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  #1  
Old 09-02-2008
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Marine radio override the stereo

Is there a way to get my marine radio to override my stereo system when a transmition occurs?

Thanks.
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Old 09-02-2008
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Override meaning run the audio into your speakers? or override meaning cut off the stereo noise? If you use an antenna splitter that runs your am/fm antenna using your vhf antenna, it will drop the fm signal when you transmit.
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Old 09-03-2008
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Usually, you'll need some sort of mixer box to isolate the two inputs and cut the feed from the stereo when the VHF triggers... if you just wire the VHF output and the Stereo output together, you'll probably end up frying the output amps.
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Old 09-03-2008
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You actually have quite a few options if you tap into the motorcycle industry for communications.

Behr - which I use on my bike auto switches between cell phone, cb, stereo and other devices - pricey however for what I wanted.

Starcom1 has similiar units that are are lower cost.

To adapt them to boat use - you would use the external speaker output of the VHF and set the VHF to priority 1. The clunky part would be the push to talk but could be done with any Icom units since they do sell external mics for most of the series they have...
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Old 09-03-2008
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Quite a lot of modern stereo FM car radios have a cut-off built in to enable them to be used with hands free mobile phones and in-car navigation systems. See if your radio has such a feature.
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Old 09-03-2008
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Quote:
Originally Posted by eobpt View Post
Is there a way to get my marine radio to override my stereo system when a transmition occurs?

Thanks.
If you're handy with a soldering iron and a few small components, I've got a little DIY project that will do the trick. You can drop me an email

Eric, (KL7AJ)
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Old 09-04-2008
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There is so much VHF traffic where we sail that I wouldn't want the stereo to cut out for every transmission. I listen for keywords and then pay closer attention. I'd simply like a way to cut the cockpit speakers when I so choose. I'm planning a toggle to break the speaker circuit. Since the stereo was wired for years with no speakers on 2 of the amp channels with no damage, I'm assuming I can just open the connection to the cockpit speakers. It's simple, I just haven't gotten around to it.
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Old 09-04-2008
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There is a device that I pointed to looong ago in this forum that records every VHF transmission, and allows you to replay at the touch of a button. I'll see if I can find that old post....

Here it is:
"Last Call connects to your VHF radio and makes it simple to replay the last transmission received. Never miss another transmission or having to ask for a repeat message" Google Last Call (Captn' Jacks is OOB)

Last edited by eherlihy; 09-04-2008 at 10:48 AM.
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Old 09-04-2008
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Very cool. Combined with the stereo cut out switch, this would cover how I'd like it to work. Nice.

Last Call Marine - Marine radio recorder and playback device
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Old 09-04-2008
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Cockpit Amp

One of the first things we did when we bought Duet last year was to add a Poly-Planar amplifier for the cockpit speakers with its own volume control.

I was able to place the volume knob close to one of the speakers, near the wheel. Very convenient to be able to adjust the loudness for a variety of situations including VHF broadcasts, phone calls, docking, whatever.

We had seen this on one of the boats we used to charter. Here is one link:
Joe's - Poly-Planar ME-50 Marine Audio Amplifier for the model we used, although we bought it at Fisheries in Seattle. The wire for the volume control can be extended with a micro-jack extention cable if 10 feet isn't long enough.

Also, this solution assumes your stereo has output jacks for a rear amp.


Tom Hunt

Duet C470
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