[Amps] Adequate Cooling Air for Four 811A's

[Jim White, K4OJ]

I have been seeing the price on residential air conditioners drop to around
hundred bucks...it is almost at the point that I am thinking about adding a
"wall shaker" for cooling of the amps....has anyone done this...by driving
the  cooled air through dryer vent kit hose it seems this could only enhance
keeping the tubes cool...

Thoughts?

Jim, K4OJ

----- Original Message -----
From: "Steve Katz" <stevek@jmr.com>
To: "'Bill Smith'" <ko4nrbs@yahoo.com>; <amps@contesting.com>
Sent: Monday, February 25, 2002 1:13 PM
Subject: RE: [Amps] Adequate Cooling Air for Four 811A's


>
>
>
> > How much air should I provide to keep four 811A's
> > cool?  Thought I would buy a new Dayton Squirrel cage
> > Fan.
> >
> Won't that make the squirrels dizzy?
>
> Seriously, 811A's aren't "forced air cooled" tubes.  I'd think a
> 120mm "muffin" type fan would be more than sufficient.  Squirrel-cage fans
> (centrifugal blowers) are designed to provide a lot of air pressure
against
> heavily restricted systems, such as external anode tubes.  With no
> restrictions, they have no advantage whatever, and indeed actually move
far
> less air (volume) than similarly sized axial fans.
>
> WB2WIK/6
> > 73,
> > Bill
> >
> > =====
> > Bill Smith KO4NR
> >
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