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The cores are
manufactured to the AL values listed;
the permeability for each material is for reference
only. In all cases, the AL values are
based on a peak AC flux density of 10 guass (1mT)
at a frequency of 10kHz. Measurements made under
other conditions will produce results in accordance
with the magnetic curves shown in the Percent Initial Permeability vs. Peak AC Flux Density Graph.
The toroidal cores
are tested with an evenly-spaced full single-layer
winding in order to minimize leakage effects. Iron
powder cores tested with a small number of turns
which are not evenly distributed will produce
higher inductance readings than expected. The E
cores are tested with 100 turns.
The Magnetic
Characteristic curves shown are have a typical
tolerance of ±10%. The curves on Core Loss
characteristics have a typical tolerance of
±15%.
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