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loss of range by hiding antenna?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=92992
Printed Date: May 14, 2025 at 7:22 AM


Topic: loss of range by hiding antenna?

Posted By: icarus_icarus
Subject: loss of range by hiding antenna?
Date Posted: April 16, 2007 at 2:30 AM

I wanted to hide the antenna totally on my Compustar 2W900FSAS (CM3000-V.3) in my Lincoln under the thin plastic panel on top of the dash (it will sit about 1/2" below this panel, lots of room there to hide it!) I really hate the looks of the CompuStar antenna so want to hide it if possible...

I figured not to put it in the headliner as it will be against the metal roof then which wouldn't be good, same with the A-pillar, but under this dash panel it will basically be sitting on my dash, but covered only by the thin plastic panel that sits on top and still higher than any metal on the car (well not the roof obviously ;) )...

Think I'll lose a lot or any of the reception from doing this?

Thanks.



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Replies:

Posted By: mobilecustoms
Date Posted: April 16, 2007 at 5:55 AM
yes you will lose a lot of rnge. it needs to be on the windshield

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Posted By: pitoaudiovisual
Date Posted: April 16, 2007 at 2:14 PM
i have done it before and didnt notice that much of a difference.

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Confidence is the key to any project!!




Posted By: dswift
Date Posted: April 16, 2007 at 4:54 PM
you'll lose at least 1000feet

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"dont ground out!"




Posted By: jose23
Date Posted: April 17, 2007 at 4:39 PM

Why not perform a simple test. Mount it on the windshield and walk down the street. Take note of how far you get before the alarm stops responding. Repeat the process with the antenna hidden. That way -if you do decide to hide it- you won't be wondering how much of your range is being lost. 

-Jose





Posted By: mobilecustoms
Date Posted: April 17, 2007 at 4:53 PM
i did it with an hx antenna on a dei valet system in an 07 crv and the range stunk when it was hidden. put it on the windshield centered with antenna cable streched out and works great.

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Posted By: pitoaudiovisual
Date Posted: April 17, 2007 at 7:51 PM
i have done it before in two cars and didnt have a noticable difference..

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Confidence is the key to any project!!




Posted By: icarus_icarus
Date Posted: April 18, 2007 at 5:36 AM
jose23 wrote:

Why not perform a simple test. Mount it on the windshield and walk down the street. Take note of how far you get before the alarm stops responding. Repeat the process with the antenna hidden. That way -if you do decide to hide it- you won't be wondering how much of your range is being lost. 

-Jose


This sounds like the best way to test it of course, but I also wanted others opinions when they did this if they lost reception from doing it... Looks like its a mixed bag though and actually testing it out is the way to go posted_image

Thank you everyone for the input, and please keep it coming as I still want to hear even if I know it's going to be some people do and some don't lose reception posted_image



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Posted By: tonyberg
Date Posted: April 18, 2007 at 10:43 AM
If its underneath just a dash pad then you wont lose much noticeable range, if you place it under neath the dash though under layers of metal, wires and modules you will lose alot.  The greatest reducer of range in an RF system is interference not material.




Posted By: icarus_icarus
Date Posted: April 19, 2007 at 2:31 AM

Yah, I was looking putting it under the top pad (actually its not even a pad on this car, just a thin sheet of plastic ~3/32" !)...



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Posted By: dswift
Date Posted: April 19, 2007 at 7:02 PM
shoot, i got mine folded on my visor. heh i still got dope range. haha Compustar what what. haha

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"dont ground out!"




Posted By: peterubers
Date Posted: April 22, 2007 at 1:54 PM
Radiofrequency energy is a very bizarre things... i am always amazed at how in various locations, the remote start range can be as bad as within a few feet of the glass where the antenna is mounted... whereas, in a non-RF interference area ---> 1200 feet... easy.   I just don't get it. 

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The search function is your friend.





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