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Old 07-03-2013, 11:35   #1
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Unknown Item

Can someone tell me what this is. We just bought this boat and it had a Garmin 120 on it. Doesn't work and i'm assuming this was part of it.
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Old 07-03-2013, 11:49   #2
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Re: Unknown Item

It rather looks like the antenna for your Garmin gps.

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Old 07-03-2013, 11:56   #3
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Re: Unknown Item

Yup, GPS antenna. Old one.
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Old 07-03-2013, 13:09   #4
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Re: Unknown Item

Well I thought it might be that also. Markings on it are worn off. The Garmin 120 was GPS capable wasn't it? I assume it was. Plus it doesn't work. nothing happens when you try to turn on. Wa supposed to be working. Boat has sat for probably 5 years. My Nav radio didn't work till UI played with the knobs enough to get them making contact. I wonder if Garmin is the same.
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Old 07-03-2013, 13:25   #5
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Re: Unknown Item

The external antenna usually gets power over the coax cable that it uses to talk to the head (display) unit. if the display unit powers up, check the cable for cuts or kinks or plain corrosion. If the cable is good, there's nothing left for you to easily check or fix. You can ask Garmin what a repair might cost but the odds are it is time to toss it and buy something newer.
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Old 07-03-2013, 13:36   #6
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Re: Unknown Item

It's a Garman GA-28 low-profile antenna. It was replaced by the GA-29, which has also been discontinued, now replaced by the GA-30.

In other words, you've got some old technology there.
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Old 07-03-2013, 15:39   #7
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Re: Unknown Item

So the 120 i have is old I know but would it be useful if it still worked. Apparently what I found out from the original owners is that it was in working condition the last time they used it. He got sick 4 years ago and passed away from cancer. They had never been back to the boat since he got sick. as I said in previous post the Nav radio didn't do nothing until I played around with connectors and knobs. finally it started working. I'm assuming corrosion built up on contacts. that's what I'm thinking about the 120 I have. I know it's well beyond getting fixed from Garmin so I thought I'm take it apart and play around. Get things loosened up. The on/ off switch is a touch sensitive which i can have a look at. Maybe a good clean. I'm very capable on doing this by the way.
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Old 07-03-2013, 15:44   #8
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Re: Unknown Item

"The on/ off switch is a touch sensitive"
Are you sure about that? Usually this would be a membrane switch, a physical switch with a plastic "bubble" on top but still a physical switch inside. They rarely corrode and usually can't be cleaned. If it is a carbon-button contact, like many remote controls and phones use, sometimes you can use alcohol to clean the contacts, the keypad plastics leach out a non-conductive gunk as they age. But true touch-sensitive with no moving parts? There's nothing to fix if that's it. If the unit won't power up at all, there may also be an internal backup battery which has died and needs to be replaced.

More likely the coax is damaged, or rain got into the antenna and ruined it.
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