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Audio Test Oscillator - sound-au.com
https://www.sound-au.com/project22.htm
An oscillator is simply an amplifier whose positive feedback is greater than the negative feedback, resulting in a signal which is amplified over and over again (by the same amplifier) until the output can increase no further.
Audio & Test Oscillator - HP Memory Project
http://www.hpmemoryproject.org/wb_pages/wall_b_page_10a.htm
The 239A Oscillator is electricaly similar to the built-in oscillator used in the HP 339A distortion measurement set. The 239A covers from 10 Hz to 110 kHz in 4 overlapping decade ranges with 2 digit resolution. The output level is variable from 1 millivolt to 3.16 Vrms into 600 ohms.
Audio & Test Oscillator - Amazon Web Services
https://s3-ap-southeast-2.amazonaws.com/learnorgdata/Oscillators/Week+5/Audio+%26+Test+Oscillator.pdf
Every oscillator of the 650 series use a Wien Bridge basic circuit arrangement followed by a negative feedback amplifier and associated output attenuator and precision output amplitude metering circuit. The picture below shows the block diagram common to every test oscillator of the HP 650 series. Every oscillator of the 650 series covered a ...
"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
Universa l A udi o Test Oscillator 930 - Library of Congress
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.
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