[Kenwood] TS-850 Audible Whine

[rbethman]

The radio itself has a fan unit.

If there is a constant whine, check to see if it is where the whine is 
coming from.

IF that is it, use a ball bearing 12VDC CPU fan to replace it.

Second possibility.  (I've run into this also.)  The ATU motors have a 
bushing that can cause issues.  Lube it.

Check the coupling between the ATU drive motors and the rotating capacitor.

I've had that be loose, and cause grief.  It uses a tiny metric setscrew.

Tightened mine, lubed the coupling, and all is well.

Bob - N0DGN

On 3/10/2013 6:45 PM, Mark Nace wrote:
> 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
>
>
>