On Sun, 14 Oct 2012 15:31:26 +0800, who where wrote:

If you don't have the rather rare maintenance manual, I can send a
part schematic to a valid email addie if you wish.

Scanned IFR manuals and schematics can be found at:
http://www.repeater-builder.com/test-equipment/aeroflex/aeroflex-index.html

The IFR-1500 charger circuit is worse:
http://802.11junk.com/jeffl/crud/IFR-1500%20battery%20charger.jpg
Same 14.2V float. I'm using 13.8V for gel cell float voltage.
http://www.powerstream.com/SLA.htm

Thanks much for the details.
--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558