At 09:11 PM 6/7/2005, Doug Zastrow wrote:
>Dave,
>
>Did you ever run into the problem of back feed from the batteries
>damaging the regulator chip during AC failures? In my case Astron
>specifically told me not to float the batteries in parallel with an
>RS-20M because of that potential problem. This <Battery Back-Up
>Modification of Astron Power Supplies.htm>Repeater Builder article
>discusses the issue and a mod.
Nope. I've seen a mod to alter the output voltage but you also have
to adjust their crowbar.
If you don't disconnect or adjust the crowbar, then that could be a
big problem.
>
>Astron does make their linear supplies in a battery backup model
>which uses essentially the same network that Matthew has.
Anything with a sense input will work, just connect the sense input
to the battery, and put a diode between the supply and the battery.
>I whole-heartedly agree that floating a supply across the battery
>string (if the supply will tolerate such) is the ideal.
>
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