I missed the original post - was the power supply not only charging the
batteries but also powering the load (repeater)? If so, then when the
Astron goes into into voltage foldback (constant-current mode), the load
is going to get something less than 13.8V.
The foldback on all of the non-V (variable) series Astron linears I've
seen uses fixed resistors in the regulator circuit to set the foldback
point. Of the ones I've tested (including an RM-35A I had on the bench
last week), the foldback point is always higher than the rated output,
sometimes by a lot. The one I tested last week didn't fold back until
45A, even though it's only rated for 35A.
--- Jeff
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