emi filter

GI4SJQ CobWebb Antenna - GI4SJQ Cobwebb antenna plan with pictures and notes

Central Kentucky Amateur Radio Society - Our purpose is to have fun with Amateur Radio, to help others that wish to join the hobby, and to offer assistance to our community in times of eminent danger or disaster.

Chemineer International Ltd - Soldering accessories and tools, masks, paste

Agilent - The premier measurement company advancing electronics, communications, make signal generators,oscilloscopes, meters, multimeters, voltmeters, power analyzers

Hameg Instruments - Spectrum Analyzer, Oscilloscopes, EMI Measurement and Power Supplies German test equipment maker

Demis Web Map Server - A good online map service useful for ACARS map generation

Hellschreiber frequencies - Suggested frequencies for HELLSCHREIBER operation by the feldhell club

Hellscreiber sample - A sample picture of a Hellschreiber CQ call

Yaesu VX-2R technical supplement - The Yaesu VX-2R technical supplement manual delivered by radioamateur.eu in a 44 page pdf file

LCLAYOUT drawing software - Simple inexpensive program that allows L-C filters designed by PCFILT or S/FILSYN which are to be built using air wound inductors and single layer capacitors cut from alumina or duroid substrate materials

ALK Engineering - Alk engineering - filter design software and consulting

FILPRO - The most flexible and powerful Microwave and RF Filter and Multiplexer Design Software

Nuhertz Technologies - Leading supplier of low and high frequency electronic filter design products for the design of wireless telecommunications equipment, semiconductors and more

Omicron filter design - Electronic filter design software by omicron is the best for developing active filter, passive filter, and digital filter - check out our products and ordering information.

Filter Wiz Pro - Schematica software filter design program

Filtroid - Filtroid is an extremely easy-to-use program for synthesizing microwave filters. It can be used to design practically all filter types from audio to microwave frequencies as well as amplitude and delay equalizers and attenuators.

ScopFIR - Free windows comprehensive tool for Finite Impulse Response (FIR) filter design

FilterCAD - A free computer aided design program to help users without special expertise in filter design to create filters using Linear Technology's monolithic filter ICs. With FilterCAD, you can design lowpass, highpass, bandpass and notch filters

AADE Filter32 - ADE Filter Design and analysis is a free for download windows program to design filters

DXFile - Windows shareware logging program, offer several features like packet radio interface, web cluster, grid square, beaming directions, qsl manager lookup, dx spot filtering by F6GQK in french.

Interactive Digital Filter Design - This is an interactive filter design package, for designing digital filters

LC Filter Design - This is an interactive design package for designing analogue (i.e. hardware) filters made of inductors and capacitors (Ls and Cs).

Online Microwave Filter Design and Analysis - This site is dedicated to design and analysis of micro- and millimeter wave filters from 0.5 to above 100 GHz.

The Ladder Filter - Article by Lloyd Butler VK5BR

TVi Basics - making filters - TV Interference filters, making TVI filters, coaxial filters to eliminate TV interferences caused by radio frequency