At 11:18 PM 6/27/2005, Kevin Rock wrote... >If I have done this correctly you should be able to run a QRP rig key down for >approximately 14 minutes with a fully charged 5K Farad ultracapacitor.
Discharge curves vary significantly between caps and batteries. Caps discharge exponentially, and the voltage would drop to an unusable level rather quickly. Chemical batteries have a much flatter discharge curve, and much more of the available power is therefore useful. More of the available power in a cap could be used with active voltage regulation (step-up), but that would bring further inefficiencies into play. Mike Sauve W8UR _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
