[ARC5] Dear Vibrating Smart People....

J. Forster jfor at quikus.com
Thu Dec 6 14:16:25 EST 2012


How about 'scoping it?

I'd first 'scope the vibrator alone, with a couple of resistive loads, to
see what the switching waveforms look like.

Best,

-John

===================






> Yep... Snubber resistor is spec'ed as 1/2 watt.
> When the vibrator was new and "clean," that would
> probably handle some small spikes.
>
> However-  I've looked at 4 of these supplies now.
> In every case, the snubber resistor had drifted high-
> one as high as 60,000 Ohms, likely from heat.
> Possible this is a design defect- good only until the
> vibrator got a little "noisy."
>
>
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