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post #1 of 25 Old 12-21-2014 Thread Starter
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Stereo Power Installation

Intro: US Yacht 25. This year new battery box, complete rewire and new electrical panel wired per MainSail et.al.

Now to the fun stuff. I have a stereo, with wood cabinet. Proper electrical buss bars for all stereo and electrical connections.

My question: I have everything routed through the Master on/off switch. I'm wondering if the receiver will lose memory (radio stations) when the boat is switched off. This is an automotive 12v stereo. It has three + wires;

ATT (Light blue wire)
ACC (red wire)
Battery (yellow wire).

What does the general boating population do regarding stereos?

thanks,
Chris
Kennewick, Wa.

Chris
US Yacht 25 "Chinook"
Kennewick, Wa.
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post #2 of 25 Old 12-21-2014
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Re: Stereo Power Installation

Quote:
Originally Posted by budvar View Post
Intro: US Yacht 25. This year new battery box, complete rewire and new electrical panel wired per MainSail et.al.

Now to the fun stuff. I have a stereo, with wood cabinet. Proper electrical buss bars for all stereo and electrical connections.

My question: I have everything routed through the Master on/off switch. I'm wondering if the receiver will lose memory (radio stations) when the boat is switched off. This is an automotive 12v stereo. It has three + wires;

ATT (Light blue wire)
ACC (red wire)
Battery (yellow wire).

What does the general boating population do regarding stereos?

thanks,
Chris
Kennewick, Wa.
i have an old am/fm /sw radio on d cell batteries all i need for music ... if all else fails sing or whistle
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post #3 of 25 Old 12-21-2014
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Re: Stereo Power Installation

One of the wires should be conneced to the baery direcly if you do not want to loose he memory settings. I am not sure but yellow wire to the battery (direct connection), red wire to the battery switch.
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post #4 of 25 Old 12-21-2014
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Re: Stereo Power Installation

Yellow direct to battery (use a fuse), that will save your memory...

Nothing wrong with wanting some music on your boat. I was in the other camp for many years (not wanting music of any kind, wanting the "pure" sailing experience)... Thankfully I've had the opportunity to sail frequently in recent years (enough that I can no longer count the number of times I go)... Having some music sometimes is just the ticket to make the sail perfect. This especially while out on the lake alone, nobody to talk to, and nobody else to disturb.

I frequently use the radio as "background noise" when I am doing a weekday sail.

That being said I too am planning on installing a stereo, but am hopefully NOT rewiring the boat this winter. I am putting in electronics so who knows.
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post #5 of 25 Old 12-21-2014
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Re: Stereo Power Installation

Chris-
Either you drain the battery, let the memory get wiped, buy a marine stereo, or do something else to handle the problem.
You could add in an "alarm" battery to supply backup power to the yellow lead. Or measure it, if the drain is 5-10mA that won't bother your battery for a couple of weeks at a time.
A few marine radios use non-volatile memory to avoid that problem. Older car stereos with push buttons don't have that problem. And of course if you don't listen to preset stations, it just doesn't matter.
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post #6 of 25 Old 12-22-2014
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Re: Stereo Power Installation

KISS

stereo-battery connection

Stu Jackson, C34, 1986, M25 engine, Rocna 10 (22#)
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post #7 of 25 Old 12-22-2014
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Re: Stereo Power Installation

You know I had a simple deep cycle battery, with a 3.5hp motor... I had a 14x14" solar panel hooked directly to a cigarette lighter outlet.. WE don't have power, I don't have an alternator...

My radio never killed my battery by having my $35 marine stereo (that took USB or SD cards), it was 40 watts, super short depth, with a remote. I think I got it at buy.com. I got about 12 stations after I connected to the masthead antenna. In retrospect I'd have done better with a regular fm radio antenna.... However, I got one of the XM roady receivers and piped it into the aux port on the radio... Crystal clear tunes, no issues.
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post #8 of 25 Old 12-22-2014
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The small power to maintain the radio's memory uses an infinitesimal small amount of power. It will take a long, long time to drain your battery. So don't do it if you never use your boat. Just saying.

Tod
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post #9 of 25 Old 12-22-2014
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Re: Stereo Power Installation

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Originally Posted by Gladrags1 View Post
The small power to maintain the radio's memory uses an infinitesimal small amount of power. It will take a long, long time to drain your battery. So don't do it if you never use your boat. Just saying.

Tod
Our Kenwood draws 0.002A..... It would take three full weeks to use just 1 Ah... On a 400Ah bank this is three weeks to use 0.25% of the banks capacity....

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post #10 of 25 Old 12-22-2014
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Re: Stereo Power Installation

Exactly.

Mandolin
Bayfield 36
Sailing out of Rock Creek, Chesapeake Bay
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