>
>Hello everybody,
>
>A ham I know has a pair of 4-1000. He tried numerous squirrel cage fans and
>all he got was enormous fan noise and hardly any flow through the air
>sockets and pickle jar chimneys. Last I knew he was looking for a blower and
>some 4 inch hose to mount the beast outside.
>
>Has anyone tried 2 or 3 muffin fans in series--like an axial flow fan--to
>see if they will develop decent pressure?
>
? I tried it with 2 fans. Pressure increased -- but not nearly enough.
cheers, Steve wd0ct
>
>----- Original Message -----
>From: "Jon Ogden" <na9d@speakeasy.net>
>To: "measures" <2@vc.net>; "AMPS" <amps@contesting.com>
>Sent: Sunday, May 13, 2001 10:33 PM
>Subject: Re: [AMPS] Nichrome wire and tube chimneys!
>
>
>
>on 5/13/01 9:52 AM, measures at 2@vc.net wrote:
>
>> ? You don't seem to get it, Jon. A high-speed centrifugal blower is
>> required to overcome the back-pressure in the SK-510 air system socket.
>
>Perhaps I don't, Rich.
>
>And perhaps I am full of BS. But I prefer cooling systems that work in the
>direction of natural convection of heat. Heat flows up. So something that
>blows cool air over something in an upward direction is in my mind better
>than something that blows air across it.
>
>Your comments about the blower and the reduction of air flow are quite
>correct, I am sure. Yet, the guys at Eimac that designed the cooling system
>and chimneys and tubes way back when weren't a bunch of boobs either. I am
>sure they had good reason to do it that way.
>
>Jon
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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