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Date:         Fri, 21 May 2010 19:01:54 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Voltage surges
Comments: To: "Mike \"Rocket J Squirrel\"" <camping.elliott@gmail.com>
In-Reply-To:  <4BF70A51.1060509@gmail.com>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 06:33 PM 5/21/2010, Mike \"Rocket J Squirrel\" wrote: >Mister Oscilloscope shows that the voltage surge is about 300mv in >amplitude, occurs every 1.04 seconds, and is about 100ms in >duration. None of these features change with additional circuit >loading (e.g., turning on the headlights), nor with engine rpm. > >This doesn't sound to me like a voltage regulator problem.

Nope, me either. Gotta be a load, and I think you've nailed it below. Though I'm curious that it's an increase and not a decrease.

>I wonder if I've got an active load of some sort pulling on the >electrical generation system, such as my DC > DC battery charger >which can haul up to 15A out of the system for charging the deep >cycle house battery.

Lots of modern battery chargers will pulse-charge at more-or-less full output once the battery leaves the deep-drained condition.

d


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