radio range

radio range

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• Efficiency of the Z Match - Various configurations of the Z Match Tuner are tested for power efficiency over a wide range of antenna load conditions
  [ Hits: 968 | Votes: 4 | Rating: 5.5 ]

• Trapped vertical Antenna - This antenna is an omnidirectional and multiband and it is well suited for DX enthusiasts with limited space. Each of the parallel circuits (trap) behaves like an isolator on its resonant frequency.
  [ Hits: 356 | Votes: 7 | Rating: 2.71 ]

• DX HOLIDAY - DX-HOLIDAY is a DX holiday and DXpedition holiday-style dedicated website which provides excellent information on a range of pertinent topics such as: organize a DX-holiday in remote area, organize DXpedition holiday-style with your family, booking and negotiating with hotels, obtaining a foreign amateur radio license, rent a radio shack and antennas during your holiday, travel documentation & money matters, health, emergency, and weather issues
  [ Hits: 314 | Votes: 2 | Rating: 2.5 ]

• The DX Shop - The DX Shop Limited are suppliers of high end equipment and manufacturers of the Linear Amp Gemini range of HF to UHF solid state linear amplifiers for the serious Radio Amateur.
  [ Hits: 151 | Votes: 0 | Rating: 0 ]

• HG7AN Antenna Analyzer - Antenna Analyzer plus 500 is a multifunctional measuring instrument, very useful for amateur radio activity. Its size allows you to easily take it for relocation as well. Frequency range: 100KHz - 500MHz. Access directly via WiFi. Includes a dual-channel signal generator
  [ Hits: 266 | Votes: 1 | Rating: 10 ]

• HF communication prediction tools - Online HF Communication prediction system provided by the Australian Governament Buerau of Metereology allow to predict usable frequency rage for radiocommunications between two stations allowing to specify frequency and date range. This tool allow calculation with different methods and algorithms
  [ Hits: 169 | Votes: 0 | Rating: 0 ]
• Tropospheric Ducting Forecast Europe - The areas noted in the forecast have the necessary atmospheric conditions to produce tropospheric bending of VHF, UHF and/or microwave radio waves. Tropospheric bending extends the range of radio & TV stations well beyond their normal limit and thus increases interference amongst stations as well.
  [ Hits: 157 | Votes: 1 | Rating: 10 ]

• FT991 MARS Mod - This modification will expand the tx frequency range of the Yaesu FT-991 from allowing just ham radio bands, to all bands 1.8 - 30MHz and 50-54 MHz.This information is solely for use by licensed members of MARS (Military Affiliate Radio System) or CAP (Civil Air Patrol)
  [ Hits: 926 | Votes: 5 | Rating: 3 ]

• LAN-IQ SDR - Stand Alone Software Defined Radio, direct sampling receiver from 30 kHz to 1700.00MHz continuous frequency range, LAN interface for remote access
  [ Hits: 258 | Votes: 1 | Rating: 8 ]

• Ham Goodies - Amateur Radio goodies for not only the Shack, but also a range of outdoor/portable kit. Ferrite toroids, RTL SDR, Un-uns and Baluns for antennas and RF Filters. Based in the UK.
  [ Hits: 145 | Votes: 0 | Rating: 0 ]

• MiniKits - Largest range of Electronic Kits and Components for the Radio Experimenter in Australia
  [ Hits: 276 | Votes: 0 | Rating: 0 ]

• SDRplay - SDRuno - SDR software for SDRPlay RSP1, RSP1A, RSP2, RSP2PRO. SDRuno is an advanced Software Defined Radio Application platform which is optimized for use with SDRplay's range of Radio Spectrum Processors
  [ Hits: 413 | Votes: 0 | Rating: 0 ]
• 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: 160 | Votes: 1 | Rating: 6 ]

• DIY Ham Radio Loudspeaker - An interesting article on how build an optimal sounding communications loudspeaker capable to optimize sound reproduction at the frequency range from 150 Hz to 3 kHz.
  [ Hits: 524 | Votes: 0 | Rating: 0 ]

• Battery Charger for Hand Held Radio Battery Packs - This is a handy little charger that can provide a charging current of up to 120 mA continuously for batteries in the range up to 12 volts. The supply is housed in a small plastic enclosure 90 x 55 x 32 mm.
  [ Hits: 88 | Votes: 0 | Rating: 0 ]

• ICOM IC-775 FIlter Installation - Inrad Roofing Filter installation instruction, The IC-775 Roofing Filter Mod consists of a 6 pole, 5 kHz wide filter followed by a high dynamic range, feedback amplifier.
  [ Hits: 61 | Votes: 0 | Rating: 0 ]

• Homebrew a High Performance SSB RTX for 14 MHz - This article describes the construction of a high performance transmitter and receiver for SSB (voice) communication covering the 14MHz (20 meters) high frequency amateur radio band with output range 15 to 20 watts and a top audio sound quality both on transmit and receive.
  [ Hits: 346 | Votes: 5 | Rating: 7.8 ]

• SDR Receiver with RTL-SDR and Gnu Radio - This project is a Software Defined Radio Receiver. It has a frequency range of 24MHz 1.2GHz. It can demodulate AM, FM, USB, LSB with selectable bandwidths of 600, 2400, 2800, 3200 and 6400Hz. Using a simple RTL-SDR Dongle and Raspberry Pi 3 computer using GNU RADIO
  [ Hits: 484 | Votes: 1 | Rating: 1 ]

• How RTL-SDR dongles work - Since 2012, the RTL-SDR is the simple and cheap way to give Software-Defined Radio a try. For about 25 euro you get a receiver covering much of the VHF and UHF range, and by either adding an upconverter, or using the direct sampling option, also the HF bands. They are so cheap because they are mass-produced as DVB-T receivers.
  [ Hits: 129 | Votes: 1 | Rating: 10 ]

• Homemade spectrum analyzer - An inexpensive spectrum analyzer for the radio amateur, with a respectable performance and a quite good dynamic range. Schematic and basic information on how spectrum analyzers works.
  [ Hits: 371 | Votes: 0 | Rating: 0 ]

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