There are so many things to consider when you try to calculate battery requirements for emergency operation, is it really possible to accurately predict how long a given battery will last? Here are a few of the variables I'm aware of -
- battery type & amp/hour rating - starting charge state of battery - age & condition of battery - environmental conditions - temperature - loads other than K3 on battery, and whether constant or intermittant - mode(s) of transmission, i.e., PSK, CW, SSB - transmit power used for each mode - percentage of time for each mode vs. receive time - total operating time desired For me, a subjective approach makes the most sense. I would make some rough calculations but really pay attention to suggestions of those who have real world experience. One or two of deep cycle golf cart batteries would probably be all I ever would need. Then remember to keep them charged! Oh, and don't assume you need 100W to make contacts! :) Steve AA6VO ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
