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Garmin XM Weather Antenna

Old 07-16-2008, 07:03 PM
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Default Garmin XM Weather Antenna

Well, I just completed the installation of an Atlantic Towers arch and a Garmin 18hd radar set. I'm very happy with this setup, just have to fine tune the wedge on the dome.

I'd like to add the XM weather option, but need to get the antenna up above the dome on my arch. I can't seem to find any info on the antenna for the XM. Does this thing look just like my GPS antenna? And more importantly, does it have the same threads as a VHF/GPS antenna such that I can get a mast on order as well?

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Old 07-16-2008, 07:08 PM
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Default Re: Garmin XM Weather Antenna

Yes it does look just like your gps antenna. Same thread mount, etc.
Good luck,
Ryan
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Old 07-16-2008, 09:37 PM
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Default Re: Garmin XM Weather Antenna

as ryan said, it is the same size/shape/mount as the gps antenna. the difference is that it has a bnc connector on the end of the cable. this is a passive antenna so the signal levels are much much much lower than from the gps antenna. that makes the connector & cable a lot more important, so as a general rule...no cutting the connector off the end (although it can be done & replaced if done correctly). the connector is big, so drill holes for it is not fun (i hate big holes in my boat).
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Old 07-17-2008, 02:15 AM
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Default Re: Garmin XM Weather Antenna

I cut it, re crimped a nice new BNC connector on it. Works perfect, but as mentioned you do need to be careful with it. It's easy to make a "bad" bnc connection. WHY they used BNC is beyond me!! Just stipid. These manufacturers should go out and do some of there onw installs, then go back and make NEW, SMALL connectors!!! Garmin with the eathernet connector requires somethiong like a 1.5" whole. They are kidding right?

Yooper, you can put the XM antenna below the dome, as long as it is not blocked shadowed by the dome.
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Old 07-17-2008, 04:19 AM
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Default RE: Garmin XM Weather Antenna

Thanks guys.

Bird--gotcha on the install location. I'll put it on a small mast on top of the arch; that's the best place from an aesthetic perspective--it will be parallel to and match my gps antenna. I absolutely won't be drilling 1.5" holes--that's crazy. Not to mention that it would compromise the integrity of the 2" pipe arch.

When I ran the communication cable for the radar, I cut and spliced that using "Scotch Lok" button connectors that a friend that does telephone line repair gave me. Not the neatest or prettiest splice, but it works. I don't know where to get my hands on the 8 pin crimping tool for the "ethernet" plug, so I left a tail on it when I cut it off and spliced it back together using the buttons.

The BNC connector that you reference is the same type of plug ("Ethernet") that the radome uses?
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Old 07-17-2008, 04:25 AM
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Default RE: Garmin XM Weather Antenna

I should have Googled BNC before posting...

I see that it is a coax. cable end. Looks like I'll try my luck with that splice...
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Old 07-17-2008, 06:52 AM
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Default Re: Garmin XM Weather Antenna

Yooper,
Yes, it's a thin type of coax (rg59). I would not recomment "splicing" the coax back together. Cut it a few inches from the connector, and put a new connector on. If you can't, get somebody to come down and do it for you (cable tv guy, marine electronics guy, most network cabling guys also have BNC stuff).
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Old 07-17-2008, 07:04 AM
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Default Re: Garmin XM Weather Antenna

You guys are right about the connectors. The XM antenna requires a 3/4 in hole!! Still trying to figure out how to run the connector through the piping without it looking like crap......Mark
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Old 07-17-2008, 01:57 PM
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Default Re: Garmin XM Weather Antenna

Hey Offshore, I have an XM radio on my small center console and have the XM antenna mounted inside the console and it works fine. I don't have a Garmin "x-type" unit with the XM Weather feature so I don't have the antenna you are working with but I would recommend testing it in a location that would simplify mounting.
Just a thought before you drill any more holes.
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Old 07-17-2008, 02:57 PM
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Default RE: Garmin XM Weather Antenna

This bit of info may or may not help, but I am using a cheap XM antenna that I got for my skyfi for my GDL30a, which gives me both weather and radio.
The connections are very small, and you can make up a conversion wire just before the GDL30a.
This is, if you can get a hold of a cheap xm antenna, otherwise 3/4" drill away..
Ricky
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Old 07-17-2008, 03:04 PM
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Default RE: Garmin XM Weather Antenna

This antenna is not connectvngto a GDL30A unit .... it's the self contained smart antenna GXM 31 with usb connectivity. Do not cut this wire.



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Old 07-18-2008, 03:54 AM
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Default Re: Garmin XM Weather Antenna

The crimp tool and connectors are available at Home Depot. Purchase extra connectors and practice a few times before making the final connections on the boat. Pay close attention to wiring color sequence on each end of the cable. They are not the same on both ends. Pretty easy to get the wires in the wrong pin slot.
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Old 07-22-2008, 06:30 AM
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Default Re: Garmin XM Weather Antenna

The Garmin gdl 30a is the way to go comes with antenna xm radio and weather
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Old 07-22-2008, 06:32 AM
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Default Re: Garmin XM Weather Antenna

There is a guy on ebay selling them for 309.99 thats a unreal price if anyone interested thats by far the cheapest i have seen them and he has sold a ton of them all with good feedback
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Old 07-22-2008, 07:35 AM
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Default Re: Garmin XM Weather Antenna

Yooper,

I am willing to bet almost anything that you will have troubles with that splice on your radar. I have tried several different splicing methods and they have all failed within a few months of installation.

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