Tube DIY Asylum

RE: Listen for yourself

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This Post Has Been Edited by the Author

In Reply to: RE: Listen for yourself posted by cpotl on July 07, 2017 at 12:18:47

I'm pressed for time right now but a DHT is very linear. If loaded and driven correctly, and without NFB, there is not much of a mechanism for producing upper ordered HD.
"Norman Crowhurst wrote a fascinating analysis of feedback multiplying the order of harmonics, which has been reprinted in Glass Audio, Vol 7-6, pp. 20 through 30. Mr. Crowhurst starts with one tube generating only 2nd harmonic, adds a second tube in series (resulting in 2nd, 3rd, and 4th), and then makes the whole thing push-pull (resulting in 3rd, 5th, 7th, and 9th), and last but not least, adds feedback to the circuit, which creates a series of harmonics out to the 81st. All of this complexity arises from theoretically-perfect tubes that only create pure 2nd harmonics!"

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I believe there are studies showing that humans can hear well into the noise floor.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

Edits: 07/07/17

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