Now I understand the loading coils on a bugcatcher are not resonnant,
they're just loading coils.



They ARE resonant, otherwise what's the point in using one?

A short antenna exhibits a principally capacitive reactance that with
the addition of a loading coil resonates the structure leaving only
the radiation resistance behind.

73's
Richard Clark, KB7QHC



They are NOT resonant at the frequencies of interest - making antenna resonate
on that frequency. If they were, they would act as a trap and "disconnect" rest
of the whip beyond the coil. And that's the truth, fact, reality. Uh, huh?

Yuri, K3BU.us

On 07 Feb 2004 18:43:31 GMT, oUsama (Yuri Blanarovich)
wrote:

They are NOT resonant at the frequencies of interest
That is like saying the coil in a tank is not resonant by looking at
the coil alone.

What a myopic way of looking at antenna design.

Loading coils are SERIES RESONANT, traps are PARALLEL RESONANT.

The only difference is where the capacitor is. For a loading coil,
the capacitor is made up of the reactance of a too short antenna. For
a trap, there is a literal capacitor, AND the reactance of the
antenna.

If the antenna had no reactance, there would be no need for the
loading coil (unless it is your next patent-applied for snow removal
device).

73's
Richard Clark, KB7QHC

On 07 Feb 2004 18:43:31 GMT, oUsama (Yuri Blanarovich)
wrote:

They are NOT resonant at the frequencies of interest
That is like saying the coil in a tank is not resonant by looking at
the coil alone.


Coil in a tank (with Cap) is not resonant on the same frequencu as "naked"
coil. Big difference where it resonates.

What a myopic way of looking at antenna design.


My what?

Loading coils are SERIES RESONANT, traps are PARALLEL RESONANT.

Uh, huh! Bulsheet! If the COIL is self resonant (on frequency of interest), it
becomes trap.


The only difference is where the capacitor is. For a loading coil,
the capacitor is made up of the reactance of a too short antenna. For
a trap, there is a literal capacitor, AND the reactance of the
antenna.


And there is huge difference how the coil works in a circuit!!!! It could be a
loading coil, or it could be a trap. That's why there are different names for
it.

If the antenna had no reactance, there would be no need for the
loading coil (unless it is your next patent-applied for snow removal
device).

More W8JI rhetoric? Maybe time to grow up?


73's
Richard Clark, KB7QHC


Using your jabs Richard, I would say that you are off the wall, rocker, tree,
you name it. You are displaying lack of proficiency, understanding, basics,
etc.

He was talking about the COIL. Coil without "capacitor" made of antenna or rest
of the radiator.
LOADING COIL is a COIL - that's it. Coil will resonate rest of the antenna with
its whatever reactance. But coil by itself will resonate somewhere else,
depending on its internal capacitance. But definitely not on the resonant
frequency of the ANTENNA. If it did then it would be a TRAP. And that is the
difference, and that was what was asked.

Loading COIL is not reasonant on the frequency (of interest) that we want
antenna to be resonant on (unless using it as helical antenna), otherwise it
would act as a TRAP and insulate the remaining portion of the radiator and make
the portion of radiator up to the trap (coil) resonant on frequency
corresponding to its (electrical) quarter wave length.

If you can not comprehend the difference between the LOADING COIL and TRAP than
rest of the discussions here are pointless and you should go back and re-read
some books (how do you like that? :-)

Yuri, K3BU.us
Warning! I bite back!

On 07 Feb 2004 21:15:57 GMT, oUsama (Yuri Blanarovich)
wrote:
That is like saying the coil in a tank is not resonant by looking at
the coil alone.

Coil in a tank (with Cap) is not resonant on the same frequencu as "naked"
coil.
Uh-huh And if the Pope were Presbyterian he wouldn't be Agnostic....

Uh-huh And if the Pope were Presbyterian he wouldn't be Agnostic....







Uh-Huh, and you are full of it and displaying conversion to W8JI ridiculing
cult followers, good luck and enjoy it. Joining the freaktal team?

73 la - la

On 07 Feb 2004 22:05:42 GMT, oUsama (Yuri Blanarovich)
wrote:
Joining the freaktal team?
Do you guys still hang out in robes at airports?

C'mon guys! Self resonance is significantly different from circuit
resonance!!

DD

Richard Clark wrote:

On 07 Feb 2004 21:15:57 GMT, oUsama (Yuri Blanarovich)
wrote:

That is like saying the coil in a tank is not resonant by looking at
the coil alone.


Coil in a tank (with Cap) is not resonant on the same frequencu as "naked"
coil.

Uh-huh And if the Pope were Presbyterian he wouldn't be Agnostic....

Yuri Blanarovich wrote:
Using your jabs Richard, I would say that you are off the wall, rocker, tree,
you name it. You are displaying lack of proficiency, understanding, basics,
etc.

Not only that, Yuri, but he is desperately trying to change the subject away
from the original. Have you noticed? That logical diversion, diverting the issue,
is much older than Richard and won't work against people who recognize it.
--
73, Cecil http://www.qsl.net/w5dxp



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Not only that, Yuri, but he is desperately trying to change the subject away
from the original. Have you noticed? That logical diversion, diverting the
issue,
is much older than Richard and won't work against people who recognize it.
--
73, Cecil http://www.qsl.net/w5dxp


Yep, it's getting pathetic, looks like graduates from W8JI "university". Time
to move on to some serious work with those who see the light. I want to explore
inductopacitive loads. WX is warming up, the white sh1t is melting, I will get
out soon, and do some more 'sperimenting.
We are trying to have mobile ant shootout here in the spring.

Yuri, K3BU.us

Richard Clark wrote:
Loading coils are SERIES RESONANT, traps are PARALLEL RESONANT.

BS, Richard. If they were series resonant how could they possibly
supply any inductive reactance which is what is needed to neutralize
the capacitive reactance of the short antenna? A "SERIES RESONANT
loading coil" is purely resistive, by definition.
--
73, Cecil http://www.qsl.net/w5dxp



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