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Thread: Capacitor Charging

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Posts: 1-10 of 10
2009-06-11 11:00:50
#1
Capacitor Charging
Whud up peeps! Hey can someone explain to me how to charge a capacitor? I know you cannot hook it directly to the battery but I'm not sure how to go about giving it a change before hooking it to the car power. Thanks
2009-06-11 13:35:43
#2
Originally Posted by Slow
Whud up peeps! Hey can someone explain to me how to charge a capacitor? I know you cannot hook it directly to the battery but I'm not sure how to go about giving it a change before hooking it to the car power. Thanks


most caps come with a restistor that you put in line on the power lead to slow charge it the first time. If don't use the restistor you will cut down on the life of the cap. Its funny back in the day we did not use the restistor we would just tap power on the cap for the for the first charge.
2009-06-11 15:59:38
#3
Crutchfield Tech Support: I just purchased a capacitor from Crutchfield, but how do I charge it?

The first time I did this, I held the resistor with my fingers! LOL

Joel, it says to get a 30ohm resistor.
2009-06-11 20:49:18
#4
Originally Posted by mirrortints
Crutchfield Tech Support: I just purchased a capacitor from Crutchfield, but how do I charge it?

The first time I did this, I held the resistor with my fingers! LOL

Joel, it says to get a 30ohm resistor.


OK kool thanks peeps.
2009-06-11 21:41:56
#5
Some caps, like the rockford fosgate ones require you to bring them to the store to get them charged. Thats just what i was told, i dont have an rf cap. But i am pretty sure they are most likely just using a common resistor set up like what has been mentioned.

That being said how lond can they hold a charge? I havent used mine in a year or so, so i am thinking its in need of a charge, someone correct me if i am wrong.
2009-06-11 21:47:25
#6
Why don't you invest in a multimeter and find out?
2009-06-11 22:14:43
#7
well i guess i could use my fluke and test it out. I was just asking a question being we are on the subject.
2009-06-11 22:50:27
#8
Originally Posted by insane
Some caps, like the rockford fosgate ones require you to bring them to the store to get them charged. Thats just what i was told, i dont have an rf cap. But i am pretty sure they are most likely just using a common resistor set up like what has been mentioned.

That being said how lond can they hold a charge? I havent used mine in a year or so, so i am thinking its in need of a charge, someone correct me if i am wrong.


A cap will lose its charge over time when unhooked. I cannot give you a time range because I have never tested it.
2009-06-12 00:39:57
#9
Not all capacitors loose charge over time.

Electrolytic capacitors will actually accumulate charge over time. This is why you should always properly discharge and short the terminals for long term storage.
2009-06-12 03:55:48
#10
Originally Posted by insane
Some caps, like the rockford fosgate ones require you to bring them to the store to get them charged. Thats just what i was told, i dont have an rf cap. But i am pretty sure they are most likely just using a common resistor set up like what has been mentioned.

That being said how lond can they hold a charge? I havent used mine in a year or so, so i am thinking its in need of a charge, someone correct me if i am wrong.


I have the Stynger 300 and it was out for and year and was totally discharged. Check it with you voltmeter.
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