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Old 26th January 2013, 10:57 AM   #31
forr is offline forr  France
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Originally Posted by tommy1000 View Post
The articles describes how to measure distortion in capacitors.
Has anyone built the generator and notch filter and found them useful?
I built it, tt was a very ambitious project for me but I ended with success.
The settings of the adjustable resistors and calibration of the lot with the sound card were not easy, they may need new trims form time to time.
I sometimes get a burst of the 4th harmonic but did not identify its origin.
The amplitude stabilization using an opto-coupler like Janacek did seems to me preferable.
I did not measure caps with it yet, I mainly use it to check performances of amplifying circuits.
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Old 26th January 2013, 11:59 AM   #32
tommy1000 is offline tommy1000  Denmark
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Thank you for sharing this information.
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