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Dear Colleagues;
Does anyone know of a simple way to directly measure the
self-inductance
of a coax cable? Our campus is switching over to twisted pair for
local
computer networks, producing some long lengths of surplus thin
Ethernet
coax. With modern, fast scopes some neat experiments should be
possible.
In one, we measure the impedance by terminating the coax with a
variable
resistor and by adjusting the resistance until the reflected wave
disappears. The capacitance can be determined by using the cable as
the
capacitor in a simple RC circuit. Now, if we can only measure the
inductance independently the inductance can be measured and compared
with
the measured value.
Tim Usher