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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: When is an inductor not an inductor? When it is a capacitor... posted by Rabelais on May 29, 2007 at 22:07:49:
or core magnetic behavior (or both). I suspect core magnetic behavior in the Hammond chokes, as transformers of similar size have much better frequency response.
All real capacitors and inductors are limited in frequency response by their parasitic inductance and capacitance, respectively. Getting an inductor that is useful at the noise frequencies that affect audio component performance is not trivial. Even so-called "RF" chokes with ferrite cores tend to have low self-resonance frequencies. I've found it necessary to make composite inductors, with several units in series, each one with smaller inductance and higher self-resonance frequency, to get broad-band coverage.
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Follow Ups
- Agree. Not clear whether impedance peak reflects self-resonance - Al Sekela 09:45:40 05/30/07 (0)
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