> >For example, I have a 550VA APC that I connected a truck > battery to... > > > This is for coping with all those ham-induced PLC failures > and resulting > power outages, eh? > > :-) > > John Well, actually, the TX is not on the UPS, but it is on the emergency genset. The TX controller is on the UPS, so as soon as the genset kicks in, we're back on the air! 73, Ralph W5JGV - WC2XSR/13 http://www.emachine.com