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Author Topic: Hey whats the separator thing in the middle of the CB antenna?  (Read 1723 times)
HotRod
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*****
Posts: 909


2001 I/S First one was a 1999 I/S

Henderson, NV


« on: September 22, 2009, 10:02:08 AM »

Is that a resister or booster or what?
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DFragn
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« Reply #1 on: September 22, 2009, 10:23:35 AM »

I know little.
But, that's the coil wrap that effectively increases your antennae length for performance.
Someone else l'll bet will have the spec's for you.
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HotRod
Member
*****
Posts: 909


2001 I/S First one was a 1999 I/S

Henderson, NV


« Reply #2 on: September 22, 2009, 10:50:39 AM »

I know little.
But, that's the coil wrap that effectively increases your antennae length for performance.
Someone else l'll bet will have the spec's for you.
That makes sense,since the fire sticks have a wrap all the way from bottom to top and our is a metal rod has to have the wrap somewhere I guess,thanks. I hear the fire sticks work better,I think I'm going to change over,not getting out very well. I used to be a trucker and still like to chat once in a while when I'm on the road.
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Bagger John - #3785
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Posts: 1952



« Reply #3 on: September 22, 2009, 03:16:35 PM »

It's a center-loading coil.

More efficient than a base-loaded or helically-wound design.
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HotRod
Member
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Posts: 909


2001 I/S First one was a 1999 I/S

Henderson, NV


« Reply #4 on: September 22, 2009, 04:06:12 PM »

It's a center-loading coil.

More efficient than a base-loaded or helically-wound design.
So is the stock antenna the one to stay with or is there a better one?
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LadyDraco
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Posts: 1861


TISE

Bastian, VA. Some of the best roads in the East


« Reply #5 on: September 22, 2009, 06:32:31 PM »

IMHO... The OEM antennas are the best...
Very Durable.... The wrapped ones will break down with many miles of riding ....
I have had many others ... And nothing gets out like the OEM'S cooldude...
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Life is what you make of it~If it don't fit make alterations...
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sugerbear
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Posts: 2419


wentzville mo


« Reply #6 on: September 23, 2009, 08:44:55 AM »

the signal emanates from the coil goes over the top of the antenna and outward. a "stick" antenna emanates from the bottom of the antenna and out over the top. with the center load the signal will travel farther than the "stick" will.
the SWR of the antenna is how close the signal passes to the top of the antenna, too high or too low gives a standing wave over acceptable limits sending the signal back into the antenna. your body affects  the SRW, getting the coil higher gives a cleaner path for the signal.
center coils are much better.
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Bagger John - #3785
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Posts: 1952



« Reply #7 on: September 23, 2009, 04:45:55 PM »

the signal emanates from the coil goes over the top of the antenna and outward. a "stick" antenna emanates from the bottom of the antenna and out over the top. with the center load the signal will travel farther than the "stick" will.
the SWR of the antenna is how close the signal passes to the top of the antenna, too high or too low gives a standing wave over acceptable limits sending the signal back into the antenna. your body affects  the SRW, getting the coil higher gives a cleaner path for the signal.
center coils are much better.
This is simply not true.

First, regarding the loading coil:

The entire antenna radiates, not just the coil itself. The purpose of the coil is to make the antenna electrically longer while allowing it to remain physically short.

The purpose of placing the coil at the antenna's midpoint has to do with the amount of distributed capacitance along the length of the physical radiator. In short: The higher up (to a point...), the less capacitive reactance must be cancelled out...and the broader the antenna's 2:1 SWR bandwidth will be.

Next, SWR:

Standing-wave ratio is a measurement of how much energy is reflected back to the transmitter (source) as the result of an impedance mismatch at the antenna (load). Standing waves do not "come off the top of the antenna". They are, however, present on the transmission line (coax) in the event of a mismatch.

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