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Originally Posted by patrick_g
Thomas, The jump pak is another good idea. I don't have one, as I favor a battery charger but they are a good thing too. Having both is not a bad idea. One consideration is the amp hour capacity of the jump pak. If you transfer much fuel you may flat out the little battery in the jump pak before you get done.
Buying a full wave bridge module (little box with 4 connections, two for the input AC and two for the output DC) and wiring it up to the transformer is trivial but... The first time you accidentally touch the DC leads together the little FWB module may give up the ghost. Some interesting things happen: 1. you get a current spike that may exceed the instantaneous current rating of the device, 2. the sparks you create with the intermittent contact interrupting the current flow allow the inductance of the transformer to generate some hefty voltages which may exceed the max reverse voltage rating of the device.
To build a circuit that will not self destruct requires short circuit/overload protection and starts getting above trivial construction. Any of several folks here could tell him how to wire the FWB module as it truly is trivial and some of us cold design a self protected circuit but...
Just buying a battery charger rated for at least (and hopefully more) more than 10 amps will git 'er done. A Jump Pak may be satisfactory too, if you don't need to run the pump very long or very often. Once deeply discharged it takes a while to charge them back up. Both charger and Pak are good ideas and provide a tool for other uses than fuel transfer. Whether or not the Paon k will pump long enough or frequently enough is the question I can't answer without more information about usage of the fuel system. How many gal/min will the pump transfer? Now many amp-hours does the candidate Jump Pak have?
Pat
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The ones I was talking about have 400 amp hours. Mine is about that size and I can run my 10000 pound winch with it for a short period of time. I dont imagine that a 10 amp pump will tax it that much. I agree that a battery charger will work well also and both have dual purpose uses. My idea for the jump pack is that it might be easier to hook up than the battery charger if you use the tractor battery for a filter. Also the jump packs are handy if you have a dead battery and you are not close to AC to hook up the jumper cables. After the last time that I tried jumping a battery with a short and had to replace an alternator I try to look for methods that dont involve using jumper cables. You can charge the jumper packs several ways. there is a small ac-dc charger unit that comes with it. there is usually also a lighter plug connector that has larger wires so I am assuming more amperage transfer capacity and I believe you can also hook it up to a hot battery and let it get a partial charge off of that. I just got mine because it was handy and I was in a hurry. For more money you can get some with really high current capabilities. If I see the need for it I might get one of the 800 to 900 amp hour models. The only thing about those are that they are usually just a jump pack the smaller ones like mine usually have the pump and light in them. Just the thing to carry along on a trip.
The idea of making a full wave rectifier circuit was a joke. (I Need to remember to put that disclaimer in there). I saw that he had taken the transformer back. I would have just taken and made the device put an 1 amp fast blow in the primary circuit put a large current zener across the outpout and crossed my fingers
