radio frequency

radio frequency

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• A Short Course On Baluns - An interesting article on basics about Baluns, intoducing the skin effects on radio frequency currents and its effects on receiving and trasmitting article by VE7FO
  [ Hits: 347 | Votes: 1 | Rating: 10 ]
• Baluns and common mode chokes - Voltage baluns versus Current baluns. When to use them, differences, and typical usage in feeding antennas, or in resolving radio frequency interferences.
  [ Hits: 402 | Votes: 1 | Rating: 10 ]

• VE2CYH Covey Hill Amateur Radio Club - VE2CYH The Covey Hill Amateur Radio Club Repeater is located on the Covey Hill, mountain and it operates on the frequency of 146.685
  [ Hits: 213 | Votes: 3 | Rating: 9.33 ]

• 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 ]

• HackRF - open source hardware for software-defined radio. HackRF One is an open source hardware platform that can be used as a USB peripheral or programmed for stand-alone operation. 1 MHz to 6 GHz operating frequency
  [ Hits: 177 | Votes: 3 | Rating: 7.67 ]

• HF Bands - A review of the HF ham radio bands, considere by far the most popular bands in the amateur service. HF bands offer local QSOs and world-wide propagation are all possible at almost anytime with careful selection of the right frequency for the time of day, time of year, and current state of the sunspot cycle.
  [ Hits: 372 | 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: 927 | Votes: 5 | Rating: 3 ]

• Danny Shortwave And Radio DX - This channel is all about radio listening and dxing. I will be covering frequency bands like longwave, AM/MW and shortwave. I'm embarking on my renew interest in this hobby since my childhood.
  [ Hits: 271 | Votes: 2 | Rating: 10 ]

• BktDxCluster for Android - With BktDxCluster you can connect to all DX Cluster with DXSpider Protocol and telnet connection, filter the spots, send new spots, send commands to the cluster, set the radio to the frequency of the spot through BktRemote. Adroid App
  [ Hits: 201 | Votes: 2 | Rating: 8 ]

• flmsg - Fast Light Message - FLMSG is a simple forms management editor for the amateur radio supported standard message formats. Form data can be transferred between computers either using standard internet email or via radio frequency broadcasts typically made by an amateur radio operator on your behalf.
  [ Hits: 661 | Votes: 1 | Rating: 9 ]

• Radio Frequency - ICOM R8500 - The RadioFrequency Program is a professional Software dedicated to all HAM, SWL and Radio Listeners. Freeware. Included is a Text-CSV dBase Converter. Connection to the ICOM R8500 Receiver. Special Scanning Feature. Special Search Feature x large dBase.
  [ Hits: 699 | Votes: 2 | Rating: 7.5 ]

• 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 ]

• 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: 347 | Votes: 5 | Rating: 7.8 ]

• Experimental HF 6-band SSB transceiver - An SSB radio for the HF bands will be presented. Featuring 12 to 20 Watts of output power (depending on DC supply), full DDS frequency generation, covering 6 major frequency bands (1.8, 3.5, 7, 14, 21 and 28 MHz) within the short wave amateur radio spectrum. The rig also features colored LCD and front panel backlight.
  [ Hits: 709 | Votes: 14 | Rating: 9.86 ]

• rpitx Multimode TX for Raspberry Pi - rpitx is a general radio frequency transmitter for Raspberry Pi which doesn't require any other hardware unless filter to avoid intererence. It can handle frequencies from 5 KHz up to 1500 MHz.
  [ Hits: 279 | Votes: 0 | Rating: 0 ]

• A Transceiver Front-End Protector - A transceiver front-end protector in high signal level environments. An homemade RF limiter to protect your receiver front-end from high radio frequency.
  [ Hits: 663 | Votes: 0 | Rating: 0 ]
• KD9SV Front End Saver - Homemade RF limiter project, to protect the K3 receiver front-end for high radiofrequency based on the original KD9SV project.
  [ Hits: 328 | Votes: 0 | Rating: 0 ]

• Cross Band Repeaters - Crossband Repeating is a process where a Ham transmits one signal on one band (typically UHF), and it is received by another radio with a better antenna/power installation, and re-transmitted (typically on VHF) to another radio system, or a repeater. Everyday examples of cross-band repeaters are repeater receive sites that hear the input signals on 2m and retransmit those signals on a frequency higher than 220 MHz.
  [ Hits: 207 | Votes: 0 | Rating: 0 ]

• Tektronix Compatible Tracking Generator - A spectrum analyzer is always an usefull amateur radio test equipment that should be present in a radio shack. Hams can use it for testing frequency response of filters, amplifiers, and other two-port RF devices. This article illustrate a tracking generator compatible with any spectrum analyzer in the Tektronix 490- and 2750-series lineups
  [ Hits: 188 | Votes: 0 | Rating: 0 ]

• What is SWR - standing-wave ratio - Article about Standing-wave ratio (SWR) defined as a mathematical expression of the non-uniformity of an electromagnetic field on a transmission line. SWR is the ratio of the maximum radio-frequency (RF) voltage to the minimum RF voltage along the line.
  [ Hits: 191 | Votes: 0 | Rating: 0 ]

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