At 7:33 PM +0200 9/25/02, Maurizio Panicara wrote:
> > I must disagree. It is essential! The trap is a parallel-resonant,
>> nearly lumped, LC circuit. The C stems mainly from the capacitance
>> between the center conductor and the shield/braid of the coax.
>
>I do not understand your answer.
>Do You mean that a parallel resonant circuit used as a trap is not
>reversible ?
>Why ?
The original question was: "I noticed in the ARRL antenna hand book
that the braid is the input and the center conductor is the output.
Is this important, and why?"
I take "input" and "output" to refer to the two terminals of the
trap. The answer to the question must be yes. If both terminal
connections were made to the center-conductor, or if both terminal
connections were made to the braid/shield, then the trap would not
work.
Of the two terminals of the trap, one must be on the center conductor
and the other must be on the braid/shield.
-Chuck, W1HIS
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