spectrum circuit

Simple active antenna - This circuit shows an active antenna that can be used for AM, FM, and shortwave

Ham Radio India - Gateway to Indian Radio Amateurs. Resource features Indian amateur news, photos, circuits, articles, downloads, message boards and discussion forums.

PicoScope - Pico Technology have developed a wide range of professional PC-based instruments that offer all the functionality of conventional test equipment (DSO - digital storage oscilloscope, spectrum analyzer, meter), and also many features not normally available in this price range. Available functios are Oscilloscope, Spectrum Analyser, XY Scope, Meter and Measurements

VLF Natural Radio Discussion Group - Discussion group dedicated to those who enjoy monitoring radio frequencies in the VLF radio spectrum and slightly below the VLF spectrum (3-30 KHz).

UK Radio Frequency Bands - A guide from 0 Hz to 30 MHz The main bands, all frequencies in MHz unless otherwise stated

Spectrum Analyzers and Electronic Test Equipment - We sell a wide variety of new and used spectrum analyzers from leading manufacturers such as HP/Agilent, Anritsu, Tektronix and others.

LF Analyser - Professional analyser sound signals, scope, spectrum, spectrograph

HF Analyzer - Professional analyser HF signals, work with bandwidth 500Hz....60Mhz, ddc-mode, scope, spectrum

iSpectrum Analyzer - Macintosh audio spectrum analyzer that allows the user to view live audio in a standard frequency plot, a stereo oscilloscope view and a waterfall display

Morse Tutor - Morse Tutor is a DOS based program written in C++. It can be used to practice morse code. Various options are available. Morse tutor with Complete Source Code and Binary is available for Download (32KB).

GSpec - Spectrum Analyser for Win9x/2000 and NT, that will display audio input to your sound card in the Frequency and Time domains

HamAlyzer  ^pop Priority listing - HamAlyzer is a spectrum analyzer made just for hams, save plot images easily for emailing, monogramed with your call sign. HamAlyzer looks no more supported, here 2.8 trial version available. Download hamalyzer

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.

SIGVIEW spectrum analyzer - Complete real time signal analysis software with wide range of powerful FFT spectral analysis tools, statistics functions and comprehensive visualization system.

HAMIC - The Ham Intelligent Calculator - HAMIC, is a program designed to simplify a number of calculations commonly used by HAMs. It is designed for the HAM radio hobbyist, but may be useful to others as well. HAMIC has a simple to use, but powerful graphical interface that allows solving simple circuits such as resistors in series or parallel, or more complex circuits such as L networks or T networks. As well, other calculations such as SWR and reactance conversions are supported. Windows shareware.

Defpom's CB Radio Simulator - It is a application which can be used for troubleshooting CB radio faults, by giving a graphical display of the normal operating frequencies generated by various parts of the CB radios circuits, it can help you identify if a frequency is incorrect or even missing. Another good use for this software is simulating possible frequency expansions, as it allows you to choose any frequency that the PLL is capable of generating, so you can see what the radio will allow you to get !

KB2LJJ Radio Mods Database  ^pop - The KB2LJJ radio mods database offers approximately 12,000 Radio Mod's, circuits and manuals.

Electronic symbols - Analog digital symbols, identification of components, units and conversi„n tables for electronics circuits design

Introduction to spectrum analyzer - Explains the fundamentals of swept-tuned, super heterodyne spectrum analyzers and discusses the latest advances.

ACWS: Automatic CW Sender by iz7ath - Simple circuit, with a simple push, transmit a memorized Cw messages

Homebrew resources for wireless enthusiasts - PDF resources containing information on low cost ssb,am,cw circuits, which are useful for beginners.

F6BON Homebrew - Spectrum alalyzer, uhf shf test equipment

Regenerative Radio Receiver Circuit - Useful and well thought out regenerative receiver design

WD5HOH Regenerative(Regen) Receiver - This web page describes a small, single tuned circuit regenerative receiver primarily for daylight reception in the 16, 19, 22 and 25 meter international shortwave broadcast bands.

Build A Vector Network Analyzer - The VNA (vector network analyzer) is an essential tool for measuring the complex impedance of a circuit at a given frequency. Article on how to build a Impedance analyzer.