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Antennas : Dipole
Dipole Calculation
- Determining your proper length for the open half-wave dipole antenna
T2FD, The Forgotten Antenna
- The terminated. tilted, folded dipole T2FD is a little known antenna that performs excellently. Compact in size compared to a half-wave dipole the T2FD provides signal gain, wide frequency coverage, and exceptionally low noise characteristics.
K7MEM Center-Fed Half-Wave Dipole ( 3-30 MHz)
- A Center-Fed Half-Wave Dipole is probably the simplest of antennas to construct and use. It is usually suspended between two supports, from it's end insulators, and has the feedline hanging from the center.
How to make a Simple Dipole Antenna
- It is very easy to create a simple 1/2 wave dipole, all you need is some lengths of wire such as the core of some mains flex or even a straightened out metal coat hanger, some co-ax cable and a connector for your scanners antenna input
Axial-Mode Helical Antennas
- Notes on Axial-Mode Helical Antennas in Amateur Service. Helix Basics, Modeling Issues, and Short Helical Antennas Over Perfect Ground
Helical Feed Antennas
- Helical antennas have long been popular in applications from VHF to
microwaves requiring circular polarization, since they have the unique
property of naturally providing circularly polarized radiation. Paul Wade W1GHZ
Helical/helix antenna 2.4 GHz HOWTO
- Helical/helix antenna cookbook recipe for 2.4 GHz wavelans and/or WiFi applications
Skywire Loop Antenna
- Also known as W0MHS Loop Skywire or Full Wave Loop Antenna, here you can find N1SU interesting observations
The 3-D Folded Loop Antenna
- This article will introduce you to an antenna author call the 3-Dimensional Folded Loop. This
antenna is the result of his continuing efforts to compact full-size antennas by folding and
bending the elements. A one-wavelength loop that is reduced in height and width by being folded into three dimensions.
A short Quagi for 1298Mhz
- Based on K5OE design by GM1SXX
Remotely-tuned loop antenna for LW and MW
- This article describes how to build a loop antenna for low frequency (LF) and medium wave (MW) reception with remote-controlled tuning. The antenna is extremely sensitive and can be built mostly from parts from old radios and tape recorders. Like all loop antennas, it is highly directional, which allows you to null out unwanted noise sources.
The Lindenblad antenna
- The ultimate satellite Omni Antenna by Howard Sodja, W6SHP. The Lindenblad antenna consists of four half wave folded dipoles slanted 30 degrees to the horizon, oriented 90 degrees to each other in azimuth, spaced 0.3 wavelength apart
Loop Antenna Basics
- Loop Antenna Basics and Regulatory Compliance for Short-Range Radio
Building the WiFi parabolic antenna
Priority listing
- Building a Bell ExpressVu satellite dish with a waveguide coffee can cantenna feed, and a Netgear USB Rangemax wifi card (WPN111).
European PSK Club
- The European PSK Club, or EPC for short, is an informal club of amateur radio operators dedicated to maintaining high levels of amateur radio communications on PSK modes. Its purpose is to promote activity and good operating practice on the PSK modes on all amateur bands
HeathKit SB200 Mods
- SB-200 Notes, SB-200 mods schematic. SB-200 mods photos
Natural Radio Listening: Streaming Audio
- A page about fascinating Very Low Frequency and natural radio, with lots of streaming audio links from remote receivers. Some experimental stereo pairs around the world.
Shortwave DX Blog
- A blog with loggings and information relating to shortwave pirate radio in Europe.
RUMLog
- RUMlog is a short-wave logging and QSL handling/printing tool for MacOSX
RUMlog is available with an interface for transceiver control. Supporting Kenwood, Elecraft and ICOM. (IC-7400/IC746PRO, IC-7000 and IC-706)
RUMPed
- RUMped is a logging tool for short wave for the MAC under OSX. It is not designed for the daily QSOs. Currently RUMped supports a DX-pedition mode, some major contests and a general contest mode for unsupported contests.
Bitscope Waveform Generator
- Integrated DSP based waveform generator and timing for BitScope. Arbitrary waveforms, synchronized clocks and external triggers.
SweepGen
- SweepGen turns a PC into an Audio Oscillator and Sweep Generator which can be used for testing audio or educational purposes. In conjunction with audio test instruments, you can make frequency response plots. SweepGen uses the sound card in your PC to produce sinewaves
Simple adjustable passive attenuator
- This adjustable passive attenuator works as a "waveguide beyond cutoff." It can be constructed in about ten minutes from parts available locally.
The Smart Switch
- The purpose of this project is to build a smart switch
A smart swith is a swith that needs a short press and the power will be turned ON.
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