Marine Electronics Forum

VHF antenna issue

Old 07-30-2013, 04:09 PM
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Default VHF antenna issue

Attached, is a picture of my current VHF antenna coupler, along with the top and bottom of the console. I'm trying to find out a better mounting option as the builder had the antenna base, without the black bracket in the picture, with silicone in the hole of the console. Basically, the antenna was floating in silicone. The black bracket came with the antenna, which is a short Shakespeare VHF antenna that looks like a cellular antenna. Any mounting suggestions? Is there a longer coupler that may help get the base of the antenna up a few inches to the top of the console?

Thanks, in advance, for any suggestions
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Last edited by aah924; 07-30-2013 at 04:20 PM.
Old 07-31-2013, 01:53 PM
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Couple of things. You should have a standard marine VHF antenna mount. These come in all price ranges starting at about 10 bucks.

Antennas have to be right electrical length to be effective. In general they need to be a quarter wave, half wave, or 5/8ths wave. Changes in physical length can be made by adding a coil to attain the same electrical length in a smaller physical package. However, the coil comes at the price of efficiency. That's why you see all the 8 foot antennas on boats.

You need to check whether you have the right antenna, and if its the right antenna for your boating needs.

That terminal fitting looks a bit dodgey to me. I think I see what might the shield wire sticking out around the sides. Not a good thing.

If the antenna is right, get a mount for it and get a pass through fitting for the hole in the console.

I would cut off that cable fitting and replace it. Solder on a new one if you can. If not, use the crimp type that Shakespeare has been selling. They are not bad if you are careful.

If the antenna is not right two bad things can happen. Your transmission might not be heard and over time you can damage the final transistors in your radio's transmitter.

If you're not familiar with this stuff there is usually someone on your dock that is. Ask for help and buy him a six pack. Please do not rely on your cell phone.

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