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Ralph Boring wrote:
=====================

OK, so you claim that you used your own transformer and €œIt rings at 34kHz,
exactly as in the link from Scott Dorsey.€�, which, if I can still
comprehend English, implies that both your transformer and Scotts rang at
34 kHz. Unfortunately, the picture that Scott posted showed the transformer
being driven with a 1 kHz square wave, which contains absolutely no 34 kHz
content, if Mssr Fourier is to believed. Please explain.

** One thing at a time:

1. What does " exactly as" really mean here ?

2. I did not use 1kHz - I used 3.5

3. Scott's tranny rings at circa 28kHz - undamped.

4. Energy to support ringing can come from a narrow band of frequencies - either side .

5. The FFT spectrum (ie dozens of vertical lines) shows " bump" around the visible ringing frequency.

6. That "bump" goes away when the tranny is loaded .

7. Strangely there is NO new line for the actual frequency.

So no frequency creation going on.



........... Phil