At 4/28/2005 09:29 AM, you wrote:
> > "Brent" <[EMAIL PROTECTED]> wrote:
> > or better yet I had a trident ltr controller
> > on a uhf system and at times it would lock up
> > my rlc2 controller until i took it off the same
> > power source and used battery power it fixed
> > it.. but the trident controller was holding
> > the rlc controller in weird mode when it would
> > goto ltr channel 3
> >
>
>We have a story, which is pretty much the same
>animal as my described problem.
>
>Moving the one repeater over to another DC Power
>Supply solved the problem. All the original and
>spare equipment repeater hardward combinations
>now function as expected (normal).
>
>The orignal Triplite 40 Amp DC Supply measures
>just what it should. Something related to the
>output impedance, filtering (ESR), glitch or
>HF noise bypassing, grounding or lack of case
>cabinet negative rail grounding, ground loop is
>probably the the described problem source.
>There are two other controllers running off the
>same DC rail, some HF noise or logic glitching
>on the dc rails might be an issue.
Anytime I see power problems like this, I break out the scope & look for
oscillations on the voltage output. I once had a linear power supply that
broke into oscillation at ~55 kHz, causing TX spurs + & - same. Before it
caused the controller problems, it crowbared itself. The problem was a
cold solder joint on a 1000 uF output filter cap.
Bob NO6B
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