CD/Radio without permanent 12V

[EdEssery]

I am planning to fit a car type CD/Radio to Skybird this winter. Does anybody know of a model that does not need a permanent 12V connection.

All the ones I've seen need permanent 12V to keep the radio station presets memorised. Without it you also need to enter a security code when you turn it on.

I prefer to fully isolate the battery when leaving the boat.

Any suggestions of suitable models and/or ideas.

Thanks,

Ed

 

[andyball]

Not seen anything modern that didn't need 12V to retain memory. Usually a separate wire drawing very very small current- so you could leave that connected direct to battery via a tiny fuse if you're that worried about not isolating the battery.

Pioneer DEH-P4100R loses presets,but requires no security code on reconnection (removable front panel type)

 

[stamfordian]

hi,
no suggestions on the models etc,but couldn,t you run a "dedicated "12v supply straight from the battery with 1amp/or correctly rated fuse,for chosen player,then you could still turn off the kill switch ,and retain the players memory?.Aimho of coarse.


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[byron]

This loss of pre-sets is an absolute pain. Every time I go back to my boat have have to go around and re-set 3 damn radios and its a bloomin' irritation.

http://www.alexander-advertising.co.uk

 

[Grehan]

Get one of the older ones that have mechanical presets. They work just as well.
Only problem - you'll not get one with a CD player.

I'm not being much help, am I Dad?

I'm in the phonebooth. It's the one across the Hall

 

[Gunfleet]

If you're not going to leave the boat for v long periods, you can buy a gizmo that takes a small battery and plugs into your cigar lighter from Halfords. It will provide enough power to keep your radio memory going. So if you switch off your batteries but leave the house switches on, this should do the trick.

 

[vyv_cox]

I have two radios on board. The Blaupunkt (Boston, I think) has a removable security card and all station data is contained on it. No reprogramming is required on switching on, but you need to remember to bring the card with you. The Sony requires a separate line and, like you, I don't like to leave any live circuits on board. I have run a permanent light wire with a small fuse to overcome this.

I wasn't aware of the Halford's gizmo - will definitely investigate this one.

 

[chriscallender]

As other posters have said, there is a second power connection to the radio which provides the power just to retain the memory.

If you get hold of a PP3 battery connector and connect it positive to this line and negative to the radio's ground. Then you can leave this line powered up from a PP3 9v battery which will probably last for ages(years?). Almost any car radio will easily keep its memory on 9v, since the normal car battery voltage will go below this during engine starting. There are also some small camera batteries etc that give 12v but sourcing a battery connector for them could be harder.

I'm fitting a radio to my boat after christmas (assuming santa is good to me) and was going to do it this way.

 

[tr7v8]

All you'd need was a small Nicad battery and a diode and resistor. The battery would carge when connected to the main 12V power and supply the memory backup when required.

Jim
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