I have an Astron RS-35M. I load it down with 1 ohm and it wont come up when I flip the power on. I load it with an 8amp load and it comes up but there is quite a delay. If I power up the supply before I add the load, there seems to be no problem.
Is this normal.
Thanks Mike
when
there
Yes. I have no problem with a 20 amp load though. I think it is factory set to Short protect trip at 40 amps, and crowbar at 15v (big issue for battery float) but the regulator takes a half second on power-up for the caps to charge. After the trip, power must be removed for a few minutes to reset it. One way to deal with this problem is to set current limit to a lower level. The supply can be easily modded to the VS-35M by adding the pots. Making these screw adjust behind a vent keeps these from being bumped and avoids drilling the steel front panel.
Several versions of PDF schematics and discussions of the idiosyncrasies and mods are available on the Internet.
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