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Actual Antenna SWR - Easy for calculate formula which could be a wake-up call for you. The SWR value at the input of antenna cable is not a actual SWR of your favorite antenna.

Eliminating TX RF Feedback Problems - Malfunction of transceivers due to stray RF pickup is a common problem, especially when using end-fed antennas, high-impedance feedlines, or a poor ground counterpoise

CTDXCC W1AW/5 - The Central Texas DX & Contest Club (CTDXCC) is a group of Amateur Radio operators in the central Texas

All Time CQ WW Records - On these pages are presented the records for the CQ WW contest for every country that has ever entered a CQ WW.

K5QE VHF and Up Contest Site - VHF + multi-multi contest station from EM31 in East Texas

South Coast Amateur Radio Club Inc. - South Coast Amateur Radio Club, south of Adelaide. Contests, Field Day, License Courses, Repeaters, BBS & Clubrooms.

MCWA McHenry County Illinois

K9ILS Fulton County Amateur Radio Club

W3AD Lancaster Radio Transmitting Society - Lancaster Radio Transmitting Society Lancaster County, Pennsylvania

On Line Ham Radio Class - Ham Radio Class On-Line. A complete On-Line Course for the Technician, General or Extra Class amateur radio license.

VO1DK Everett - Amateur Radio Antennas, Amateur radio & scouting, sailing and related links to each.

Calvert County, MD Police and Fire - CalvertNews.info provides news and information for Calvert County, MD. Powered by the Calvert Independent.

CommsAudit - Commsaudit uk, i/q quadrature , hf receivers, rf, multicoupler, multicouplers, switch matrix, antenna matrices, masthead amplifier,, vhf receiver, uhf,

LU Argentina prefix map - LU Argentina Country CALL division Antarctic and South Atlantic prefixes and sufixes

UHF Reject filter - This filter is a 0.1 dB Tschebychev lowpass with a rejection of 90 dB or better at 430 MHz, and 0.2 dB insertion loss at 72 MHz.

UK Radio Amateurs Annual CW Table - The purpose of the table is to encourage CW activity on the HF bands and six metres. Each year participants start afresh and work as many DXCC entities on each of the ten bands as possible between 0000Z on 1st January and 2400Z on 31st December

Bergenscanner.com - Radio frequencies for Bergen County located in Northern New Jersey

KCOMM,Inc - The Ham Store, Amateur Radio, Ham Radio in San Antonio, Texas USA

Ham Repair - Ham Radio repair of all major brands and models, located in Carrollton, Texas, which is just north of Dallas, and have been serving the Amateur Radio community for over 20 years.

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

IC746 control - IC-746 control It’s as simple as point and click. Left click will turn counter clockwise, and right click will turn clockwise.

Class E - This program simplifies the design of the single-ended Class E amplifier. Operation is intuitive and encourages "tuning" and exploration.

Voice descrambler - This program descrambles band inverted encrypted transmissions, usually found on VHF/UHF. It uses a NCO (numerical controlled oscillator) to re-produce the originally inverted audio band. Use it only if legally permitted in your country. I assume no responsabilities deriving from its use. Standard disclaimer applies

ATPDEC - Atpdec is an open source program that decodes images transmitted by POES NOAA weather satellite series. These satellites transmit continuously, among other things, medium resolution images of the earth on 137Mhz. These transmissions could be easily received with an inexpensive antenna and dedicated receiver. For more information about receiving POES satellite images consult the rig site.

Soundcard Audio Tools and Toys - Soundcard audio tools and toys, experimental ideas and utilities. Signal Generator, Frequency-counter / instrument-tuner, Real-time Spectrum Analyser