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Author Topic: R4 and Sealed Lead Acid battries  (Read 3250 times)

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Offline bdasilva

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R4 and Sealed Lead Acid battries
« on: February 19, 2009, 05:15:05 PM »
Will a R4  run off a SLA? almost 13.5V at full charge
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Offline twatts (pants are so over-rated...)

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Re: R4 and Sealed Lead Acid battries
« Reply #1 on: February 19, 2009, 05:34:46 PM »
Quote from: bdasilva on February 19, 2009, 05:15:05 PM
Will a R4  run off a SLA? almost 13.5V at full charge

R4PRO uses 8AA batteries:  (8)x(1.5vDC) = 12vDC.  It also draws 1.4A.
http://www.edirol.com/index.php?option=com_content&task=view&id=30&Itemid=385

A 12vDC, 1400mAh SLA battery will power the R4 for 1hour.  Increasing the Voltage will not increase length of power, it will only increase the amount of power delivered.  If you deliver more than needed, the extra will be given off as heat.  Also, not sure what the min. vDC of the R4 is...  If you SLA drops in Voltage (typical), it may fail...  If the R4 is good for 9vDC - 14vDC, then you're probably golden... 

Terry


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Offline bdasilva

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Re: R4 and Sealed Lead Acid battries
« Reply #2 on: February 19, 2009, 05:41:21 PM »
No extra voltage but I have charged SLAs and I was scared to plug them in to the R4. If the polarity is correct the rest makes sense. Thanks.
Don't want to let the magic smoke out.
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Dorsey-Mod MK-012 w/ O, C, H and RED L/D Caps
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"Buy a Taper a Drink... Prime the Pumps of live Music"


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Offline bdasilva

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Re: R4 and Sealed Lead Acid battries
« Reply #3 on: February 19, 2009, 05:50:37 PM »
Whew... Works like a champ.   Does everyone know about magic smoke? Magic smoke is what makes electronics work. If you do something and let it out...  The gear just  stops working. Didn't you ever notice that?
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Dorsey-Mod MK-012 w/ O, C, H and RED L/D Caps
Superlux S502 ORTF   LSD2
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"Buy a Taper a Drink... Prime the Pumps of live Music"


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Offline Shawn

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Re: R4 and Sealed Lead Acid battries
« Reply #4 on: February 19, 2009, 06:16:01 PM »
I run mine off a 14v SLA and it works fine. I have blown a fuse in my battery cable setup at one point, but the R4 is fine at the voltage.
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Re: R4 and Sealed Lead Acid battries
« Reply #5 on: February 19, 2009, 06:35:53 PM »
Quote from: Shawn on February 19, 2009, 06:16:01 PM
I run mine off a 14v SLA and it works fine. I have blown a fuse in my battery cable setup at one point, but the R4 is fine at the voltage.

Yeah, throw a fuse on there and you'll be fine... 

Terry
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