[Kenwood] TS-850 Audible Whine

[cparrish104 at cfl.rr.com]

The TS-850 uses an external power supply.

K4TL

---- rbethman <rbethman at comcast.net> wrote: 
> This would most likely be the power supply fan.
> 
> They were either made by Panasonic or Matshusta.  These are bushing 
> motors.  Toss them!
> 
> Do yourself a favor.  Open the back up, and wire in a 12VDC Computer 
> Ball Bearing CPU fan.
> 
> Not only will the whine stop, but you can easily drop the running 
> current by half or more.
> 
> Did this to my TS-930SAT.  Cools well, and quiet as a mouse. Takes less 
> to run, thereby drops the 12VDC power bus load.
> 
> Bob - N0DGN
> 
> On 3/10/2013 4:56 PM, Mark Nace wrote:
> > Hello,
> > I have a 15+ year old TS-850 that still works well, but about 3 months ago, when
> > I key the rig, whether or not it is transmitting any power whatsoever, and even
> > when the ant. tuner is in action, I get an audible whirring sound from the back
> > of the unit.  Happens on all band positions and modes.  I have asked about my
> > signal quality and get good reports, and full output.
> >
> >
> > Could this be the fan inside the unit making that noise, or something more
> > sinister going on?
> >
> > Many thanks!
> > 73
> > Mark
> > N5KAE
> >
> 
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