what equipment are you using now? astron makes a automatic switch (it automagicly switches from AC to DC with loss of AC) there are a couple other makers, I'm sure. you'll also have to consider battery charger(s) too.
wm5c <[EMAIL PROTECTED]> wrote: Hi, New member here. Thanks for allowing me to join. Our club has acquired some large lead-acid 12v batteries we would like to use to back up our repeater in emergency situations. Does anyone know of a good (but simple and inexpensive [we are a very small group in a very small town]) circuit to accomplish this? Any input would be appreciated. Danny WM5C Heart Of Texas Ham Operators Group (HOTHOG) Brady, TX www.hothog.org __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com