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• Balun single core 4:1 analysis - Real 4:1 Transmission Line Balun with Balanced Load
  [ Hits: 6161 | Votes: 1 | Rating: 10 ]

• The quarter wave transformer - A transient analysis of an inpedance transforming device, by W9DMK, in pdf format
  [ Hits: 1005 | Votes: 1 | Rating: 1 ]
• Build An LF Antenna Analyzer - A Portable Low Frequency Antenna Analyzer, For those of us who like to play with antennas on the ham bands, one of the handiest tools to have around the shack is an "antenna analyzer". These gadgets combine a signal generator and standing-wave ratio (SWR) sensor in a small battery-powered unit.
  [ Hits: 4567 | Votes: 2 | Rating: 5 ]

• Coaxial Traps for multiband antennas - A new perspective on the analysis and design of this popular antenna element. By Karl-Otto Muller, DG1MFT
  [ Hits: 14641 | Votes: 8 | Rating: 5 ]

• Tenna Dipper Kit - The "Tenna Dipper" is a low power antenna analyzer and ATU tuning aid. With this handy accessory, you can determine the 50 Ohm resonance frequency of antennas or you can adjust your antenna tuner for a 50 Ohm match without generating QRM
  [ Hits: 4037 | Votes: 4 | Rating: 3.25 ]

• Cebik antennas and limited space dipoles - An analysis of the cebik dipole and other small limited space dipoles fed with open wire ladder line.
  [ Hits: 2827 | Votes: 3 | Rating: 9.33 ]

• K8ZT's Ham Radio Resources - K8ZT's Extensive Ham Radio Resources about QRP, Vanity Callsigns, Software, Maps, Kent State, Shack Design, Argonaut, Sommer, Log Analysis
  [ Hits: 3470 | Votes: 11 | Rating: 5.91 ]

• W&W Batteries manufacturer - U.s.a. manufacturer of replacement radio batteries, battery packs, inserts, chargers, analyzers, and battery eliminators for the public safety, land mobile, amateur radio and cellular phone industry.
  [ Hits: 1017 | Votes: 0 | Rating: 0 ]

• Bitscope - An affordable high bandwidth mixed signal pc based digital oscilloscope logic analyzer.
  [ Hits: 1559 | Votes: 4 | Rating: 3.25 ]

• Batterytech - Buy nimh, ncicad, and li-ion batteries, chargers, and analyzers for laptops, pdas, digital cameras, cellular phones, nextel radios, hand held scanners, and eliminators
  [ Hits: 751 | Votes: 1 | Rating: 10 ]

• Smith Chart Software - SimSmith is a highly interactive, real time Smith chart graphing program. Circuits are constructed using drag-n-drop. Load files can be imported from the EZNEC and CocoaNEC antenna simulation software and from the AIM4170 and miniVNApro antenna analyzers. Circuits and load files can be of any size. Key Features: SimSmith is one of the few Smith chart packages which models transmission line losses. SimSmith also allows the description of circuit elements using algebraic equations. SimSmith has only one screen and allows the screen to be resized to increase workspace or readability.
  [ Hits: 1574 | Votes: 6 | Rating: 6.5 ]
• TLE for windows - Transmission Line equations for Windows. Written in Visual C++. This program provides the most comprehensive analysis of a transmission line by w9dmk
  [ Hits: 1112 | Votes: 1 | Rating: 5 ]
• NEC4WIN - NEC4WIN is a 32 bits commercial antenna simulation software based on MININEC3 developed by the Naval Ocean Systems Center in the 70s and 80s. It runs under Windows and can be used to simulate, analyze and optimize wire antennas, beams, verticals, etc. NEC4WIN has limitations. They are the same as Mininec3 on which the engine is based.
  [ Hits: 1875 | Votes: 2 | Rating: 7 ]

• FFT Explorer - A free (GPL) Linux (Xwindows GUI-based) utility that performs spectral analysis on real-time data from a sound card or other source, and can analyze the spectra of various sound file types. It can also accept data from many kinds of applications in plain-text form by way of the "named pipe" feature of Linux
  [ Hits: 10989 | Votes: 8 | Rating: 4.88 ]

• Baudline signal analyzer - A Linux based FFT spectrum analyzer designed for time-frequency browsing and scientific data visualization. Oscilloscope waveform, statistical histogram, accumulated spectral trace,Weak Signal reception, continuos data logging, FFT Analyzer and specialized measurement windows.
  [ Hits: 12378 | Votes: 32 | Rating: 8.85 ]

• SatTrack Suite - Satellite Tracking and Orbit Propagation, Reports and Mission Planning Products, Pass Scheduling and Orbit Event Analysis, Dynamic Communications Link Modeling, 3-D Visualization of Complex Scenarios User Defined Regions and Contours, Constellation and Formation Flying Support, Global Positioning System Coverage
  [ Hits: 2543 | Votes: 6 | Rating: 6.17 ]

• SpectraVue - A Windows based Spectral Analysis/Receiver Program primarily used with the SDR-IQ, SDR-14 , SDR-IP, RF capturing hardwares
  [ Hits: 1366 | Votes: 1 | Rating: 9 ]

• SpectraScope - SpectraScope is a simple Windows interface program allowing your computer to view up to two audio waveforms in either the time or frequency domain. The program is a Windows soft panel operating as a dual channel oscilloscope and spectrum analyzer. The useful frequency of operation is 20 to 10,000 Hz in the time domain and 20 to 20,000 Hz in the frequency domain. The program uses the computer sound card to capture the audio input.
  [ Hits: 10806 | Votes: 3 | Rating: 7 ]

• Audio spectrum analyzer  ^pop - Analyzes audio from 10 Hz to 20 kHz, input from microphone or wave file, Variable sample rates (8000 Hz, 11025 Hz, 22050 Hz, 44100 Hz) Variable transform sizes (1k, 2k, 4k, 8k) Upper and lower limits adjustable Continuous, averaged, peak hold
  [ Hits: 30295 | Votes: 54 | Rating: 3.82 ]

• Rainbow Antenna Analyzer - A small and inexpensive measurement device designed to determine antenna performance across the amateur bands through use of automatically collected SWR readings
  [ Hits: 6766 | Votes: 7 | Rating: 5.57 ]

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