Converting a battery radio to 12v
Submitted: Sunday, Sep 17, 2006 at 15:52
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Charlie & Rosemary
We have a portable transistor radio that works 240v or 8 x C cell batteries (equals 12v). Am I able to directly wire through one set of C cell battery terminals to a 12v battery (+ to +; - to -)?
Reply By: Mike Harding - Sunday, Sep 17, 2006 at 16:00
Sunday, Sep 17, 2006 at 16:00
Yes you may. Ensure when running from an external battery that the C cells are removed and it's probably best not to use the radio from a vehicle 12V system when the engine is running because the vehicle "12 volts" will be closer to 14V or 15V at that time - which the radio _may_ not like.
Mike Harding - who's about to start cooking a lasagna and open a bottle of decent wine :)
AnswerID:
194933
Follow Up By: Member - Crazy Dog (QLD) - Sunday, Sep 17, 2006 at 16:08
Sunday, Sep 17, 2006 at 16:08
Nah Mike,
The BREADON oven (13.5 kg gas bottle conversion job) with the
camp oven inside is now doin' the Sunday Lamb Roast.
Spuds, carrots, parsnips, peas, beans, pumpkin, gravy, mint sauce....yummo!
Should be ready 'bout 6'ish.....
Oh! and some tinnies as
well......
Grrr!!!
avva squizz
FollowupID:
452990
Follow Up By: kev.h - Sunday, Sep 17, 2006 at 22:16
Sunday, Sep 17, 2006 at 22:16
Hey crazy you got your 13.5 kg unit up & running (err should that be cooking) how goes it
Regards Kev
FollowupID:
453070
Follow Up By: Member - Crazy Dog (QLD) - Monday, Sep 18, 2006 at 17:27
Monday, Sep 18, 2006 at 17:27
Yummo - works a treat..
Grrr!!!
FollowupID:
453214
Reply By: Member - Crazy Dog (QLD) - Sunday, Sep 17, 2006 at 16:01
Sunday, Sep 17, 2006 at 16:01
Yo Charlie,
Are the batteries in a straight line at the back of the radio?
If so just put the pos wire from your 12v battery to the connecter at the pos end of the battery holder in the radio and do the same at the neg end with the neg from the 12v battery.
Grrr!!!
AnswerID:
194934
Follow Up By: Charlie & Rosemary - Sunday, Sep 17, 2006 at 16:08
Sunday, Sep 17, 2006 at 16:08
Ok, that makes a difference. There are 4 rows - 2 over 2. Each row is 2 C cells.
FollowupID:
452988
Follow Up By: Mike Harding - Sunday, Sep 17, 2006 at 16:14
Sunday, Sep 17, 2006 at 16:14
They will be wired in series giving 12V to the radio. Measure the end points with 8 C cells in place if you are concerned. They are encased in that manner simply to physically fit into the radio case. It would be most unusual (unheard of!) to put dry cells in parallel in this type of application.
Mike Harding
FollowupID:
452991
Follow Up By: Charlie & Rosemary - Sunday, Sep 17, 2006 at 16:24
Sunday, Sep 17, 2006 at 16:24
Terrific - I'll give it a go. Thanks for your help!
FollowupID:
452992
Follow Up By: Mr Fawlty - Monday, Sep 18, 2006 at 17:57
Monday, Sep 18, 2006 at 17:57
Once again I am in agreement with Mike, it won't have a series & parralel conections unless it is a tram...I wonder if Mike & I have the same taste in Femmes d' amour?...Pssssssssssst want some tips?
Like most 240 volt radios, cd players etc they all run on or around 12vdc with the first thing happening to the 240 VAC as soon as it gets inside the device being it's transformation & rectification. My Dad has a 1920 radio that has inside it a transformer and a mercury arc rectifier about as big as an
orange in a little glass sphere... amazingk stuff....& very illuminatingk
FollowupID:
453225
Follow Up By: Charlie & Rosemary - Monday, Sep 18, 2006 at 18:17
Monday, Sep 18, 2006 at 18:17
Thanks for the help everyone. We had a go today and it runs so we'll take it away
camping and see how it goes! Cheers!
FollowupID:
453233
Reply By: Charlie & Rosemary - Sunday, Sep 17, 2006 at 16:02
Sunday, Sep 17, 2006 at 16:02
Thank you! We will give it a go - it's not an expensive unit. We have a camper trailer and will use the trailer battery. Your advice there is very welcome! Cheers to you!
AnswerID:
194935