"I came upon the skeleton of an old mil-surplus
power supply that contained several non-inductive resistors.
There were 4 33,000 ohm and two 800 ohm units, all unmarked as to wattage, but
at least (guessing) 100 watts.
They were all marked as to resistance, and all marked "non-inductive".
All are designed to fit into a largish fuse holder.
Just idle curiousity, but why would a power supply contain non-inductive
resistors?"
They are actually quite inductive. Some of the early power resistors used to
be quite inductive at 60 Hz. That was in the 30's. So, when a new crop came
out, they got marked NI or said non-inductive. They are non-inductive only for
low frequencies - not real radio frequencies.
Colin K7FM
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