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Shaggy365
New member
Username: Shaggy365
Post Number: 4
Registered: 11-2008
| | Posted on Friday, December 12, 2008 - 9:36 am: | 
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Hello,could it do any damage if i run my Fatboy mobile 2 pill(2879's) on my marine deep cycle batt.Right now im only getting about 200 out of it ,would it mess up the amps transitors eventually?. I am running a rci 2980 dead keying 2 1/2 watts swinging about 35-40 into the amp.They say the amp is suppose to do 450-500. It is a highdrive.Or should i wait a just get a powersupply,And what size.And also what does highdrive mean. |
Shaggy365
New member
Username: Shaggy365
Post Number: 5
Registered: 11-2008
| | Posted on Friday, December 12, 2008 - 8:38 pm: |
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Anybody? |
Tech808
Moderator
Username: Tech808
Post Number: 16359
Registered: 8-2002
| | Posted on Saturday, December 13, 2008 - 12:17 am: |
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Shaggy365,
WELCOME to the Copper Electronics Forum,
I have never just used a battery by it's self to run a mobile amp before so can't help there.
To determine what size Power Supply you will need go to:
Copper Talk
» Subscriber (Preview)
» Articles
» WHICH POWER SUPPLY DO YOU NEED?
Hope this help's,
Lon~Tech808
CEF#0808/HAM#001/CVC#0002
Tech808@copperelectronics.com
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Shaggy365
New member
Username: Shaggy365
Post Number: 6
Registered: 11-2008
| | Posted on Saturday, December 13, 2008 - 9:06 am: |
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Ok, thanks tech808. |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 4437
Registered: 7-2004
| | Posted on Saturday, December 13, 2008 - 11:06 am: |
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shaggy, 1st, 2 & 1/2 watts dead key into the fatboy should be fine....adjust radio DEAD KEY til dead key of AMPLIFIER is around 100 watts or less, then turn up mic gain til AMPLIFIER swings(PEP) to around 300. check how HOT it gets, you MAY be able to increase mic gain to show 400 watts PEP from amplifier. MAYBE. you will NOT see anywhere near 500 swing using just a battery, no matter how fully charged it is. without having a battery charger on the battery AND running, every time you key up, the battery's voltage will drop & power output will drop. probably won't cause any damage to amplifier til voltage drops enough where relay in amplifier starts to chatter as soon as you key up.
as for using a battery charger on a battery inside a house.....you really shouldn't. a sealed battery(like an optima) MAY not allow any gasses to escape inside the house, but if it is NOT a sealed battery, the heating of the fluid by the discharge of keying & charge from the charger may just eventually overcome you....& you'll be found in a heap on the floor in the morning. i have built an 'outside battery & charger setup' twice, using the outside entrance to a basement for a couple people. ventilated to the outside with no air infiltration inside to the basement. one is currently in use after over 10 years. probably not worth the cost or effort vs buying a couple of power supplies.
that fatboy may draw less then 20 amps dead key, but 'swing' & it may pull over 50. MAYBE. i wouldn't try anything less then 50 amps with a 2 pill custom amp, if it shuts down/throws breaker/won't do 400 PEP without struggling, parallel a 2nd PS & you'll be good.
more expensive then a battery for sure, but better then killing youself & burning down the house  . |
Shaggy365
New member
Username: Shaggy365
Post Number: 7
Registered: 11-2008
| | Posted on Saturday, December 13, 2008 - 1:17 pm: |
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Thanks Patzerozero,Ill just wait to buy a 50 or more amp powersupply then. Yup,dont want to kill myself.How about a 60-65 amp,would that be better? |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 4439
Registered: 7-2004
| | Posted on Saturday, December 13, 2008 - 5:18 pm: |
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radio w/2w dead key, 25 PEP into a 2x2879 class 'C' davemade got about 100 key/365 PEP and pulled about 40 amps.
same radio, 3 key/14 PEP into a class'AB1' texas star dx350 got 75 key/240 PEP and pulled about 28 amps.
power supply is a 50 amp daiwa switching type.
i know the davemade can get 'hit' harder, but after 350 watts PEP output, it gets real trashy, so why bother? the fatboy will probably end up in the same boat. go with the biggest PS you can afford, minimum 50 amp & you should be good, 60 or 70 amp & you may be able to use texas star dx400/500 if the need arose. |
Shaggy365
New member
Username: Shaggy365
Post Number: 8
Registered: 11-2008
| | Posted on Saturday, December 13, 2008 - 6:04 pm: |
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Sounds good. Yup ill get a power supply.With the batt., 2 1/2-35pep into fatboy dead keying 100 swinging 200-225 is all shes doing.definatley will be getten power supply. In my pickup my 3900eghp is deadkey 1 1/2 swing 35,and the same amp is deakey about 100 swinging 350-450.I do need to raise the 3900 dead key,just havent got it done yet.All its got is low,med,high. and since i had the swing kit installed,my tech said not to run it on high or medium.Only run it on low.This radio is an AUUUUDIO MONSTER!!!.LOUD. |
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