Chappy, I am not as enthusiastic about the TKR's "excellent" battery backup feature as you are; I would say it is "okay." It is only designed to trickle-charge a backup battery, not recharge it after an extended outage. It may take several days or a week to fully recharge an exhausted battery.
My recommendation is to get two gelled-electrolyte batteries- not wet-cell automotive or marine batteries- and wire them independently to the two repeaters. Wet-cell batteries have both caustic and hydrogen emissions that gel-cells do not. If you attempt to share backup chores for two repeaters, both go dead when that single backup dies. My vote is to keep them completely separate. 73, Eric Lemmon WB6FLY -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Chappy Sent: Monday, October 06, 2008 3:44 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Kenwood battery back-up Our club has recently acquired a TKR-750 and a TKR-850, to replace an aging hodgepodge of repeater components. Both the TKR's are co-located and share a Link RLC controller. We want to use the excellent battery-backup provisions of the TKR's, with a Wal-Mart marine battery. We plan to connect the one battery to both repeaters' battery ports in parallel, but activate the charging jumper on only one repeater. I guess we just want reassurance that there are no problems with this arrangment; any comments will be appreciated! Chappy Rice kd4ss
