I'm also running the same supply, the non rack
mount version. (Just mounted and secured on a
rack shelf)
I tested the supply pretty well, it still works
fine and runs very cool for the remaining
duration of its stay.
Got to love that burst electrolytic smell and
goo. Too bad the crowbar didn't fire. Before
Astron's latest pc board upgrade (which uses
my suggested pre-regulation circuit approach),
they also needed a crowbar circuit that worked.
(the early crowbar design was much subject to
mis-fires and not-at-home no fire operation).
Both the regulator pre-regulation and crow bar
circuits in newer Astron Supplies have been
re-engineered and updated. I now consider
the current generation of Astron Analog DC
Power Supplies to be much more reliable.
cheers,
skipp
> DCFluX <[EMAIL PROTECTED]> wrote:
> I should mention that I run a 40 amp tripplite
> power supply non-rack version.
>
> About a year ago it blew the PA and controller on my 64 repeater. For
> some reason the crow bar refused to fire and short out the supply
>
> The problem was electrolytic capacitors that were 16V in areas where
> 25 volts and alot of ripple are present. Tripplite is famous for not
> giving out schematics, but what I can tell is these caps were
> filtering the AC voltage from the transformers secondary tap for the
> main PCB. You can also put a voltmeter on AC and touch the output
> terminals and measure the "ripple" I think it was at 350mV for me
> before exploding and about 15mV now.
>
> I don't know what failed first but I had the capacitors explode and
> spray electrolyte on everything in the case. I had to replace all the
> active components on the PCB, the 4 pass transistors and the 2
> capacitors on the PCB, used 35V parts this time.
>
> Feel the face of the power supply, if it is about 130-140 degrees, you
> may have a problem. I thought it was normal, but on repair the face is
> running fairly cold.
>
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