range calculator

Broadband receiving antenna matching - This article addresses the subject of obtaining the best signal transfer from an antenna to the typical 50-ohm receiver input over a wide frequency range, with emphasis on medium-wave (500 – 2000 kHz), encompassing the standard AM broadcast band and the 160-m amateur band.

Introduction to PMR 446 Radio in UK - PMR 446 is a short-range radio system, usually using small walkie-talkies, which can be used by anyone in UK and does not require a radio licence

South Orange Amateur Radion Association - SOARA k6SOA South Orange Amateur Radio Association. Serving ham radio enthusiasts in south Orange County, California. We provide amateur radio training and testing. We support 6 repeaters and have monthly meetings.

EI8IC's HF Contest Resource Site - This HF contesting resource site has a large range of articles, tips and techniques, contest writeups, bandplans, links, and a fine range of Ham maps.

F8ABX Radio Blog - Informations ondes courtes et radioamateurs - Shortwave and ham radio news

Hamradioindia a website by vu2fd - a website by vu2fd with theory lessons, details on rules and regulations and planty of homebrew projects for radio amateurs, java calculators.

BSC Associates - A consultant's site with a wide range of material relating to antennas for many applications.

Valcom Fibreglass Whip Antennas - Manufacturer of Fibreglass Whip Antennas, Low and mediun Frequency, HF and VHF Antennas Specialized in the design and manufacturing of a full range of Beacon (MF), AM Broadcasting 540 - 1700 KHz, HF 1.7 to 30 MHz, VHF 30 to 156 MHz and UHF 200 to 500 MHz antennas.

PicoScope - Pico Technology have developed a wide range of professional PC-based instruments that offer all the functionality of conventional test equipment (DSO - digital storage oscilloscope, spectrum analyzer, meter), and also many features not normally available in this price range. Available functios are Oscilloscope, Spectrum Analyser, XY Scope, Meter and Measurements

Great Circle calculator - Excellent on-line java great circle calculator with perl source code and excel spreadsheet for gc calculations

Sunset Calculation - Sunset online calculator

WSJT/JT44 Forum - Meet users of the new and revolutionary WSJT/JT44 mode, ask for help, arrange skeds, learn how to run JT44 and WSJT.

Cfm Communications - CB Radio and 10 through 12 meter band radio dealer. Ranger Communications factory authorized dealer. Service 10 and 12 meter and CB radios.

Shopsolo.com cb radios - Small family run business based at London Heathrow and Poole which covers UK CB radio enthusiast Stock a range of CB radios and CB radio aerials and multiband radios and CB mounts and accessories.

MPE Calculator - Free RF exposure evaluation software for amateur radio

Design and build helix antennas - An on-line javascript calculator and quite a few pictures to show how to make a helix antenna.

atlc - Arbitrary Transmission Line Calculator. - Unix or linux programme atlc calculates the impedance of electrical transmission lines of totally arbitrary cross section.

Smith chart calculator - linSmith is a Smith Charting program, mainly designed for educational use. It allows defining multiple load impedances (different frequencies), and adding components (discrete components and line sections) in series and parallel. It plots the impedances on the screen, shows the values in table format, and is able to generate publication quality Postscript output.

HAMIC - The Ham Intelligent Calculator - HAMIC, is a program designed to simplify a number of calculations commonly used by HAMs. It is designed for the HAM radio hobbyist, but may be useful to others as well. HAMIC has a simple to use, but powerful graphical interface that allows solving simple circuits such as resistors in series or parallel, or more complex circuits such as L networks or T networks. As well, other calculations such as SWR and reactance conversions are supported. Windows shareware.

1.5 to 30 Mhz RF Amplifier  ^pop - This high range amplifier is very small [SB200 size] Vacuum variable input and output caps as well input and output switching.

JRC NRD-525 - Tout connaître sur le récepteur JRC NRD-525. All about the JRC NRD-525 receiver. EPROM, RS-232.

Microphone Wiring Diagrams  ^pop - Some mic wiring diagrams for ranger realistic alan, cobra, ge, uniden, yaesu, kenwood radios. Diagrams for the microphone connections on many of the common CB radios, as well as some popular Amateur radios.

Garex VHF preamp - It is available for spot frequencies in the range 40 - 250MHz, where a typical gain of 26dB can be achieved

Radio receiver dynamic range - The basics of radio receiver dynamic range performance used for specifying the performance of radio receivers used in radio communications systems.

BC210 Conversion for Noaa Satellites - Allow 137 Mhz range by Steve Warley