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Antennas : 2M- An 8x2 Element Array Antenna For 144 MHz
- This stacking offers a well known simple phasing technique. All elements can be fed in parallel by open wires provided that they are fed in phase. This can be achieved by twisting the open wire phasing-lines at 180 degrees.
[ Hits: 164 | Votes: 0 | Rating: 0 ]
- Microvert antenna calculator
- Online antenna calculator for the microvert capacitive antenna
[ Hits: 122 | Votes: 2 | Rating: 8 ]
- 1:49 unun for end fed half wave antennas
- 1:49 UNUN using two stacked FT240-43 cores for end fed halfwave antenna. To match the end fed half wave antenna to the coaxial feeder, it is necessary to have a matching network or transmission line transformer.
[ Hits: 386 | Votes: 10 | Rating: 8.1 ]
- To transform ot not to transform - Feed Lines
- Transmission lines have many uses other than simply transferring RF power from one point to another.
Impedance matching, baluns and filters are probable the most common of these.
[ Hits: 137 | Votes: 0 | Rating: 0 ]
- Field Day Inverted L
- Inverted L antenna, even if not completely freestanding, it only requires one line to be lauched into a tree to support the end of the horizontal wire. This project is done with a 31-foot Jackite pole for a support and uses six 15-foot radials and one 33-foot radial.
[ Hits: 87 | Votes: 0 | Rating: 0 ]
- IARU Beacon Map Live
- This online map shows the IARU beacons. If the clock on your PC is accurate enough, it will also show which ones are broadcasting at the moment and on which band.
[ Hits: 313 | Votes: 3 | Rating: 6.67 ]
- DXCenter DX Cluster
- Online world map with live updates from the DX Cluster network, displaying new spots on the maps as they appear. Filtering options are available including bands, source continent and dx continent.
[ Hits: 349 | Votes: 2 | Rating: 5.5 ]
- IK6BAK QSL Archive
- Online QSL archive counting 13400 QSL scanned and indexed online with a searchable database
[ Hits: 88 | Votes: 0 | Rating: 0 ]
- WebSDR Roma2 Online Radio
- Online websdr receiver based in Rome Italy provides a nice user web interface and receiver most of the amateur radio HF bands
[ Hits: 385 | Votes: 2 | Rating: 4.5 ]
- DK0TE KiwiSDR Germany
- Online internet HF LW MF web receiver based in Baden-Wuerttemberg cooperative state university Ravensburg Campus Friedrichshafen running a T2FD antennan under roof.
[ Hits: 260 | Votes: 2 | Rating: 10 ]
- Volda Communication
- Volda is specialized in telecom tower antenna line accessories such as cable hangers, coaxial jumpers, grounding buss bar kits, pole clamps.
[ Hits: 63 | Votes: 0 | Rating: 0 ]
- Guide to 6 Meter DXing
- Getting Started on the Magic Band is a very exaustive article about operating the six meters band. It covers several aspects of operations, techniques, tips and guidelines on getting started on the six meters band.
[ Hits: 225 | Votes: 0 | Rating: 0 ]
- Ferrite Shop
- Ferrite-shop is an on-line shop for ferrite toroids, cable cores and cable clamps based in The Netherlands
[ Hits: 174 | Votes: 0 | Rating: 0 ]
- remoteRotator
- remoteRotator is a command line application which makes your azimuth / elevation antenna rotators available on the network. It available for Linux/Windows/MacOS and written in the programing language Go.
[ Hits: 283 | Votes: 2 | Rating: 10 ]
- Thevenin equivalent calculator
- The Thevenin equivalent simplifies a complex circuit into an equivalent circuit with a voltage source and resistor for easy analysis of voltage and current at any point in the circuit. Use this online Thevenin calculator
[ Hits: 53 | Votes: 0 | Rating: 0 ]
- Repeater-START App
- The amateur radio listener for when you're not on the radio. Repeater-START, the offline repeater listing app for Windows, Linux, Raspberry Pi, Ubuntu, Librem Phone is available, Now with grid square display, topographical maps and frequency preferences
[ Hits: 150 | Votes: 0 | Rating: 0 ]
- Ham365
- ham365 is an independent online logbook, free for all Amateur Radio Operators. First launched in December 2008 as the online logbook of Ham Radio Deluxe, it is now integrated with many other logbook programs. Share own logbook over the net.
[ Hits: 148 | Votes: 0 | Rating: 0 ]
- OnLine Morse Tutor by NoseyNick
- An online version of a fully automatic morse code teaching machine.
This morse machine permit to select several different options including speed, volume, tone and set of characters. This version works works with any HTML5 browser.
[ Hits: 148 | Votes: 1 | Rating: 10 ]
- RF Impedance Matching Calculator
- Calculates the network to match a line to a specific complex load. This online tool calculates the matching network necessary to terminate a line of the specified characteristic impedence Zo in a specific complex load impedence RL + jXL at a specified frequency.
[ Hits: 192 | Votes: 1 | Rating: 10 ]
- Online Toroid Multi Calculator
- This website provide online calculator for several values about a large variety of toroids. Freq/L/C/Z/Turns Calculator, Impedance Matching Network Calculator
[ Hits: 210 | Votes: 3 | Rating: 5 ]
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