Why have I got 2 vhf aerials ???????????

Jobs_a_ good_ un

Jobs_a_ good_ un

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www.beneteau393.co.uk
Just replaced one of the vhf aerials that got snapped when the boat was moved I spliced the wires and used black tape to fix together seems to work ok but someone said I should get the correct conector to join 2 vhf leads anyone know which type etc
Also why are there 2 vhf aerials on my boat are they both for vhfIve got a simrad stubby antena for my chart plotter
And a seperate one for the navtex any body know
There hugh tall things on rachets above the boat
IMG_0428.jpg
 
I don't know why you have two aerials; maybe you had two vhf radios at some time, one on the bridge and one below, but if you go to a DSC set you'll need two anyway. You can join coax cable by using a pl259 on each half of the cable and join them via an SO239 double female socket.
 
Excuse my ignorance, but why do you need two VHF aerials for a DSC radio?

I am about to fit a new DSC radio and instructtions say I only need the one.
 
[ QUOTE ]
Excuse my ignorance, but why do you need two VHF aerials for a DSC radio?

I am about to fit a new DSC radio and instructtions say I only need the one.

[/ QUOTE ]

Not ignorance at all. You do only need the one. If you had a separate DSC controller then it may have been the case. With the integrated sets you just screw in your existing Ariel plug into the back of the new set.
 
Twin VHF arials almost always indicate the boat has or had a duplex VHF at some point. Duplex was the in thing befor DSC and meant that you could have a two way conversation with another duplex set i.e you could both talk at the same time like a phone. Basicly you transmit on one channel and receive on another.

I always understood that the VHF ariels needed to be more than 10 feet apart to work properly - I dont know how wide Sami is?
 
certainly the duplex sets I have seen have atelephone type handset. You will still have to press a button, other wise you would be transmitting permenantly. Channel 80 is a duplex channel, next time you call a marina try transmitting when the marina bloke is talking to you. If you can still hear him, you have duplex system.

Also, and perhaps a bit simpler, your VHS display may have a little logo saying 'dup' to indicate duplex.
 
My guess is that it has buggerall to do with duplex or any other kind of VHF and the other aerial will be used as an antenna for the stereo
 
Both my previous Broom 38 and my new 42 have 2 aerials - 1 for the main VHF second for the DSC channel 70.

Both fitted by MEI in Port Solent who are well respected in the industry. Apparently it's the best way of doing it as you continue to monitor 70 when using other channels.
 
Usually easy to tell, If one is VHF and one is Stereo then there is probably a small sticker near the base and they will have a different code.
 
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