[Kenwood] Older Radio Fans and other things

[Mark Nace]

Thanks again to this great reflector.  With the unit all buttoned up, and the 
volume down, I can actually hear the fan just enough to know it's going.  So 
far, so good.  

73 to all,
Mark
N5KAE

 


----- Original Message ----
> From: rbethman <rbethman at comcast.net>
> To: kenwood at mailman.qth.net
> Sent: Fri, March 15, 2013 11:21:05 AM
> Subject: [Kenwood] Older Radio Fans and other things
> 
> I think we are ALL going to be seeing more of the fans becoming problematic.
> 
> The radios are getting older, and some things are becoming problematic.
> 
> I have found the ATUs to have developed some issues.  Heeding lubrication where 
>the shaft goes through to the Air Variables.  I also found that the couplings 
>needed some tightening of the set screws.
> 
> It looks like the Thermistors or Thermal Switches are also giving up and going 
>south.
> 
> That was what caused my fan in the Power supply to not work.
> 
> It took some doing to locate the thermal switch connections, jumper them, and 
>then put in a good fan that draws less current than the stated rating on the 
>fan.
> 
> I also took it from three blades to something like 6 or 8.  I have constant air 
>flow now, and won't have issues with the power supply board and all the voltage 
>regulators.
> 
> Bob - N0DGN
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