feed line calculation

Diplexer construction 2m/70cm and SW/VHF - Build your diplexer with more than 70db port isolation and less than 0.2db attenuation. Easy project.

DIY Basic Electronics and Antennas - DIY Basic Electronic Theory, Basic Antenna Theory with Antennas built from common materials. What does SWR really mean. Baluns from transmission line.

2 Meter J-pole from 450-Ohm Ladder Line  ^pop - Great first time J-pole project. Covers most of the basics. This small and thin design also makes it good for several stealth applications.

HF mobile antenna  ^pop - Build your mobile antenna which outperforms Hustler by 10db and ATAS-100 by 18db. From 80 to 10m.

RC.N Home of Radio Contesting - Interactive home for radio contesters. Includes scores database, access to contester chat, forums, real-time posting and near-real-time news feed.

OH6YF Log Search - Logs of: OH6YF, OF6YF, OG6YF, OI6YF, OH6Y, OG6Y, OH0MYF, OH0MYF/6, M0BYF, M/OH6YF etc... Over 140000 contacts online!

Ham Logs Online - Put your Ham Logs online, compare contest scores, send and receive electronic QSL requests and more. The place to see if you finally worked them!

TEARA - Triangle East Amateur Radio Association - Homepage of the Triangle East Amateur Radio Association, in central NC. This site has been online continuously since 1994!

VK Classifieds - Australia's busiest radio related classifieds site. Free instantly online adverts from the VK/ZL area.

on4dsq audio file website - MP3 recording files, dx-ing, photo's, dxclusters, railsystem, online logbook

KEPS Equipments for AO40 downlink - Complete receive system, downconverters, dishes, feeds and preamplifiers for AO40 satellite users

WD7S Productions - A collection of kits for control and protection of homebrew linear amplifiers

KEYCOM Characteristic Technologies - Millimeterwave/Microwave transmission lines and components, Cryogenic temperature application transmission cables and systems, Permittivity(Dielectric rate) and Permeabillity measurement systems, Antennas, Radar systems

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

Global Overlay Mapper - Dynamic Map Progam with 34 maps, 442 overlays, and realtime position/locator info. Online Demo available. 0-59c per map.

6 Meters Online - 6 Meters Online. A site for 6m enthusiasts with propagation reports, forums, webcams and more.

On-Line HF Propagation Prediction - *One single page* gives you an immediate overview of current shortwave propagation conditions at your location.

Norwegian Scanner site - Online database: downloadable database, updated monthly. In norwegian.

F.G. Best Communications - CB and Ham Radio Repair, Service, Modifications, Linears, Tweak And Peak, Wattmeter, microphone,kenwood,icom,galaxy,cobra,uniden,upgrades

Scanner Master Police Scanners - Police scanners by Uniden Bearcat Scanners, port radio scanners antennas parts or listen to live online emergency police broadcasts with radio frequency codes by Scanner Master

NEC-2 for MMANA - The utility "NEC-2 for MMANA" is intended for calculation of antenna models made and optimized in program MMANA and for construction and simulation of antenna models using input language NEC-2 and based on MMANA models.

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.

Axis Spectrum Analyzer - Axis Spectrum Analyzer allows you to record audio along with sincronized 31 band spectrum analyzer readings from any audio source to be inputed into Macromedia Flash movies in an easy to integrate way. The software can also be used to display real-time audio with customized visuals on video devices such as projectors, tvs,etc.

QRP equipment - Simple QRP rigs, Transceivers with single side band direct conversion receivers, Receivers, Frequency counters for QRP

SWR bridge - This SWR bridge works by sampling the amount of power flowing in each direction along the aerial feeder.