[R-390] Black Tube Shields, IERC and cooling fans

[Jim]

Dick,
You are right, but as this stuff gets older I feel that 20-30 years of 
running hotter than H is enough and the radios deserve a break.
I use small fans on all my tube rigs.

Jim


> The original owners ran these 24/7 in most cases. Why fix what ain't broke 
> ??
>
> 73, Dick, W1KSZ
>
> -----Original Message-----
>>From: Steve Toth <stoth47 at yahoo.com>
>>Sent: Apr 17, 2009 2:30 PM
>>To: r-390 at mailman.qth.net
>>Subject: Re: [R-390] Black Tube Shields, IERC and cooling fans
>>
>>
>>Tish
>>I don't have enough IERC shields (yet) for my two R390A's, so I'm running 
>>selective tubes with IERC shields and the rest without any shields. I've 
>>been contemplating installing a fan or two on the receivers to circulate 
>>the air. What diameter fan(s) did you use and what was the placement?
>>
>>I was considering 12volt fans with approximately the same blade diameter 
>>as the side panel hole - maybe one fan per side to pull air out of the 
>>chassis. Bottom left side rear (AF deck) or upper left side front (IF 
>>deck) combined with a bottom right side front (Pwr Supply) or upper right 
>>side rear (RF deck). I'm tending towards the IF deck and power supply 
>>placements.
>>
>>Any input is appreciated.
>>
>>
>>
>>
>>
>>
>>
>>
>>-- Steve, K7PZN
>>Woodinville, WA
>>If you can read this, thank a teacher; if you're reading this in English, 
>>thank a military veteran.
>>
>>
>>--- On Fri, 4/17/09, Tisha Hayes <tisha.hayes at gmail.com> wrote:
>>
>>From: Tisha Hayes <tisha.hayes at gmail.com>
>>Subject: Re: [R-390] Black Tube Shields, IERC
>>To: r-390 at mailman.qth.net
>>Date: Friday, April 17, 2009, 10:09 AM
>>
>>In every instance, the use of a small computer-fan to move air across the
>>chassis really helped out in lowering the temperature of the tubes and the
>>chassis. This does not need to be a gigantic fan.
>>
>>-- 
>>Ms. Tisha Hayes
>>
>>----------------
>>"I will not recant the truth. I am corn, not chaff; I will not be blown
>>away
>>with the wind or burst by the flail. I will survive both."
>>-Walter Milne, 1558
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