H744 regulator whistle

From: Pete Turnbull <pete_at_dunnington.u-net.com>
Date: Sat Jan 12 19:58:34 2002

On Jan 12, 20:14, jpero_at_sympatico.ca wrote:

> Sounds like PSU is reacting to overloading or medium shorts
> downstream of that PSU outputs. Also can happen with dried
> up capacitors (too high ESR).

I don't think it's any of those. The regulators all make a similar noise
when I put them on a dummy load drawing 5A, on the bench. And I'm sure
it's not bad caps, as two of them are ones I repaired recently.

Maybe I'm just sensitive to that frequency range :-(

Pete						Peter Turnbull
						Network Manager
						University of York
Received on Sat Jan 12 2002 - 19:58:34 GMT

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