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Dale Ensing
Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC
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 Posted: Wed Jan 09, 2008 3:08 pm Post subject: XM radio power cord |
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A question regarding an XM Express radio that I use in the airplane and in
the car.
The power cord for the XM radio has a cigarette lighter type plug, is about
three feet long with a mini coaxial plug on the radio end. Clamped on the
cord are two cylinder shaped plastic devices (for lack of a better
descriptive word). There is one on the cig. liter plug end and another
smaller one on the radio end.
The wire used in the power cord is very stiff and difficult to keep
organized and out of the way. I would like to substitute another power cord
that is coiled and stretchy. Much easier to manage and keep neat.
What are the devices clamped on the cord and what is their function? What
will be the impact if I used a power cord without the devices.
Dale Ensing
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_________________
Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
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nuckolls.bob(at)cox.net
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| Posted: Thu Jan 10, 2008 5:18 pm Post subject: XM radio power cord |
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At 06:06 PM 1/9/2008 -0500, you wrote:
| Quote: |
<densing(at)carolina.rr.com>
A question regarding an XM Express radio that I use in the airplane and in
the car.
The power cord for the XM radio has a cigarette lighter type plug, is
about three feet long with a mini coaxial plug on the radio end. Clamped
on the cord are two cylinder shaped plastic devices (for lack of a better
descriptive word). There is one on the cig. liter plug end and another
smaller one on the radio end.
The wire used in the power cord is very stiff and difficult to keep
organized and out of the way. I would like to substitute another power
cord that is coiled and stretchy. Much easier to manage and keep neat.
What are the devices clamped on the cord and what is their function? What
will be the impact if I used a power cord without the devices.
|
I suspect these are ferrite noise filters which
are commonly added to commercial products for the
for the purpose of reducing conducted electro-magnetic
interference between devices connected with the cable.
See:
http://www.aeroelectric.com/Pictures/Filters/Ferrite_EMI_Filter_2.jpg
http://www.aeroelectric.com/Pictures/Filters/Ferrite_EMI_Filter.jpg
If the devices you're seeing are similar in nature, then
it's probable that your device will FUNCTION if fitted
with a cord that does not have the filters.
But like any non-qualified device use in the airplane,
you should be cognizant of potential for interference
from the XM radio . . . whether filtered or not. Do some
tests and be ready to turn the radio OFF anytime another
radio system seems not to behave as expected.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
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Dale Ensing
Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC
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| Posted: Thu Jan 10, 2008 6:36 pm Post subject: XM radio power cord |
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Thank you Bob. The 'devices' on the power cord look just like the ferrite
filters in the pictures. And thanks for the alert to possible interference
to other radio systems in the airplane.
Dale
| Quote: | At 06:06 PM 1/9/2008 -0500, you wrote:
>
><densing(at)carolina.rr.com>
>
>A question regarding an XM Express radio that I use in the airplane and in
>the car.
>
>The power cord for the XM radio has a cigarette lighter type plug, is
>about three feet long with a mini coaxial plug on the radio end. Clamped
>on the cord are two cylinder shaped plastic devices (for lack of a better
>descriptive word). There is one on the cig. liter plug end and another
>smaller one on the radio end.
>The wire used in the power cord is very stiff and difficult to keep
>organized and out of the way. I would like to substitute another power
>cord that is coiled and stretchy. Much easier to manage and keep neat.
>What are the devices clamped on the cord and what is their function? What
>will be the impact if I used a power cord without the devices.
I suspect these are ferrite noise filters which
are commonly added to commercial products for the
for the purpose of reducing conducted electro-magnetic
interference between devices connected with the cable.
See:
http://www.aeroelectric.com/Pictures/Filters/Ferrite_EMI_Filter_2.jpg
http://www.aeroelectric.com/Pictures/Filters/Ferrite_EMI_Filter.jpg
If the devices you're seeing are similar in nature, then
it's probable that your device will FUNCTION if fitted
with a cord that does not have the filters.
But like any non-qualified device use in the airplane,
you should be cognizant of potential for interference
from the XM radio . . . whether filtered or not. Do some
tests and be ready to turn the radio OFF anytime another
radio system seems not to behave as expected.
Bob . . .
|
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_________________
Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
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