4 wire

281 links

G5RV Beam ^pop - G5RV 40m Beam Antenna. Adding a 28 ft. piece of vertical wire to one end of a 102 ft. center-fed dipole turns it into a 40m beam with a very wide beamwidth
[ Hits: 26918 | Votes: 7 | Rating: 9 ]

80M Vertical antenna with capacitance hat - Simple wire antenna cheap to make, using readily available materials, Low angle radiation, with rejection of high angle signals Wide bandwidth, with resonance at the 80M DX window (3.790-3.800 MHz); and Maximum height is 40 feet
[ Hits: 25088 | Votes: 23 | Rating: 7.05 ]

Balun for HF wire antennas ^pop - Schema of a self made balun used to match randmon wire antennas, mainly for shortwave listening pourposes, in italian
[ Hits: 36325 | Votes: 23 | Rating: 5.66 ]

The G5RV Antenna System Re-Visited - The original G5RV antenna system consists of a center-fed horizontal 102' wire plus a 34' length of open-wire 525-Ohm feeder. Louis Varney, the antenna system's developer, intended two other features. Learn more at Cebik website
[ Hits: 4661 | Votes: 0 | Rating: 0 ]

Wireman-J-Poles for 2m-40m ^pop - J-Poles with Wireman-cables for the quarterwave matching section, working on VHF and HF bands
[ Hits: 27083 | Votes: 252 | Rating: 8.37 ]

SkyWire horizontal loop antenna - A Wire resonant loop antenna for 160 meters band article by N4KC
[ Hits: 1036 | Votes: 2 | Rating: 9.5 ]

A $20 HF mobile antenna - A few hours of fun with PVC and wire and you have got yourself a respectable road radiator. The antenna consists of little more than some PVC pipe topped by a RadioShack replacement whip antenna and a couple of coils made from a small roll of #14 house wire.
[ Hits: 10547 | Votes: 6 | Rating: 7.33 ]

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: 3826 | Votes: 2 | Rating: 5.5 ]
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: 5647 | Votes: 2 | Rating: 7 ]

A Portable Multi-Band Magnetic Loop Antenna ^pop - Described here is a simple multi-band magnetic loop antenna designed for 20, 30 and 40 metres, but by changing the overall length of the wire coverage of other bands is feasible
[ Hits: 34659 | Votes: 12 | Rating: 6.33 ]
Modified Buddipole for 40 to 10 Meters - This is modified version of buddipole antenna, using vertical wires instead of telescopic ends by ks7j
[ Hits: 6250 | Votes: 7 | Rating: 6.57 ]

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: 4376 | Votes: 1 | Rating: 10 ]

Building a 2.4GHz 10 Element Brass Yagi ^pop - Build this home made yagi antenna for your 2.4ghz wireless ethernet.
[ Hits: 65001 | Votes: 121 | Rating: 7.38 ]

K4TR Antennas - K4TR Manufacture and sell simple dipoles, half square 2 wire phased vertical arrays, end fed zepp antennas, G5RV antennas. 1:1 baluns
[ Hits: 4429 | Votes: 8 | Rating: 7.88 ]

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: 924 | Votes: 2 | Rating: 9 ]

Lentini Communications, Inc. - Lentini Communications, Inc. was established in 1954. Located in Newington, Connecticut, home of the American Radio Relay League, retail and mail order outlet serves all your wireless communication needs. Stock amateur, CB and shortwave radios as well as Nextel cellular phones and more.
[ Hits: 5309 | Votes: 15 | Rating: 6.28 ]

Coaxial Cable & Power Handling - This calculator can be used to estimate the attenuation (dB loss), power handling capability, and transmission efficiency for some of the more popular Wireless Communications and MIL Spec cables at the frequency of interest
[ Hits: 1183 | Votes: 8 | Rating: 8.17 ]

Bbc new: home network on electricity wires
[ Hits: 556 | Votes: 0 | Rating: 0 ]
Broadband news : another bpl trial dropped - The company trialing the technology has decided BPL was not "commercially deployable," and has instead decided to focus on wireless mesh networking in the region
[ Hits: 367 | Votes: 0 | Rating: 0 ]

Antenna Noise and Signal Cancelling at LF - By using the signals from two antennas, controlling their relative amplitudes and controlling the phase of one of them, unwanted signal or unwanted noise can be phased out. Circuitry is described which uses the signal from a wire antenna to provide selective cancelling against the signal output from an LF loop antenna.
[ Hits: 7909 | Votes: 6 | Rating: 4.5 ]