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• The YU7EF 6m and 4m antenna - Realization of the YU7EF 6m(6elm) and 4m(7elm) duo band antenna on a 6m boom by OZ1DJJ
  [ Hits: 1719 | Votes: 2 | Rating: 4.5 ]

• Open Wire Feed Line a second look - Put up the longest dipole you can fit, feed it with open wire line, connect it to the balanced output of your tuner and poof! Instant multiband antenna. Is life really that simple?
  [ Hits: 2680 | Votes: 8 | Rating: 6.69 ]

• Optimizing half-wave sloper arrays for 160 meters - This article presents a 160-meter variation of this family of antennas and, more importantly, a discussion of the details of how to get such a beast working really well.
  [ Hits: 5241 | Votes: 2 | Rating: 7 ]

• Antenna Tuning Units for better reception - For good Short Wave reception long aerial really is required to dig those distant stations out of the ether.
  [ Hits: 4274 | Votes: 4 | Rating: 6.5 ]

• n9adg.com - Amateur radio, Technology, Towers, Land, Wilderness, real estate, Visalia DX Convention Report #1 Flexradio Antennas Dxpedition, Elecraft introduces K3, here are pictures of the radio from the outside and inside from the Visalia DX Convention
  [ Hits: 369 | Votes: 0 | Rating: 0 ]

• VE2CLM Club Radio Amateur de la Rive Sud de Montreal
  [ Hits: 463 | Votes: 3 | Rating: 8.67 ]
• UMS Union Metropolitaine des Sans-filistes de Montreal - Ham Radio Club Montreal Canada
  [ Hits: 417 | Votes: 0 | Rating: 0 ]

• C.O.S.W.N. Central Ohio Severe Weather Network - Providing real-time weather spotter reports for the following counties: Delaware, Fairfield, Fayette, Franklin, Hocking, Licking, Madison, Pickaway, Ross and Union.
  [ Hits: 480 | Votes: 5 | Rating: 7.4 ]

• Signatec - Signatec manufactures pc based data acquisition waveform digitizers pci daq boards, digital signal processing pci dsp boards, waveform signal generator pci dac boards, and real time waveform recording products for the signal technology market.
  [ Hits: 460 | Votes: 0 | Rating: 0 ]

• Google Maps APRS - APRS web map with weather, telemetry, messaging and a bulletin board. Google Maps and Google Earth views update automatically in real time. 14 languages.
  [ Hits: 929 | Votes: 14 | Rating: 7.42 ]

• DStar- is anybody else worried about this? - D-Star is being promoted as a new digital voice transmission mode "For the second century of Amateur Radio" - but does it really fit into the spirit of the hobby?
  [ Hits: 410 | Votes: 0 | Rating: 0 ]
• ARRL Experimenting with Icom D-Star Digital System - ARRL has embarked on a project to learn firsthand what D-Star digital technology has to offer and to assess its capabilities in a real-world Amateur Radio environment.
  [ Hits: 569 | Votes: 0 | Rating: 0 ]
• D-Star on YouTube - D-star videos, introduction to d-start, real examples on YouTube
  [ Hits: 795 | Votes: 1 | Rating: 10 ]

• K6DBG - CW really is a language - Some things I've discovered about learning and operating CW by Chris Kantarjiev K6DBG
  [ Hits: 646 | Votes: 3 | Rating: 10 ]

• NU-Tech - NU-Tech is a powerful DSP platform to validate and real-time debug complex algorithms, simply relying on a common PC. Thanks to an easy plug-in architecture, the developer can write his own NUTSs (NU-Tech Satellites) in C++ and immediately plug them into the graphical interface design environment.
  [ Hits: 844 | Votes: 1 | Rating: 10 ]

• Spot - Intelligent DXCluster Client - Reliable amateur radio software for OS X and Windows that works the way you expect. Spot allows you to chase the DX that really matters by putting you in charge of which DX spots you need to see and alarming you when they appear.
  [ Hits: 1621 | Votes: 0 | Rating: 0 ]

• Spectrum Analyzer Real-time FFT - Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.
  [ Hits: 11316 | Votes: 9 | Rating: 7.77 ]

• Restoring an RF Signal Generator - This signal generator is intended for realignment of radio receivers
  [ Hits: 3394 | Votes: 4 | Rating: 9.5 ]

• 1.8-54 Mhz Low pass filter - An easy to make HF low pass filter form high power
  [ Hits: 3836 | Votes: 3 | Rating: 4.67 ]

• Vacuum tube liquid cooling system - This article describes an alternative to water as the cooling liquid for amateur radio vacuum tube power amplifiers. This cooling system is designed for adequate vacuum tube cooling, reasonable cost, and very low maintenance. By K8CU
  [ Hits: 667 | Votes: 1 | Rating: 10 ]

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