[aprssig] Battery Backup using Astron Supplies...

[Kriss A Kliegle]

Here's the link I used to modify my Astrons:
http://www.repeater-builder.com/astron/astron-index.html
About halfway down the page is:

Battery Back-up modification for Astron Linear Series Power Supplies ...
Here's the schematic:
http://www.repeater-builder.com/astron/astron-rsbatmod.jpg

Enjoy!
Kriss KA1GJU

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