These days, with 24 bit sound cards, there is actually little argument for a hardware based THD meter, other than DIY for fun (I did).
You can generate a good sine wave using a sound card, and then add Cordell's distortion magnifier, after which you feed the residual error signal back to the sound card for spectrum analysis.
Even the pro's do it this way these days.
Patrick
You can generate a good sine wave using a sound card, and then add Cordell's distortion magnifier, after which you feed the residual error signal back to the sound card for spectrum analysis.
Even the pro's do it this way these days.
Patrick
Why after more than 4years is this still in the Pass section of the Forum?
Design & Build
- Equipment & Tools
andrewT, one finds all sorts of pass inspired electronics here that could go into other sections eg phono, line stages etc ...
Separately, whatever happened to wensan ? His stuff was always a very interesting read .......
Separately, whatever happened to wensan ? His stuff was always a very interesting read .......
Yes, I'm sorry that we have lost contact. I met him back in 2010 or so,
and he even built a semi-tester for us.
I hope you are doing well, Wensan.
😎
and he even built a semi-tester for us.
I hope you are doing well, Wensan.
😎
If there is a phase difference between point A and point B, is the output THD?
I don't really understand how the circuit works.
I don't really understand how the circuit works.
That would be a problem. It is possible to use a phase shifter to adjust the
relative phase, or in the case of an amplifier you might find that frequency
where it is exactly in phase (or possibly 180 deg out of phase).
relative phase, or in the case of an amplifier you might find that frequency
where it is exactly in phase (or possibly 180 deg out of phase).
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