point to point
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Antennas : 20M- W5GI Mystery Antenna
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- W5GI Mystery Antenna is a multi-band wire antenna that performs exceptionally well even though it confounds antenna modeling software.
This antenna covers 80 to 6 meters with low feed point impedance and will work with most radios, with or without an antenna tuner. It is approximately 100 feet long, can handle the legal limit, and is easy and inexpensive to build. It is similar to a G5RV but a much better performer especially on 20 meters.
[ Hits: 139383 | Votes: 123 | Rating: 7.55 ]
- HF Home made Balun
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- A balun is a device that is used at the feedpoint of a balanced antenna when an unbalanced feedline is desired to feed the antenna. Balun is a contraction for BALanced to UNbalanced.
[ Hits: 39398 | Votes: 30 | Rating: 5.91 ]
- Antenna Impedance measurement
- When experimenting on an antenna it's often important to determine its feedpoint impedance at various frequencies across the operating band. It's easy enough to measure SWR, but sometimes we need to know more detail than this
[ Hits: 1426 | Votes: 6 | Rating: 2.67 ]
- Another way to look at vertical antennas
- What iss the difference between a dipole and a vertical? Maybe not as much as you think. Come along
and try another point of view.
[ Hits: 4048 | Votes: 0 | Rating: 0 ]
- Sensitivity of Multi Turn Receiving Loops
- Magnetism is manifested as a 'field of vectors', that is, any point in the magnetic field has not only a magnitude, but a direction in space. The four Maxwell equations describe how electric and magnetic vector fields behave and interact.
[ Hits: 353 | Votes: 0 | Rating: 0 ]
- DK7ZB 144 mhz Yagis
- High gain, good pattern and acceptable bandwidth. These aims can be realized with a radiation-resistance of 25-35Ohms, because the 28-Ohm-feedpoint is very simple to match.
[ Hits: 1909 | Votes: 7 | Rating: 6.86 ]
- 802.11b Homebrew WiFi Antenna Shootout
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- Guide to homebrew your wifi antenna, using a tin can, in this cases using a pringles can. This antennas are also known as cantenna and let you spread your wifi signal.
[ Hits: 71701 | Votes: 62 | Rating: 6.59 ]
- How to build a tin can waveguide antenna
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- Looking for an inexpensive way to increase the range of your wireless network? A tin can waveguide antenna, or Cantenna, may be just the ticket. This design can be built for under $5 U.S. and reuses a food, juice, or other tin can.
[ Hits: 37651 | Votes: 45 | Rating: 7.46 ]
- Getting started in contest
- A PowerPoint presentation by Bruce Draper, AA5B on how to get started in contesting, no matter if you are a big gun or a little pistol
[ Hits: 956 | Votes: 1 | Rating: 1 ]
- W9DC IOTA Awards
- W9DC North America Amateur Radio checkpoint for IOTA Islands on the Air and WLH World Lighthouse award applications and award instructions; Island and lighthouse award links for international radio operator activities
[ Hits: 964 | Votes: 3 | Rating: 6.33 ]
- The Guide of Japanese IOTA Points
- Introducing Japanese IOTA points and islands to foreign amateurs.
[ Hits: 559 | Votes: 2 | Rating: 8 ]
- PJ9JT Contesting QTH
- SignalPoint, Caribbean Contesting Consortium. Curacao. CCC's contesting QTH is the former home of PJ9JT, John Thompson, W1BIH. This historic site has been the home of many contest wins since 1971.
[ Hits: 1347 | Votes: 1 | Rating: 7 ]
- The Nechako Radio Club
- The Nechako Radio Club was formed in the summer of '93 to provide a common meeting point for the local area amateur radio operators.
[ Hits: 274 | Votes: 0 | Rating: 0 ]
- ScannerBuddy.com
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- Directory of emergency scanners pinpointed by location on a map of the US with direct feeds
[ Hits: 37794 | Votes: 62 | Rating: 5.33 ]
- Peet Bros Company
- Manufacturer of advanced electronic systems to measure such weather data as: wind speed, wind direction, wind chill, pressure, humidity, rainfall, and dew point.
[ Hits: 635 | Votes: 2 | Rating: 10 ]
- Austin Antenna
- Austin Antenna employs leading-edge antenna technology in the production of the highest performance antennas currently available. Marine Antenna, Multi-band Mobile, Point-to-Point, Base Station, Wide-band Land Based, LPDA, Linear Omni, Triplexer, Scanner Antennas
[ Hits: 4142 | Votes: 7 | Rating: 8.43 ]
- NBEMS
- The Narrow Band Emergency Messaging System (NBEMS) for Windows is a suite of software programs designed for point-to-point, fast, error-free, emergency messaging up to or over 100 miles distant, and takes up a very minimum of frequency space on the ham bands, leaving more space for other ham activites.
[ Hits: 1308 | Votes: 1 | Rating: 10 ]
- Satellite Finder
- Satellite Finder is a way to accurately point satellite dishes at communications satellites in geostationary orbit.
[ Hits: 3181 | Votes: 10 | Rating: 6.21 ]
- HamView
- A freeware program to dig out weak signals buried in noise, functionally similar to the excellent FFTDSP of AF9Y, but with the added bonus of real time audio filtering of the incoming signals. Just point and click with the mouse, and the selected signal will stand out from the QRM and noise.
[ Hits: 7563 | Votes: 3 | Rating: 5 ]
- Vacuum tube Basics
- Here's a tale of early '70s vacuum tubes, mainly from the viewpoint of amateur radio.
[ Hits: 844 | Votes: 1 | Rating: 10 ]
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