[MRCA] EMCU-116 Power Supply Troubleshooting

[Peter Gottlieb]

I still have a couple of these.  I had figured I'd use one to charge the 24 volt 
system while driving.  I think most of them whine, they run at a rather low 
switching frequency.  The question is only how loud.

Peter


On 7/12/2014 6:28 PM, Alex J Rokowetz via MRCA wrote:
> Gents,
>
> I picked up and EMCU-116 at Dayton this year for very small money.  Here's a 
> link to Brooke Clark's page on the unit:
>
> http://www.prc68.com/I/EMCU116.shtml
>
> It powers up and puts out the correct voltage but makes a whining noise when 
> powered on.  The whine does not go away.  I can't imagine this is normal for 
> the unit but wanted to see if one of you had one of these and whether or not 
> your unit makes the same whine.  If this whine is abnormal I (as I suspect it 
> is) what component within the power supply could be making this noise?
>
> I have uploaded two videos of the power supply being turned on and off so you 
> could hear the whining noise.  One video has the cover on and the other 
> video has the cover off.
>
> https://app.box.com/s/blme6vjs26l561dss3kq
>
> I would appreciate any guidance you may have.
>
> Thanks,
>
> Alex
> K2AJR
>
>
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