ Hits: 736 | Votes: 2 | Rating: 9.00 ]
Manufacturers : Microwave
  • CAP Wireless Amplifiers - Design and manufacture application specific microwave and RF amplifiers, upconverters, downconverters and multifunction assemblies.
    [ Hits: 645 | Votes: 4 | Rating: 7.00 ]
Manufacturers : Towers and Accessories
  • Telecom Product Profiles - Telecom Product Profiles is a manufacturers' rep firm specializing in factory direct Nello Towers, monopoles, antenna mounts, shelters, and more. Factory direct Cellular, PCS, and Wireless Broadband equipment such as antennas, radios, and more. Installation, financing, and leasing options available.
    [ Hits: 857 | Votes: 1 | Rating: 10.00 ]
Shopping and Services : Parts & Surplus
  • Skycraft Parts - Skycraft Parts & Surplus, Electronic Surplus Store in the Southeast, antenna parts, wires.
    [ Hits: 936 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Coax Cables and Connectors
  • RF Coaxial Connectors - RF coax(ial) connectors are a vital link in the radio spectrum. Coax connectors are often used to interface two units such as the antenna to a transmission line, a receiver or a transmitter. The proper choice of a coax connector will facilitate this interface.
    [ Hits: 4141 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Lightning Protection
  • About Lightning Protection - What You Should Know About Lightning Protection by Joseph H. Reisert
    [ Hits: 2922 | Votes: 1 | Rating: 8.00 ]
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