short transmission lines

Cedevita-20 Antenna - The Cedevita-20 is a hybrid monoband antenna, the result of merging the radiator of a shortened vertical with one element of a dipole. It fits on most balconies and must be hung from the ceiling. By ik1zyw Paolo Cravero

Transmission Lines - Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.

Transmission Lines - Articles on SWR measurements and feed lines tuning.

Transmission lines for dummies - Myths and basic truths on transmission lines

A Magnetic Loop antenna for 7-21 mhz - If you find external wire antennas obtrusive for amateur radio or short wave listening, then this is the antenna for you, is just 1 meter diameter

Derby City Radioactives - The Derby City Radioactives is an organization of hobbyists and enthusiasts involved in multipule aspects of radio communications including CB and Ham (Amateur)radio,FRS/GMRS,Scanning,Shortwave Listening and the new Multi-Use Radio Service(MURS)

IOTA Groups and Reference Numbers - Short Format List of IOTA Groups and Reference Numbers

Auckland ATV Group - The ATV User's Group is a subgroup of the Auckland VHF Group, Club call ZL1BQ, compromising of persons interested in the transmission and reception of Amateur Television

Ham Lake, Minnesota IC-PCR1000 - The system consists of a Icom IC-PCR1000 shortwave radio. Coverage is from 10 KHz to 1300 MHz.. Antenna is a Par Electronics EF-SWL in and sloper configuration.

KVK Antenna Systems - The manufacturer of the NuBeam, Vipole, and the multi-band Quad-Folded-Dipole (or QFD for short) antenna. Also have a unique multiband vertical which can combine operation on multiple HF frequencies as well as provide high gain on 50, 144 and 438MHz in a single antenna.

Sounds Sweet Communications Speakers - Speakers for Amateur Radio, 2-Way Radio, Shortwave and Scanner listening

Fax480 - FAX480 was developed to provide for relatively high resolution image transmission on HF, VHF, and UHF amateur radio bands. FAX480 was designed to bridge the gap between conventional slow scan television (SSTV) and conventional facsimile techniques.

PSK63 - A super-fast PSK mode for RTTY Contesting, 100 wpm character transmission speed for contest exchanges and macro transmission versus RTTY at 60 wpm

The DX Handbook - Free huge and reliable BCL reference for shortwave enthusiasts. Includes a large schedule list diveded by bands. Is mainly in italian, but schedule listings are easy to understand. Edited by Enrico Oliva

Alfa Lima International - A free radio station that is transmitting world wide on several shortwave frequency 's with loads of pirate and freeradio information.

Shortwave Radio Appraisal Tool - Just fill out a form and LessWaiting.com will appraise the value of your shortwave radio instantly, free of charge.

Smith Chart Software - SimSmith is a highly interactive, real time Smith chart graphing program. Circuits are constructed using drag-n-drop. Load files can be imported from the EZNEC and CocoaNEC antenna simulation software and from the AIM4170 and miniVNApro antenna analyzers. Circuits and load files can be of any size. Key Features: SimSmith is one of the few Smith chart packages which models transmission line losses. SimSmith also allows the description of circuit elements using algebraic equations. SimSmith has only one screen and allows the screen to be resized to increase workspace or readability.

TLE for windows - Transmission Line equations for Windows. Written in Visual C++. This program provides the most comprehensive analysis of a transmission line by w9dmk

XLZIZL by AC6LA - XLZIZL is an Excel application that analyzes the components of an antenna feed system, including transmission lines, stubs, baluns, and tuners. Calculations include impedance transforms, SWR and reflection coefficient, power loss, voltage and current standing waves, stress on tuner components, network attenuation (S21), and return loss Analysis results are available in worksheet format and in five different chart formats, including Smith charts.

WD6CNF DSP Filter - Audio Digital Filter, two bandpass filters, three notch filters, two noise filters graphical setting of filter center frequency and bandwidth Drag vertical lines on top of signal, Microphone input, speaker output Mono, 5 kHz bandwidth

DigiACE - DigiACE is an experimental Digital SSTV system. The latest version is posted as DigiACE.zip DigiACE uses the RDFT transmission system with some enhancements

Shortwave Log (SWLog) - Shortwave Log, SWLog is a comprehensive logging and radio control program. While designed for shortwave and mediumwave listening, the program is quite adept when listening to longwave, utility, or amateur radio. Support Icom Drake TenTec Yaesu JRC and lowe receivers.

High Performance Software Defined Radio - The HPSDR is an open source, GNU type, hardware and software project intended as a "next generation" Software Defined Radio (SDR) for use by Radio Amateurs and Short Wave Listeners

RF Coaxial Connectors - RF coax(ial) connectors are a vital link in the radio spectrum. Coax connectors are often used to interface two units such as the antenna to a transmission line, a receiver or a transmitter. The proper choice of a coax connector will facilitate this interface.

Safety: RF awarness guidelines - Although Amateur Radio is basically a safe activity, in recent years there has been considerable discussion and concern about the possible hazards of electromagnetic radiation (EMR), including both RF energy and power frequency (50-60 Hz) electromagnetic fields. This section summarizes what is now known and offers safety precautions based on the research to date.