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Original way to use car radio as a garage radio

John Canon

Jun 1, 2022
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This could be a dream. I take a 12 volt AM radio. I connect 2 lead acid batteries (6 volt each) in series with 4 gauge jumper cables. I use a C-clamp to attach the antenna to the window sill in the garage.

Then I can listen to the radio in the garage just like Grandpa did. Maybe I am still dreaming.
 

crutschow

May 7, 2021
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I take a 12 volt AM radio. I connect 2 lead acid batteries (6 volt each) in series with 4 gauge jumper cables.
That should work fine, no dream, but you don't need 4 gauge wire, as that's for carrying starter level current.
For the radio you shouldn't need anything larger than 16 gauge.
But put a 10A fuse in series with the battery wire to protect against accidental shorts.
 

John Canon

Jun 1, 2022
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Oh-oh. I think I have an old Canadian Tire battery charger in the closet somewhere. I am pretty sure it does 6 and 12 volt charging.
 

crutschow

May 7, 2021
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Oh-oh. I think I have an old Canadian Tire battery charger in the closet somewhere. I am pretty sure it does 6 and 12 volt charging.
Yes, but chargers don't but out a steady DC, they use the battery for that.
So you'd have to connect it to a 12V battery to get smooth DC.
Also the charger by itself will likely output a much higher voltage than 12V.
 

Bluejets

Oct 5, 2014
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Simple to put on a 2 way switch, charge when not in use.
No problem with excess voltage, car alternators do it every day.
 

ramussons

Jun 10, 2014
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This could be a dream. I take a 12 volt AM radio. I connect 2 lead acid batteries (6 volt each) in series with 4 gauge jumper cables. I use a C-clamp to attach the antenna to the window sill in the garage.

Then I can listen to the radio in the garage just like Grandpa did. Maybe I am still dreaming.
I think you'll also need a pair of speakers, no?
 

crutschow

May 7, 2021
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No problem with excess voltage, car alternators do it every day.
I was concerned that the output voltage on the battery charger without a battery load would go above the 14.5V or so maximum voltage of an alternator connected to a battery.
 

Martaine2005

May 12, 2015
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This could be a dream. I take a 12 volt AM radio. I connect 2 lead acid batteries (6 volt each) in series with 4 gauge jumper cables. I use a C-clamp to attach the antenna to the window sill in the garage.

Then I can listen to the radio in the garage just like Grandpa did. Maybe I am still dreaming.
I didn’t see this as a question.
I thought he was telling a story of how grandpa listened to his car radio in the garage.
Especially the part about using a ‘C’ clamp to hold the antenna!.

Martin
 

ivak245

Jun 11, 2021
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Jun 11, 2021
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And make sure the antenna is not touching any metal part of the shed, you won't receive any signals that way. I used to run car cassette players in the shed for many years using "dead" car batteries ( not good enough to start a car, but will run the radio for many weeks), with a charge up every couple of weeks.
 
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