[AMRadio] R-390 heat and covers...

[rbethman]

This is especially true for the pair of regulator tubes at the bottom 
left rear of the R-390 chassis.

I copied Roy on my last reply.  Hopefully he'll chime in later, he 
usually does fairly late in the day.

He came up with his fan setup, and it requires NO additional holes!  
That is a plus!

Keeping those tubes heat level down, also increases their life span.  
They aren't getting any cheaper!

Rick - Here is the list info:

> R-390 mailing list
> Home:http://mailman.qth.net/mailman/listinfo/r-390
> Help:http://mailman.qth.net/mmfaq.htm
> Post:mailto:R-390 at mailman.qth.net
>
You will benefit greatly from joining!

Bob - N0DGN

On 5/11/2011 11:44 AM, Geoff Edmonson wrote:
> On 05/11/2011 11:25 AM, Rick wrote:
>> It seems I remember some saying it's best to leave, at least, the bottom
>> cover off the R-390/URR when rack mounted due to the extreme heat generated
>> by the regulator tubes. In fact, I think some have mentioned placing a small
>> muffin fan to draw the heat away from the inside of the rack. I would
>> appreciate any comments on this.
>>
> That's always good advice for any device that generates heat.  Heat
> kills.  Fans are often found on Rangers, Viking II's and any other tube
> gear that generates heat.
>
> Copious amount of air flow will extend the life of most any piece of
> equipment that converts electricity into heat.
>
> -Geoff/W5OMR