lightning protection off

A model of a practical Ruthroff 1:4 balun - The 1:4 balun is of particular interest because it underlies many other configurations, and understanding it helps towards understanding the other Ruthroff balun configurations.

Log Periodic Antenna Design  ^pop - calculates the dimensions and spacings of the elements needed to build a log periodic antenna, given tao, sigma and the lower and upper cutoff frequencies.

Michigan Antique Radio Club - Michigan Antique Radio Club, or MARC. The MARC was officially founded October 19, 1985 at the Dillon Inn (now the Hampton Inn) in Lansing, Michigan. Our mission: To preserve the history and enhance the knowledge of radio, television and related disciplines

Jacksonville antique radio society - The official newsletter of the jacksonville antique radio society, highlighting jarsclub activities.

South East Europe Contest Club - This is official site of South East Europe Contest Club

Alabama QSO Party - This is the official site of the alabama qso party.these pages contain information about the 2005, 2006 and 2007 alabama qso party rules, information and results.

LA0FX Contest Logs - Offer various contest logging programs, for scandinavian contests, SPDX, PAXX, OK/OM Contests, IARU VHF Contest, Portugal Day DX contests, HSC contest, various polish and norwegian local contests and other utilities

SM Swedish Hams Call Sign Lookup - Search Swedish amateur radio operators by call-sign name, family name or city, service offered by SSA

Official CQ countries and Zone List - Official, and updated CQ Magazine Countries and Zone List available in various formats, text, word and excel formats.

Grants Pass Police Live Feed - Tune in live to the Grants Pass DPS police radio and Josephine County Sheriff's Office radio feeds.

Comtek Systems - COMTEK uses state of the art design and technology to offer every ham the most advanced antenna systems possible.

Comtechpst.com - High Power RF Amps - Comtech PST offers solid-state power amplifiers in frequency ranges from 1 MHz through 3.6 GHz, with output power levels ranging from 5 watts to over 30 kW

RAM Mounting Systems, Inc. - Ram mounting systems is a world leader for design and manufacturing of mounting applications. ram mounts offer more than 900 interchangeable components for unlimited uses and configurations.

Harbour Industries - Harbour Industries, the worldwide High Temperature and High Performance cable manufacturer, offers a wide range of Mil-Spec and Commercial designs such as NEMA HP3/HP4 and SAE AS22759

LEMO Connectors - Lemo offers over 50,000 circular connectors for a variety of industries including medical, military, and test and measurement.

DEHN, Inc. Surge & Lightning Protection Priority listing - Offering transient voltage surge suppressor, TVSS, patch cables, surge arresters, surge protectors for lightning and power surge protection for electrical equipment, IT networks, communication systems, data lines, relay systems and solid state controllers.

PD5DP Ham Radio Manuals - Another collection of manuals to download offered by PD5DP. Includes ham radio manuals for Icom, Kenwood, Yaesu, Diamond and AOR products

HMC Electronics - We offer brand name products including metcal, loctite, weller, hakko, kester, lindstrom, desco, fluke, 3m, xcelite, chemtronics, xuron, tech spray, excelta, intermetro, scc, luxo, ideal, micro care, and scienscope. Products for Electronic Assembly and Repair. MA USA

Crystal Radio Supply - Offering Crystal Radios, Kits, Parts, and Supplies for the Radio enthusiast. Your source for free powered radios.

Burghardt Amateur Center - Yaesu Kenwood Alinco AEA Icom Geochron Phillystran dealer. Offer used products, custom products external relay box, antenna input protector and repair service

Portal de la Radio Cubana - Radio Cubana by Instituto Cubano de Radio y Televisión official site

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

jLog - jLog is a modern Freeware Ham Log program that can run on all major platforms, e.g. Mac OS X, Mac OS, Linux/Unix, Windows, etc. It offers a nice, clean interface and allows efficient entry of QSOs. Import or Export of data using the standardized ADIF 2 format is possible to easily exchange data with any other decent Log program. Built-in CW Keyer, CAT control for many popular, rigs, DX Cluster tracking, call lookups

Ham Office - Professional multi funcion software for ham radio use. Mainlu a logging program with mapping functions, dx cluster module, label printing, award managements, exporting features and more. Currently only in german

SV1BSX Homebrew Corner - Offer a wide range of homebrewing projects mainly for VHF UHF operations. From vhf antennas to preamplifiers, chargers and power supplies