Pultec EQP clone problem
Ralph Boring wrote:
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OK, so you claim that you used your own transformer and It 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
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