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?
73
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
-------------------------------------
Jon Ogden
NA9D (ex: KE9NA)
Member: ARRL, AMSAT, DXCC, NRA
http://www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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