[R-390] Ventilation

[William J.Neill]

I have my R-390( )'s and various other receivers mounted in five 
separate CY-1119/U racks, with two receivers per rack, along with 
auxiliary equipment such as CV-591A's and CV-116( )'s.  With just one 
rack operating (I run dual diversity:  frequency or space), I can heat a 
goodly portion of my house in chilly weather and in cold weather, I can 
keep the house warm with two racks operating.

Having used lots of R-390( )'s during my military career, ventilation 
was not of concern because of at least a 1.5-inch separation between 
receivers and other equipment in the same rack, a practice I maintain 
today because of my military experiences.  Of course, the consumption of 
electricity brings an audible sound of 60Hz to the house wiring and the 
lights in the nearby houses periodically flicker but, hey, who cares?  
Besides, Texas Utilities has lotsa transformers.

Bill Neill
Conroe, Texas

On Sunday, February 27, 2005, at 08:58 , mikea wrote:

> On Sun, Feb 27, 2005 at 08:51:36AM -0500, Steve Hobensack wrote:
>> I have an R-390a inside a cv-979 cabinet and that just fits in a cubby 
>> hole
>> on a computer table. There is not much spare room and the unit gets 
>> quite
>> warm due to lack of proper ventilation. How would one install a 
>> cooling fan?
>> Is a fan necessary? Thanks
>> ...Steve...N8YE
>
> Necessary? No.
>
> A good idea? _VERY_ much so. Putting a fan in to move air through the
> radio will do wonders for extending its MTBF. Hot components change
> value faster, and they die faster.
>
> How? I don't have a CY-979 to play with, and don't know where the
> cooling apertures -- if any -- are. But I'd give serious thought to
> putting a fan under the bottom, pushing air in, and one on the top,
> pulling air out, even if I had to make holes to do it.
>
> --
> Mike Andrews, W5EGO
> mikea at mikea.ath.cx
> Tired old sysadmin