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geoff geoff is offline
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Default Pultec EQP clone problem

On 2/03/2021 8:50 am, wrote:
Don Pearce wrote:
================

I would be curious to see the oredrs of harmonics and if they altered
over freq.

geoff


I've taken an FFT showing all the harmonics up to and beyond the
ringing frequency. The harmonic at the ringing frequency is marked.


** Where ??


http://www.soundthoughts.co.uk/look/ringing.gif

The ring itself is of very short duration so despite its amplitude, it
contains very little energy compared to the harmonics which are
continuous. That is why it won't show up in the frequency domain


** Then you need to make make a *better* test.
Cos that one ****ing SUCKS.
FYI:

I used one of these:

https://uk.farnell.com/oep-oxford-el...ohm/dp/1172343

It rings at 34kHz, exactly as in the link from Scott Dorsey.

http://www.panix.com/~kludge/xformers/DSC00258.JPG

Stop being petulant child.



..... Phil



And that 34kHz ring is the same freq if excited by the leading edge of a
2kHz square wave, or by a 1kHz or a 5kHz square wave ? The harmonics of
those square wave frequencies being another thing and unrelated ...

geoff