long291 links - and 5 categories
Antennas : 20M
- W5GI Mystery Antenna
- 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: 131502 | Votes: 113 | Rating: 7.8 ]
- 3 element 50 Mhz Yagi
- A 3 elements long yagi antenna for 6 meters band by ON6MU
[ Hits: 12095 | Votes: 41 | Rating: 4.71 ]
- 70cm Longyagis
- 70cm-Longyagis in 28Ohm-DK7ZB-Design
[ Hits: 2403 | Votes: 3 | Rating: 7 ]
- Yagi for 80 and 40 meters
- Design plan of an array of a two element yagis for 80m and a 3 element 40m antenna sharing a single 12 meters long boom by EA5DY
[ Hits: 1452 | Votes: 4 | Rating: 6.5 ]
- RF in shack with vertical and longwire antennas
- Why a vertical antenna or longwire antenna might require a balun
[ Hits: 4645 | Votes: 5 | Rating: 7.6 ]
- Longwire Antenna Balun Project
- Home brew a long wire balun
[ Hits: 17448 | Votes: 25 | Rating: 6.85 ]
- Wire Antenna Life
- How long should a wire antenna last?
Wire antennas are not forever. Installation and quality are major factors in the useful life. Don't forget maintenance. You can avoid an untimely failure.
[ Hits: 2729 | Votes: 3 | Rating: 6.33 ]
- Inverted Vee monoband antenna
- This project will enable you to build a monoband long wire inverted vee with 3/4 wave length sides that will have a bit of gain
[ Hits: 2100 | Votes: 1 | Rating: 10 ]
- Antenna Transmatch Tips
- Tips on tuning antennas using Antenna Tuning Units also called ATU. This article explains the functions and ills of tuners, along with some guide- lines for building an ATU.
[ Hits: 3207 | Votes: 5 | Rating: 6.4 ]
- K9AY Flag Pennant Ewe
- Elongated Terminated Loops, usage and details by K9AY Lewallen
[ Hits: 1158 | Votes: 2 | Rating: 7 ]
- AMANDX Dipole
- The longwire antenna is a very effective antenna for the listener who wants to cover all of the shortwave bands from 530 KHZ to 30 MHZ.a
[ Hits: 3748 | Votes: 4 | Rating: 9.75 ]
- 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: 1819 | Votes: 7 | Rating: 6.86 ]
- 6m Half wave vertical
- This antenna is very useful for receiving or scanning purposes, but you can use it for transmitting, too. It is 2,94m long and has a pi-configuration (Collins-Filter) for the matching.
[ Hits: 3759 | Votes: 4 | Rating: 7.75 ]
- 43.33 Km LOS with USB WiFi stick
- Simple USB 802.11b WiFi adapter with original antenna used for this 27 miles long-range wifi connection test by adam 9A4QV.
[ Hits: 50753 | Votes: 103 | Rating: 5.64 ]
- ON6DP QSL-Manager-Database
- Qsl manager database files to download in multiple formats along to IOTA reference and other utilities
[ Hits: 818 | Votes: 6 | Rating: 3 ]
- New York Long Island Scanner Pages
- New York / Long Island Scanner forums, chat, and live scanner feeds of Nassau County Fire Departments. Site registration is needed to listen to the live feeds
[ Hits: 16955 | Votes: 29 | Rating: 4.82 ]
- This program allows both great-circle (polar) and rectangular projections of the world. The great-circle map is centered on any specified latitude and longitude (the "home" location). The rectangular projection is shown with the home longitude in the middle of the screen.
[ Hits: 1224 | Votes: 4 | Rating: 7.75 ]
- This free program displays the location of any locator on a map.
It calaculates between two Maidenhead locators the distance (km and miles) azimuth longitude latitude
Show the location, direction and distance as you move your mouse on a map!
Graphical Locator Program, By ON6MU
[ Hits: 1610 | Votes: 4 | Rating: 5.5 ]
- This free program calculates the location of any locator. It calaculates the distance, azimuth, longitude and latitude between two Maidenhead locators. Converts longitude/latitude coordinates to Maidenhead locator Converts Maidenhead locator to longitude/latitude coordinates
[ Hits: 960 | Votes: 1 | Rating: 10 ]
- Battery University
- On-line resource that provides practical battery knowledge for engineers, educators, students and battery users alike. The papers address battery chemistries, best battery choices and ways to make your battery last longer.
[ Hits: 624 | Votes: 3 | Rating: 9 ]
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