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On Thu, 26 Oct 2006 00:22:01 GMT, ml wrote:
I was thinking of getting a jado fuel cell, it puts out 100w (about 8amps ?) @12vdc Hi Myles, Fuel Cell??? That is a pretty pricey option. More than likely it is 100WH (Watt-hour, not Watt) rated. wanted to power a 2m rig at low power 5w out it falls w/in the spec's of the jado but i wanted a buffer Well, a 5W transmitter is not going to load it too heavily, but you have to figure that 5W out is a 10W demand on the battery. This means your battery will work 8 - 10 Hours continuous (you don't sit on the key, do you?). at first i thought of a battery using the full cell to charge the battery during receive since tx is brief but how do i calculate A battery - fuel cell - battery? how big a battery i need? At least 100WH, undoubtedly more. Why charge a fuel cell with a battery? Why not cut out the middle man and just run battery operation? i also wondering if perhaps a capacitor or a few of them might also do the trick and if so how to size them Not unless you can assemble a couple hundred Farads (note the complete absence of pico, nano, or micro in that Farads). The short version is DON'T GO THERE. 73's Richard Clark, KB7QHC |
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