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Audio Test Oscillator
https://www.sound-au.com/project22.htm
Introduction. As a piece of test equipment, an audio oscillator has to be considered essential for anyone working in with hi-fi gear. Together with an audio millivoltmeter (as described in Project 16), and even better if you have access to an oscilloscope, you will be able to make proper measurements on everything from preamps, RIAA equalisation stages (for vinyl disks), tone …
Audio & Test Oscillator - HP Memory Project
http://www.hpmemoryproject.org/wb_pages/wall_b_page_10a.htm
Audio Oscillator . Introduced in the 1961 catalog, the 204B was the very first fully transistorized and battery-operated HP audio oscillator. In the beginning of the sixties, the main and most visible advantage of transistors over vacuum tubes was frequently brought to the foreground in publicity for a new instrument.
Audio Oscillator | Discrete Semiconductor Circuits ...
https://www.allaboutcircuits.com/textbook/experiments/chpt-5/audio-oscillator/
The proper name for this circuit is “ astable multivibrator ”. It is a simple, free-running oscillator circuit timed by the sizes of the resistors, capacitors, and power supply voltage. Unfortunately, its output waveform is very distorted, neither sine wave nor square. For the simple purpose of making an audio tone, however, distortion ...
Universa l A udi o Test Oscillator 930
http://lcweb2.loc.gov/master/mbrs/recording_preservation/manuals/UREI%20Universal%20Audio%20Model%20930%20Test%20Oscillator.pdf
Test Oscillator 930 30. OFF· .700 .10K 930 TEST OSCILLATOR The Universal Audio 930 F.E.T. Amplitude Stabilized Test Oscillator is an ultra-compact source of low distor tion sine wave test signals, designed especially for use in recording, broadcasting and motion picture sound facilities.
"Audio Test Oscillator" - www.RADANPRO.com
http://www.radanpro.com/Radan2400/TestShematics/Audio%20Test%20Oscillator.htm
Introduction. As a piece of test equipment, an audio oscillator has to be considered essential for anyone working in with hi-fi gear. Together with an audio millivoltmeter (as described in Project 16), and even better if you have access to an oscilloscope, you will be able to make proper measurements on everything from preamps, RIAA equalisation stages (for vinyl disks), tone …
Quick and less-dirty audio test oscillator | Online ...
https://diy-layout.com/74
Project description. I use this sine generator when I need to debug a project using an audio probe. Before building this, I had to strum my guitar and then quickly probe my project before the guitar signal was dead.
An Ultra Low Distortion Audio Test Oscillator - Internode
http://www.users.on.net/~endsodds/ao.htm
An Ultra Low Distortion Audio Test Oscillator This project was published in the March 2010 issue of the Australian magazine "Amateur Radio", and uses a unique circuit and cheap readily available components to acheive laboratory grade performance.
Miniature Audio Oscillator
https://www.sound-au.com/project86.htm
The above is for the oscillator built exactly to the schematic shown, and with frequency setting capacitors and switching as indicated. The PCB version is identical These figures can be expected to be representative of performance with most opamps designed for audio usage.
Simple Oscillator Circuits - Making Easy Circuits
https://makingcircuits.com/blog/simple-oscillator-circuits/
Simple Relaxation Oscillator using a Single BJT. The negative resistance area of a reverse-biased silicon transistor can be applied in a relaxation oscillator circuit. Its benefit is that an excess transistor is utilized instead of a UJT, which is generally more expensive, and it does deliver a minimum of components.
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