Notices
Marine Electronics Forum

Internal antenna GPS?

Old 07-18-2006, 03:22 PM
  #1  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Jul 2006
Posts: 3,687
Default Internal antenna GPS?

Will a GPS unit with internal antenna get a decent enough signal to work in a fiberglass radio box of a T-top?
Just wondering before I buy a new unit for the new boat. I can get one with an external antenna if necessary.
I assume that even it I get a signal from an internal antenna unit, I will get a much better signal from an external antenna.

Suggestions on a reasonably prices GPS unit?

Thanks in advance.

CAP
CAP1 is offline  
Old 07-18-2006, 03:46 PM
  #2  
Senior MemberCaptains Club Member
 
Join Date: Oct 2003
Posts: 53,965
Default Re: Internal antenna GPS?

No
A Few Dollars is offline  
Old 07-18-2006, 03:48 PM
  #3  
Member
 
Join Date: Jul 2005
Location:
Posts: 55
Default Re: Internal antenna GPS?

I was just going to post the same question. My boat has a bimini top, does anyone know about the reception of the internal antenna units versus external? Is it worth the extra trouble of having an external antenna?

My opinion was with the internal unit, I could just pop the unit onto my trucks dash board and use it for any long distance road trips as well with an extra power cord. With the external antenna this would be much tougher to do.

As far as cheap units, I found one that seems pretty good for the money.

Here is the link:
http://www.eangler.com/product/319393385.htm

Here is the companies site to see all their models:
http://www.eaglegps.com/Products

Does anyone have and opinions or experience with EAGLE Fish Elite units? I am looking at the FishElite 642c iGPS Color Combo GPS Chartplotter/Fish Finder with Internal Antenna. It is a GPS/Fishfinder with decent resolution, WAAS accuracy and a color screen for about $550.


Any idea of the quality, reliability or usabilty of these units, aside from the "you get what you pay for" comments from the millionaire crowd? Sorry, but I cant justify putting a $1500 GPS on a $5000 boat that only gets used on the inter-coastal 99% of the time.

Thanks for any info.
madgreekvw is offline  
Old 07-18-2006, 03:48 PM
  #4  
Senior Member
 
Join Date: May 2006
Location: Allentown, PA
Posts: 309
Default Re: Internal antenna GPS?

Most manufacturers suggest against putting internal antenna units under a hard top or in a box.

As for an internal under a soft bimini, it'll work just fine. I run a Lowrance LMS-334Ci (same unit as the FishElite 642Ci) under my bimini and the full enclosure since I got it and haven't have a problem with the GPS losing position.
erikrs301 is offline  
Old 07-18-2006, 03:58 PM
  #5  
Member
 
Join Date: Jul 2005
Location:
Posts: 55
Default Re: Internal antenna GPS?

snoczp

By the way, Eagle also makes the same unit I posted the link for with an external antenna for the same price.
http://www.eangler.com/product/319393385.htm

Aside from the antenna issue, anyone have any experience with this companies products?
madgreekvw is offline  
Old 07-18-2006, 04:00 PM
  #6  
Senior Member
 
Join Date: Mar 2005
Location: Marietta, Georgia
Posts: 556
Default RE: Internal antenna GPS?

snoczp - 7/18/2006 2:22 PM

Will a GPS unit with internal antenna get a decent enough signal to work in a fiberglass radio box of a T-top?
It will probably work. How well it works depends on several factors such as the thickness of the box and the location of the antenna relative to other interference, esp. anything metal. I have my GPS under a bimini top close to the windshield rail on the center console, and it works fine.
crparmelee is offline  
Old 07-18-2006, 09:26 PM
  #7  
Senior MemberCaptains Club Member
 
Join Date: Mar 2002
Location: FL
Posts: 19,079
Default Re: Internal antenna GPS?

A Few Dollars - No
Bullsugar - ye know not what ye talk about. I have installed (or instructed/helped install) dozens of GPS's with either an internal antenna, or an external antenna mounted INSIDE of a fiberglass electronics box that is mounted under a t-top, and they all work PERFECTLY.
First Light is offline  
Old 07-20-2006, 01:34 PM
  #8  
Member
 
Join Date: Jul 2005
Location:
Posts: 55
Default Re: Internal antenna GPS?

Just as a side note, I went for it and ordered the Eagle Seacharter 642 Sonar/GPS with the internal antenna from BOE. Not only did they have they best price and free shipping. I ordered it at about 3 pm Wednesday, I got it by Noon on Thursday! I have read many posts from people swearing at the great prices and service from BOE, but I am still amazed at how great they are to deal with.

Here is the unit i got, seems like a great unit for the price, about $570. I'll let you all know how it performs.

Also, is EAGLE and offshoot of Lowrance or vice-versa?
madgreekvw is offline  
Old 07-20-2006, 05:48 PM
  #9  
Senior MemberCaptains Club Member
 
Join Date: Nov 2002
Location: Pensacola, Fl
Posts: 11,460
Default Re: Internal antenna GPS?

Should work fine--there may be a slight amount of attenutation of the signal from the fiberglass box, but not enough to affect accuracy. I run a number of satellite antennas in a fiberglass van, and have found some GPS antennas which even work on in a pilot house under a flying bridge (Assume that there is little if any wood in the dock core). I have never had a problem under a cloth Bimini--sure there may be occasionally a dropped satellite when it is behind a metal bow, but this is very transcient and there are always plenty of other satellites above the horizon.
thataway is offline  
Old 07-21-2006, 10:26 AM
  #10  
Senior Member
 
Join Date: May 2006
Location: Allentown, PA
Posts: 309
Default Re: Internal antenna GPS?

madgreekvw - 7/20/2006 12:34 PM

Also, is EAGLE and offshoot of Lowrance or vice-versa?
yup, it's all the same. That's not a bad price, my 334 was $599 from Cabelas...but I had a couple hundred in gift cards and Club points to use up so it was only $250 out of pocket.
erikrs301 is offline  
Old 07-21-2006, 09:04 PM
  #11  
Senior Member
 
Join Date: Feb 2001
Location: Australia
Posts: 3,577
Default Re: Internal antenna GPS?

....I assume that even it I get a signal from an internal antenna unit, I will get a much better signal from an external antenna.
Better would be a more appropriate term than "much better" but the more important thing is the integrity of an external antenna will always have the edge, always.

Cheers, Kerry.

Kerry is offline  
Old 07-24-2006, 03:14 PM
  #12  
Senior MemberCaptains Club Member
 
Join Date: Aug 2003
Location: Out west
Posts: 3,298
Default RE: Internal antenna GPS?

I have a Garmin 182c with internal antennae that works just fine on my dash. It sits under a fiberglass hard T-Top and is surrounded on three sides by my vinyl enclosure. Beside it sits my Garmin 72 handheld I use as a backup. The 72 also receives messages from the satellites just fine. (I hook the 72 to my Humminbird Matrix 37 and this makes for an excellent backup gps with a large screen and also serves as my sounder)

I haven't tried my Garmin products in the glass box underneath my T-Top and suspect this would not work well with my internal antenna units. I suspect if I were to mount my chartplotter/gps units in the t-top box I'd wish to use an external antenna.

Garmin 182c is no longer produced. You can find them new via ebay and they are around $500 now, but remember you have to purchase another $150 chip for map details for your boating region. I'd look for a newer product for tha reason. Otherwise, the 182c is an excellent unit and I would only want a more "modern" unit for screen size. It has way more features than I'll ever use and gets me home from offshore every time.

dssmith is offline  
Old 07-24-2006, 04:00 PM
  #13  
Member
 
Join Date: May 2005
Location: cyprus
Posts: 70
Default Re: Internal antenna GPS?

hi
i have a navman color GPS/tracker for 4 year now with internal antenna and its under a hard top
i have not yet met any problems of any kind
powers up with in 15 seconds
bye
sface1234 is offline  
Old 07-29-2006, 03:56 AM
  #14  
Member
 
Join Date: Feb 2006
Location:
Posts: 69
Default Re: Internal antenna GPS?

All external GPS antennas are totaly sealed in the fiberglass or plastic allready................
Barba is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread