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Old February 3rd 11, 04:31 AM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: May 2010
Posts: 8
Default A small riddle, just for fun

In my first EE class, 'way back in the fall of 1962, the instructor
walked in and said "We shall study LLFPB", by which he meant

Lumped, Linear, Finite, Passive, and BILATERAL

so I'd have to conclude that your bipole is one or more of
not lumped and/or
not linear and/or
not finite and/or
not passive.

Yesterday, while repairing my antenna, something came to my mind I had never
focused on before.

Let us consider a bipole, that is a "black box" having TWO terminals and
including plain passive elements only (like capacitors, inductors, ... , no
diodes or other special devices), arranged the way you prefer, it does not
matter.

Instead of directly telling which it is, just for fun I wonder whether anyone
can figure out a case in which a bipole may not be reversed without
consequences. Not difficult, but it anyway requires some thinking.
--
-- Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
NRA Life Member & Certified Instructor for Rifle, Pistol, & Home Firearm Safety
Also Certified Instructor for the Kansas Concealed-Carry Handgun (CCH) license
 
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