audio spectrum

Farallon Electronics - PACTOR mode radio modems and accessories, performance sailing electronics and innovative hard to find parts. Audio cables, packet cables, usb to serial converters

Anritsu - Provides technology and solutions for the electronic test and measurement, optical, rf and microwave, wireless, wired, telecommunications. Make Frequency Counters, Antenna and spectrum analyzers, power meters, signal generators

TekNet Electronics - Frequency conunters, multimeters, oscilloscopes, spectrum analyzers, power supply and RF network analyzers.

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

Link Instruments - Pc based test and measurement equipment and instrumentation: digital oscilloscope, logic analyzer and spectrum analyzer.

Yokogawa - Maker of optical spectrum analyzers, digital oscilloscope, digital power meters and more test equipmente related products

Applied Instruments - Applied instruments manufactures test and measurement equipment for the broadband telecommunications industry. products include carrier generators, signal level meters, rf switches, spectrum analyzers and a return alignment system.

BK Precision - Power supplies, electrical testers, battery analyzers, cable tester, rf generators, spectrum analyzers, Digital/Analog Oscilloscopes, Multimeters , attenuators, frequency counter

PROMAX Electronica - Spanish makers or signal generators, spectrum analyzers, testers

Ivie - Manufactures automatic mixers, analog and DSP signal processors, room combining and matrix mixers, and audio test equipment for just about any customer application.

Leader Instruments - Test Equipment Depot - New and pre-owned agilent, avcom, fluke, hewlett packard, instek, iwatsu, leader, lecroy, tektronix,and more. Analog oscilloscopes, spectrum analyzers, network analyzers, power supplies, video test equipment, generators, meters and more

Lehman scientific - New unused surplus and used electronic test and laboratory equipment including spectrum analyzers, signal generators and oscilloscope

Scientific Surplus - Buy, sell and trade electronic and scientific instruments. Oscilloscopes, microscopes, signal generators, RF equipment, short & long wave radios, meters and wattmeters, detectors (radiation, metal), spectrum & network analysers military equipment

Naptech - Naptech buys and sells quality test equipment from hp, tektronix, including spectrum analyzers & peripherals, oscilloscope, frequency counters timers, signal generators, multimeters & voltmeters, RF & power meters, microwave amplifiers

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.

EIS Spectrum Analyser - Freeware program for analysis and simulation of impedance spectra

Noise Figure Meter with a Spectrum Analyser - A relatively simple automatic Noise Figure (NF) meter was developed which is using a spectrum analyser as the receiver and logarithmic power detector.

Science Workshop - Home of the Poor Man's Spectrum Analyzer

A spectrum analyzer for the radio amateur - Good tools are priceless when you need them. Here’s a piece of test equipment you’ve always wanted for your workbench

A Spectrum Analyzer for the Radio Amateur—Part 2

W7ZOI / K7TAU Spectrum Analyzer - W7ZOI/K7TAU Spectrum Analyzer Constructed by N8QOH

W7ZOISA Spectrum Analyzer - My Version of Wes Hayward W7ZOI / Terry White K7TAU Spectrum Analyzer

Microwave spectrum analyzer - A practical approach to microwave signal analysis for the home experimenter

Harmonic Converter for Spectrum Analyzers - Extending the frequency coverage of spectrum analyzers, Harmonic mixer by Matjaz Vidmar, S53MV

Spectrum Analyzer building Project. - W6/PA0ZN CATV tuner based Spectrum Analyzer Building Project