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KC0TKS Antenna Calculators - Allow calculation of a dipole, 3 element yagi and a vertical antenna

Inverted Vee calculator - Online calculator for dipole and inverted vee antennas

Better Feedline Loss Measurements with Antenna Analyzers - Various publications through the years have shown how the SWR measured on a shorted (or open) feed line can be used to calculate feed line attenuation

AA3RL Transmission Line Calculator - Excel spreasheet that calculate virtually every transmission line parameter that one may need. Include Length conversions, Reactance and Length of Stubs

2 Meter Jpole Calculator - build your own 2 meter JPOLE Antenna

Log Periodic - MSDOS program calculates dimensions of log-periodic antennas by YU1AW

An Unusual Magnetic Antenna - This article by OK1FOU describes how to build a relatively small loop antenna which can be placed for instance at the balcony. It is especially suitable for a two band antenna covering two adjacent amateur radio bands (10/14 MHz, 14/18, etc.)

Vintage Radio and Communications Museum of Connecticut! - We are a non-profit organization dedicated to the preservation of vintage communications equipment and the education of the public about its history.

DXCC List with your beam headings - You can have your persolal DXCC country list with correct beam heading calculated on you grid square location by ok2pbq

M0EDX - British amateur radio station ex UT7CT anton koval

Boston-Area University Police Radio - Police and Security Broadcasts at Harvard University, Boston-Area University Police Radio. Cambridge; Boston.

QTH Locator map - Click on the map and the QTH locator will be calculated

NashvilleAPRS - NashvilleAPRS is a website designed to help APRS users in Middle Tennessee have a single, knowledgeable resource on APRS in the area.

Parabolic - This program calculates geometry, gain, losses, efficiency, directivity pattern and other parameters of primary fed and offset parabolic antennas.

TANT 136 - DOS program for calculating the performance of a T antenna. Gives loading coil info and matching plus ERP by Reg G4FGQ

TubeCalc - Input (grid or cathode) and output (plate) tube resistances calculation according to its electrical characteristics, frequency, mechanical dimensions and working conditions.

HeliCoil - Inductance calculation for single layer, air-wounded coils and helixes up to about 800 MHz. Inductance calculations accuracy is around 1%. Also, coils with maximum Q for given inductance, resonant RF chokes, PI and T resistive attenuators calculations are provided. Skin effects, radiation losses and other minor side effects are not accounted in maksimum Q factor coils calculations. Program assumes using copper (Cu) enameled or silver (Ag) plated wire. Program is writen bilingual in English and Serbian by YU1AW

RF Filters - MS DOS Program for calculations of HP, LP and BP filters at VHF and UHF frequencies up to about 800 MHz by YU1AW

Networks - Calculate impedance matching networks by YU1AW

MatchNet - This program calculates impedance matching for tube and solid-state PA, LNA, antenna match-box, interstage impedance matching and all other impedance matching in electronic and telecommunication.

Morse Code translator widget - Macintosh widget converts text to Morse code and vice versa

Geosat - MSDOS program to calculate Az-El position of geostationary satellites at specific location and carrier to noise ratio of received SAT TV signal.

Mini Ring Core Calculator - The easy way to calculate toroid cores.

T-Pad / H-Pad Resistance Calculator - This calculator is designed to give resistor values for unbalanced T-pads, and for balanced H-pads.

Toroid Winding Calculator - Choose Iron Powder or Ferrite and calculate required turns