range calculator

Online Antenna Calculator - Java script antenna calculators for ground planes, half wave verticals, quad antenna, 5/8th wave vertical antenna, dipole and inverted vee antennas

Online Dipole Antenna Calculator - Online calculator and construction instructions

VSWR Loss Calculator - This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR (voltage standing wave ratio) and other subsequent factors

5/8 Wave Vertical Antenna Calculator  ^{updated  pop} - Design your own 5/8 wave vertical antenna. A simple jscript calculator at Antenna Elmer.

CantennaCalc - Kioan's calculator for building a Cantenna , directional waveguide antenna for long-range Wi-Fi

KB9OHY Orange County Amateur Radio Club - The O.C.A.R.C. site has all the information you need to use our club's repeater and EchoLink node

Orange conty radio amateurs - ARRL Special Services Club, Orange County, North Carolina

Solarcon Antennas - Solarcon custom designs and manufactures a wide range of standard and specialized antenna products, Patch Antennas, Loop Antennas, Helical Antennas, Yagi Antennas, Slot Antennas, UHF Antennas, VHF Antennas, Bluetooth antennas, Dipole antennas and many more.

Verdant - Designer and manufacture of Airborne Antenna & Radomes covering a range of applications. Products include vhf antenna ,uhf antenna,navigation antenna,comm antenna,blade antenna,vor/ils antenna ,L band antenna, direction finding antenna,DF antenna,vor,ils, IFF antenna on aircraft,aircraft antenna for airborne application.

Tecom - Tecom industries product line encompasses a wide range of highly sensitive active and passive antennas for use in airborne and ground applications, providing complete coverage of the 20 MHz to 40 GHz frequency range.

marnic.org - F5VLB and EA4EOZ have designed a small but powerful system using satfinder and standard LNB to make radioastronomy. A step by step descritpion for the novice about radioastronomy, VLB and listening to echo of meteorite.

Calculate azimuth and elevation - Use this online calculator if you need to know your azimuth/elevation relative to a satellite

Here Comes the Sun - Propagation and Sun - Solar activity can aid or hamper HF propagation beyond line-of-sight range, WA1SVF and N6BV answers to questions about Sun influence on radio signals propagation

IC-7000 Mods - IC-7000 TV Enable Reception, ) TVRO & MARS (US version), TVRO & MARS/CAP Mods by N5AC, IC-7000 RX range expand mod, IC-7000 Tone noise, How to fix the IC-7000 audio noise

FT-450 Mars Mods - Mars Mod for Yaesu FT-450 extending frequency range: 1.8-30 MHz

TH-D7 Data communicator - Kenwood TH-D7 details. Kenwood's new TH-D7e is equipped with a TNC and provides a wide range of data communications options

THD-7 Mods - Expanding tx range of a TH-D7A

Yaesu VX170 Mod - Extend VX-170 frequency range on Yaesu VX-170

Microwave Antenna Design Calculator - Available to run on all major operating systems, this free calculator provides quick estimation of antenna size required for a given gain and frequency.

Signals Analyzer - Signals Analyzer – it is the program, which is designed for the very qualitative analysis of different signals. The main area of SA application is the analysis of unknown or unclear, strange signals.

Javascript Programs for Amateur Radio - GØHZK javascript calculators for ham radio, distance calculator, locator calculator, UTM calculator

Signals Analyzer - Signals Analyzer – it is the program, which is designed for the very qualitative analysis of different signals. The one of main fields of SA application is the analysis of unknown or unclear, strange signals. This programm will be very usefull to everyone from professional analysts to amateurs.

Resonant Frequency Calculator - This web based application will compute circuit values required for an L-C circuit to resonate at given frequency. Also it will compute the resonant frequency if given values for L and C.

Electronic calculator - Some simple electronics calculator in javascript

Coaxial Stub Filters - A range of easy-to-build RFI filters by John Regnault, G4SWX