[ARC5] Dear Vibrating Smart People....

[Kenneth G. Gordon]

On 6 Dec 2012 at 13:06, David Stinson wrote:

> Yep... Snubber resistor is spec'ed as 1/2 watt.
> When the vibrator was new and "clean," that would 
> probably handle some small spikes.

Probably...

> 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.

A clue, Watson! A clue! :-)

> Possible this is a design defect- good only until the
> vibrator got a little "noisy."

Makes sense to me...there are lots of those around...design defects, I mean. 
Many don't show up until the gear has been used for a long time.

Ken W7EKB