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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 ]
- 50 MHz Omnidirectional antenna
- Horizontal polarized omni directional 50MHz Antenna.
This antenna is intented to use in a contest station as a second system beside the stacked yagi beam system.
An omnidirectional systeem can be an advantage when it comes to short openings on wich the operator must react quickly.
[ Hits: 309 | Votes: 6 | Rating: 2.5 ]
- The Quarter-wave stub
- The Quarter-wave stub can be used for many purposes. If it is left with an open end it can be used as a notch filter to attenuate certain frequencies. A quarter wave length of a transmission line can also be used as an impedance transformer, to know more about the Quarter-wave impedance transformer
[ Hits: 134 | Votes: 1 | Rating: 8 ]
- Quad Loop Antenna for 50 MHz
- Building A Full-Wave Quad Loop Antenna for 6 Meters. This is an easy antenna to build and the materials cost about $15-20. It exhibits 1.8dB gain over a 1/2-wave dipole. Using an open-wire parallel feedline (commonly called ladder line) with an antenna tuner, it tunes up on the 10m band as a 5/8-wave loop as well
[ Hits: 196 | Votes: 1 | Rating: 1 ]
- Short Antenna for 40-30-20 Meters Band
- This page describes an entirely simple, One-Knob matchbox that will match this antenna efficiently on 40, 30 and 20m, using a simple circuit that can be switched between series-resonant and parallel-resonant with just one banana jumper
[ Hits: 235 | Votes: 1 | Rating: 7 ]
- ADIF to KML converter
- This freeware application for Linux and windows, allows you to convert an ADIF file to a KML file so you can map your QSOs easily and open it with google maps, or google earth or any application supporting the KML format
[ Hits: 203 | Votes: 0 | Rating: 0 ]
- W4MCT Johnson County (Tennessee) Amateur Radio Club
- The amateur radio club serving Johnson County Tennessee and northeastern Tennessee and southwestern Virginia. Open to all licensed hams.
[ Hits: 55 | Votes: 0 | Rating: 0 ]
- World of Receivers and Transmitters
- A searchable database of online websdr receivers, lists OpenWebRX, KiWi SDR and WebSDR from all over the world, providing a web interface to search and filter links to websdr
[ Hits: 304 | Votes: 3 | Rating: 4 ]
- UR5VIB Online SDR
- Online web SDR from central part of Ukraine powered by OpenWebRX KiwiSDR at UR5VIB
[ Hits: 368 | Votes: 3 | Rating: 7.33 ]
- SR4DON Web Radio Receiver
- OpenWebRX online radio receiver from Olsztyn Poland 10-15 meters bands, 50 MHz VHF UHF bands.
[ Hits: 183 | Votes: 1 | Rating: 10 ]
- Digirig Mobile
- Digirig is an open-source integrated digital modes interface for amateur radio.
As a differentiating feature, Digirig only requires a single USB connection to the computer with all the digital goodness packed in a single small enclosure. The internals include a USB hub, audio codec, a fully featured serial CAT (Computer Aided Transceiver) interface, and potentially other modules such as GPS receiver for time synchronization.
[ Hits: 148 | Votes: 1 | Rating: 2 ]
- Interactive Grid Square Map
- An online interactive grid square map made with openstreet map. Just point and click and zoom in to determine an accurate grid square locator till 10 digit resolution
[ Hits: 556 | Votes: 6 | Rating: 6.67 ]
- Watching Propagation with FT8 Spots
- Monitoring propagarion during the day using FT8 reception reprts to determine openings and quality of propagation
[ Hits: 149 | Votes: 0 | Rating: 0 ]
- What to Expect at Solar Minimum
- Article on operating aids and band usage during solar minimun periods. Author tries to explain what can we expect on the HF bands during a solar minimum period and which approach to be used to understand band openings.
[ Hits: 223 | Votes: 1 | Rating: 1 ]
- WFView Open Source interface for Icom transceivers
- Wfview is a program that allows many modern Icom ham radio transceivers (such as the IC-7300, IC-9700, IC-7610, IC-R8600 and many others) to be controlled via a computer. wfview shows the gorgeous spectrum display on whatever display is connected, including projectors, touch screens, and TVs. wfview allows for full radio control from a computer keyboard and basic control from a numeric keypad. It works under Windows, Linux and MacOS
[ Hits: 360 | Votes: 2 | Rating: 10 ]
- SDRangel
- SDRangel is an Open Source Qt5 / OpenGL 3.0+ SDR and signal analyzer frontend to various hardware TX & RX Software Defined Radio. SDRangel uses sample source plugins to collect I/Q samples from a hardware device.
[ Hits: 154 | Votes: 1 | Rating: 6 ]
- SDRPlusPlus
- SDR++ is a cross-platform and open source SDR software with the aim of being bloat free and simple to use.
Multi VFO, Wide hardware support (both through SoapySDR and dedicated modules), SIMD accelerated DSP
Cross-platform (Windows, Linux, OSX and BSD), Full waterfall update when possible. Makes browsing signals easier and more pleasant, Modular design (easily write your own plugins)
[ Hits: 210 | Votes: 0 | Rating: 0 ]
- Antenna Switch
- An home made antenna switch with a Dummy Load selector.
If you forget the radio is connected to the open or grounded side of the switch and you try to transmit, it is very easy to damage the finals of your transceiver.
[ Hits: 318 | Votes: 3 | Rating: 8 ]
- OTRSP Antenna Selector
- Open Two Radio Switching Protocol Antenna Selector on ATMEL ATmega8 microcontroller
[ Hits: 91 | Votes: 0 | Rating: 0 ]
- The Timing Keyer
- An open hardware and open source keyer that allows you to precisely diagnose any timing errors in your keying.
[ Hits: 87 | Votes: 0 | Rating: 0 ]
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