You could also check out West Mountain Radio's website <http://www.westmountainradio.com/>. They make a little unit called the PWRgate (two models) for the Ham Radio community which will act as priority switch to float a storage/deep cell battery for battery power backup and switch between a backup battery and a power supply for a ham rig. I am sure it would work great on a PBX. Look also at the Anderson PowerPoles. Great connectors when working with high amperage DC. I think West Mountain sells them and their crimping tool tool and so does <www.powerwerx.com>. Both advertise in QST and CQ Amateur Radio magazines. Good stuff with great reputations.
Best of luck Tom Bishop W8TAB Paul H. Gusciora wrote: > I posted some messages about my investigations about the charger > circuitry to the group more than one year ago. > > You can use 12V marine deep-cycle batteries (120 A Hr) to power the > switch. I think that I calculated 24 hours of run on a fully loaded > swithc from one set of two. The charger only trickle charges the > batteries. After the batteries discharge, you will want to use > something else to charge them. > > I believe that you will want to set something up that allows > disconnecting batteries so that you can connect them to an external > charger. I started to set this up for the one system that I manage, > and then the system owner (my spouse) lost interest. I had purchased > heavy duty connectors and was going to connect them to the batteries > through 50 A fuses on both sides so that I could rapidly remove them > and charge them, but I still would be protected ffom accidental > shorts. > > In your case you might want two sets of connectors to the phone with > diodes isolating the batteries so you could swap batteries out. > > Best regards, > Paul H. Gusciora > > ----- Original Message ----- > From: "Brent" <[EMAIL PROTECTED]> > To: <[email protected]> > Date: Mon, 8 Sep 2008 12:37:32 -0700 > Subject: KX-T: Extended Battery Back up for Kx-td1232 > > I live in an area with earthquakes and winter storms. When the power goes > out, it is usually out for 8 - 48 hours, which is longer than the normal > battery back-up lasts on the telephone switch. I would like to have a > battery back-up that would last 1-4 days for my kx-td1232. > > I currently have the regular battery back-up system with it's two little > lead/acid batteries and the charger/controller box that plugs into the > switch. Are there any plans, information, specification, or wiring diagrams > that would allow the use of larger gell cells or Optima batteries? I would > not want to put large batteries on the little charger build for the switch. > > Thank you in advance for your help. > > Brent. > > [EMAIL PROTECTED] > > _________________________________________________________________ > KX-T Mailing list --- http://kxthelp.com/ > Subscription changes: http://kxthelp.com/mailman/listinfo/kxt > > _________________________________________________________________ KX-T Mailing list --- http://kxthelp.com/ Subscription changes: http://kxthelp.com/mailman/listinfo/kxt
