[Kenwood] TS-850 Audible Whine

[Mark Nace]

Thanks for the info folks so far!!!  Yes, I have the PS-52 external supply, and 
its fan only comes on if I am doing any contesting, RTTY, or yelling through a 
pile-up barefoot.  

73
Mark


----- Original Message ----
> From: "cparrish104 at cfl.rr.com" <cparrish104 at cfl.rr.com>
> To: kenwood at mailman.qth.net
> Sent: Sun, March 10, 2013 4:55:26 PM
> Subject: Re: [Kenwood] TS-850 Audible Whine
> 
> 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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