MARTINDALE'S CALCULATORS ON-LINE CENTER PART I: F-H HAM RADIO, HI-FI, ACOUSTICS, NOISE EXPOSURE

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Ham Radio Amateur & Commercial Radio Exams Amateur Radio Design ~ Antenna ~ Call Sign Distance & Location Frequency & Wavelength ~ Grid Location Acoustics Hi-Fi, Sound Systems Acoustics ~ Sound ~ Speaker Design Calculators On-Line Center, Part I:F-H

Ham Radio

Amateur & Commercial Radio Exams FOR MORSE CODE CALCULATORS SEE CALCULATOR CENTER PART I A-E: MORSE CODE AMATEUR RADIO PRACTICE EXAM AMATEUR RADIO PRACTICE EXAM - S. Twigger, FCC & FAA Exam Practice For more information see FCC & FAA Exam Practice MOCK HAM EXAMS - eHam.Net For more information see the eHam.Net COMMERCIAL RADIO PRACTICE EXAM COMMERCIAL RADIO PRACTICE EXAM - S. Twigger, FCC & FAA Exam Practice For more information see FCC & FAA Exam Practice Amateur Radio Design RADIO AND AUDIO CALCULATIONS AMATEUR RADIO AND AUDIO CALCULATORS - Wirral, U.K. VERY VERY EXTENSIVE. For more information see the Amateur Radio on the Wirral or the John's Home Page Some examples from over "20" calculators include Antenna EiRP Estimator Single-Layer Coil Designer PMR Crystal Calculator Op-Amp Circuit Design Audio Pre-Amplifier Design CONVERT & CORRECT DIAL READINGS CONVERT GR821A READINGS TO ADMITTANCE/IMPEDANCE (JAVA APPLET) - K. Schmidt, Department of Physics and Astronomy, Arizona State University "Applet to convert and correct dial readings..." For more information see Kevin Schmidt's Home Page VSWR CALCULATIONS VSWR CALCULATOR - P-N Designs, Inc. VERY EXTENSIVE. For more information see Microwave Calculators or Microwave 101 VSWR CALCULATOR - Andrew Corporation VERY EXTENSIVE. For more information see Calculators; Base Station Antenna or Andrew Corporation Antenna ANTENNA SYSTEMS ANTENNA ELMER - E. Oros & B. Cocco, The Elmer HAMlet VERY VERY EXTENSIVE. For more information see The Elmer HAMlet Some Examples from over '20' Calculators include Design Your Own Ground Plane Design Your Own Dipoles And Inverted Vees Calculate Electrical Length Of A Line ANTENNA SYSTEM EVALUATOR ANTENNA SYSTEM EVALUATOR - CALCULATOR - VanVarden VERY EXTENSIVE. For more information see the VanVarden family web page BEAM ANTENNA & HALF WAVE DIPOLE CALCULATIONS 3 ELEMENT BEAM ANTENNA CALCULATOR & HALF WAVE DIPOLE CALCULATOR - J. Hawkins For more information see Jim's Home Page CUBICAL QUAD ANTENNA CUBICAL QUAD ANTENNA CALCULATOR - VanVarden VERY EXTENSIVE. For more information see the VanVarden family web page LINEAR ANTENNA LINEAR ANTENNAS (JAVA APPLETS) - Amanogawa VERY EXTENSIVE. For more information see Linear Anatennas or Amanogawa Some examples from over '4' Applets include Array of Two Linear Antennas Uniform Array of N-dipoles MULTI-ANTENNA ANGULAR RADIATION PATTERN MULTI-ANTENNA ANGULAR RADIATION PATTERN CALCULATOR - XTR Systems, LLC VERY EXTENSIVE. "...computes the Far-Field Angular Gain Spectrum (aka Gain Spectrum) of an group of antennas and presents those results in a two-dimensional graphical format..." For more information see Radio Astronomy Projects Index or XTR Systems PACKETRADIO OPERATOR'S ANTENNA HANDBOOK THE PACKETRADIO OPERATOR'S ANTENNA HANDBOOK - G. E. Rogers Sr. For more information see PacketRadio's Home Page Examples of Calculators/Tutorials include Design a J-Pole Antenna for your Packet Radio Station Design-A-Quad Antenna T-NETWORK TUNER SIMULATION T-NETWORK TUNER SIMULATION (JAVA APPLET) - K. Schmidt, Department of Physics and Astronomy, Arizona State University "T-network tuners are popular for matching antennas for 160 through 10 meters..." For more information see Kevin Schmidt's Home Page YAGI ANTENNA MODELING YAGI ANTENNA MODELING APPLET (JAVA APPLET) - K. Schmidt, Department of Physics and Astronomy, Arizona State University For more information see Kevin Schmidt's Home Page Call Sign AUTOMATIC SOURCE CODE GENERATOR AUTOMATIC SOURCE CODE GENERATOR - M. Sullivan "I am using the Microchip PIC16C54 to make radio beacons with CW identification. This page will automatically generate the PIC source code for the beacon with your call sign." For more information see Mark Sullivan's Amateur Radio Resources CALLSIGN DATABASE CALLSIGN DATABASE SERVER - Amateur Radio Club, University of Arkansas, Little Rock, Arkansas "This callsign database is updated daily and is derived from FCC license data...We hope it will be a useful resource for new hams waiting for their license and current hams waiting for an upgrade." For more information see University of Arkansas Little Rock's Amateur Radio Club Distance & Location FOR DISTANCE & LOCATION CALCULATORS SEE NAVIGATION CALCULATORS: DISTANCE & LOCATION SOME EXAMPLES GREAT CIRCLE DISTANCE CALCULATOR - Wirral, U.K. For more information see the Amateur Radio and Audio Calculators; Amateur Radio on the Wirral or the John's Home Page HAM-RADIO QTH/DISTANCE/DIRECTION CALCULATOR/VISUALIZER (JAVA APPLET) - K. Evers, Bremen, Bundesrepublik Deutschland (Germany) VERY EXTENSIVE. For more information see Klaus Evers Home Page Frequency & Wavelength AMATEUR RADIO FREQUENCY SAFETY CALCULATOR AMATEUR RADIO FREQUENCY SAFETY CALCULATOR - University of Texas Amateur Radio Club, University of Texas, Austin, Texas In English & French/Français. "...a main beam power density estimation program intended for use as part of a routine evaluation of RF safety compliance with FCC regulations..." For more information see University of Texas Amateur Radio Club Grid Location FOR GRID LOCATION & DISTANCE/LOCATION CALCULATORS SEE NAVIGATION CALCULATORS: DISTANCE & LOCATION SOME GRID LOCATION EXAMPLES FIND OUT WHERE YOU ARE! - Alun Jones, Institute of Biological Sciences, University of Wales, U.K. "Just fill in the form with your location. You can fill this in using lat/long, NGR or QRA locator and it will convert between them. I t's reasonably clever at spotting just what you typed in" For more information see Da Penguin's Radio Page GRID SQUARE CALCULATOR - American Radio Relay League, Inc., Newington, CT "Amateur Radio uses a bewildering array of "location" schemes. Latitude and longitude are basic, being used for such arcana as satellite tracking and as the basis of the Maidenhead Grid Locator system." For more information see Grid Info; ARRL Web Location Services or the American Radio Relay League (ARRL) Examples or other calculators include ARRL Locator: Location by City and State WORLD WIDE LOCATOR MAP VIEWER - P. Grandjean, F6KIM, Sciences et Techniques Nancy, France In English & French/Français. For more information see F6KIM

Acoustics, Hi-Fi, Sound Systems

Acoustics & Noise Exposure ACOUSTICS CALCULATIONS ACOUSTICS CALCULATORS (JAVA SCRIPT) - EnviroMeasure Noise & Vibration Consultants, UK VERY EXTENSIVE. For more information see EnviroMeasure Noise & Vibration Consultants, UK Examples from the current '16' Acoustics Calculators include Calculation of Frequency Weightings (A,C,U and AU) Calculation of Infrasonic Frequency Weightings Loudness Calculator (Stevens Method) Speed of Sound Calculator Vibration Isolation - Transmissibility ACOUSTICS CALCULATORS FOR THE INTEGRATION OF SOUND AND VIDEO SYSTEMS - Mc Squared System Design Group, North Vancouver, BC, Canada VERY VERY EXTENSIVE. "We are focussed on the integration of the sound and video systems and the architectural environment the systems operate in." For more information see JavaScript Features Page or Mc Squared System Design Group Some examples of over '16' Acoustics Calculators include Decibels and Distance Calculator Quickie 2kHz Reverb Time Calculator Room Mode Calculator The Speech Intelligibility Calculator Wavelength of Sound Calculator ACOUSTICS: ANIMATIONS & DEMONSTRATIONS ACOUSTICS & VIBRATIONS ANIMATIONS - D.A. Russell, Applied Physics, Department of Science & Mathematics, Kettering University, Flint, Michigan Multimedia Interactive Tutorials (Text, Images, Animations & Movies). VERY VERY EXTENSIVE. For more information see Daniel A. Russell's Home Page; Applied Physics; Department of Science & Mathematics or Kettering University Some examples from over "30" Animations/Demonstrations include Refraction of Sound Waves Comparing Circular and Sinusoidal Motion 1-DOF Mass-Spring Systems with Damping Acoustics of Baseball Bats MUSIC ACOUSTICS - J. Wolfe, Music Acoustics Group, Department of Environmental and Applied Physics, School of Physics, University of New South Wales, Sydney, Australia Multimedia Interactive Tutorials (Text, Images, Animations & Sound). VERY VERY EXTENSIVE. For more information see Joe Wolfe's Music Home Page; Joe Wolfe's Home Page or the School of Physics Some examples from over "80" Tutorials include What is a Sound Spectrum? Vocal Tract Acoustics An Interactive Introduction to the Orchestra Flute Acoustics ACOUSTICS CALCULATIONS - ROOM ACOUSTICS - REVERBERATION TIME PROFESSIONAL AUDIO CALCULATORS - Doctor ProAudio Includes: SPL Calculator, Ceiling Speaker Coverage Calculator, Millisecond/Microsecond < > Metres/Feet/CM/Inches Calculator, Air Absorption Calculator etc... For more information see Doctor ProAudio ROOM ACOUSTICS ARCHITECTURE CALCULATOR (JAVA APPLET) - Hunecke Consult, Germany VERY VERY EXTENSIVE. In English & German/Deutsch. "With the following program you can easily calculate reverberation times and design the acoustics for your room..." For more information see Calculators or Hunecke Consult ROOM ACOUSTICS HIFI CALCULATOR (JAVA APPLET) - Hunecke Consult, Germany VERY VERY EXTENSIVE. In English & German/Deutsch. "...allows you to calculate the reverberation time and the frequency response of the loudspeakers in your listening room..." For more information see Calculators or Hunecke Consult ROOM ACOUSTICS EIGNEMODE CALCULATOR (JAVA APPLET) - Hunecke Consult, Germany VERY VERY EXTENSIVE. In English & German/Deutsch. "...allows you to calculate the frequencies of the Eigenmodes in your listening room..." For more information see Calculators or Hunecke Consult RT60 ACOUSTICS CALCULATOR - TSC/Trinity Sound Company VERY EXTENSIVE. "RT60 is an acoustical measurement used to calculate reverb time decay." "Materials include: Brick, Drapery, Glass, Marble, Plaster on Lath, Plywood Paneling, Wood, Terrazzo, Tile etc." For more information see Tech Talk or TSC/Trinity Sound Company NOISE EXPOSURE CALCULATIONS CALCULATION OF ROAD TRAFFIC NOISE - CALCULATOR - National Physical Laboratory (NPL), U.K. VERY EXTENSIVE. For more information see NPL Acoustics: Technical Guides; NPL Acoustics; Science at NPL; National Physical Laboratory NOISE EXPOSURE CALCULATORS - Rigolett, The Netherlands VERY EXTENSIVE. For more information see Noise & Traffic Some examples include Road Traffic Noise Calculator Calculations with sound power level for industrial areas NOISE EXPOSURE CALCULATOR - Tony Woolf Acoustics, U.K. "...The calculator works out noise exposure or "dose" in accordance with the UK Noise at Work Regulations..." For more information see The Law of Noise; Hearing Protection or Tony Woolf Acoustics Sound AMPLIFIER: STEPPED & SHUNT ATTENUATORS RESISTOR STRING VALUE CALCULATOR FOR CONSTRUCTING STEPPED ATTENUATORS - N. Roberts, RSS Consultancy, U.K. VERY EXTENSIVE. For more information see the Neville Roberts' Home Page RESISTOR VALUE CALCULATOR FOR CONSTRUCTING SHUNT ATTENUATORS - N. Roberts, RSS Consultancy, U.K. VERY EXTENSIVE. For more information see the Neville Roberts' Home Page SPL CALCULATIONS - STAGE/THEATER SPL CALCULATOR - C.M. Collins VERY EXTENSIVE. "...will compute the predicted maximum sound pressure level (loudness) at the listening position..." For more information see Collins Cinema - My Home Theater SEEING WITH YOUR EARS SOUNDSCAPES FROM "THE vOICe'': SEEING WITH YOUR EARS? (JAVA APPLET) - P.B.L. Meijer, Visual Prosthesis for the Totally Blind "This fully interactive page allows you to draw your own 64Ýx 64, 16 grey-tone image and immediately hear the corresponding 64-voice polyphonic soundscape being synthesized on the fly!" For more information see Visual Prosthesis for the Totally Blind Speaker Design HOW A SPEAKER WORKS HOW A SPEAKER WORKS (JAVA APPLET) - Java programming: K.I. Tchourioukanov; Author: M.W. Davidson, Molecular Expressions: Exploring the World of Optics & Mircroscopy, Florida State University "...In this tutorial, the circular magnet is cutaway so that visitors can observe how the speaker operates." For more information see the Electricty & Magnetism Interactive Java Tutorials or Molecular Expressions: Exploring the World of Optics & Mircroscopy CIRCUIT, BOX & SPEAKER DESIGN DIY AUDIO: CIRCUIT & BOX DESIGN CALCULATORS - M. LaLena VERY VERY EXTENSIVE. For more information see Michael LaLena's Home Page Some examples from over "8" Calculators include Box Designer Series Notch Filter Designer Impedance Equalization Circuit Designer ISHTEK THIELE-SMALL SPEAKER DESIGN - CALCULATOR (JAVA APPLET) - Ishtek VERY EXTENSIVE. "The speaker design program which you can access via this page uses Thiele-Small parameters for a speaker, and allows you to calculate various designs. The two primary style of speaker designs handled by the program are horn-loaded cabinets and vented cabinets." For more information see Speaker Design Page or ISHTEK CROSSOVER CROSSOVER CALCULATORS - Select Products VERY EXTENSIVE. Includes: Crossoverparts Calculator, Narrow Band Pass Calculator & Zobel Networks Calculator. For more information see Select Products HORN SPEAKER DESIGN HORN SPEAKER DESIGN (JAVA APPLETS) - J. Melhuish For more information see James Melhuish's Audio & Music Home Page or James Melhuish's Home Page Examples of Applets include Exponential/Hyperbolic Contour Calculator Tractrix Contour Calculator LOUDSPEAKERS DESIGN LOUDSPEAKERS DESIGN - Online Connections Inc. Multimedia Tutorials (Text, Images & Calculators). VERY EXTENSIVE. For more information see Obsession Audio Some examples from over "15" Calculators/Tutorials include Speaker Crossover Chart and Capacitance vs. Frequency Calculator(High-pass) 4th Order Butterworth Calculating Driver Reference Efficiency LOUDSPEAKER PASSIVE CROSSOVER CHOKE COIL LOUDSPEAKER PASSIVE CROSSOVER CHOKE COIL CALCULATOR - R.A. Booty VERY EXTENSIVE. "...calculates inductance, reactance, overall diameter, length of wire, DC resistance, and weight of a choke..." For more information see Robert A. Booty's Home Audio Projects Examples of other Calculators include Helmholtz Resonance Calculator Capacitive and Inductive Reactance vs. Frequency

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