on 5/14/01 10:06 AM, Bob & Linda McGraw K4TAX at RMcGraw@InfoAve.Net wrote:
> As to blowers, a centrifugal blower is the only way to go. Muffin fans
> just won't produce the required air flow with typical back pressures
> presented by air system sockets. My experience says big diameter wheels
> that are 2" wide are better than small wheels that are 4" to 6" wide.
> Even though the two fans may spec that same CFM, this has to do with
> radial velocity.
Also, some people have said that centrifugal blowers are hard to find.
I see numerous blowers at every hamfest I go to. They aren't that rare.
Yet I've never seen a muffin fan as big or bigger than a 4-1000A or 3-1000A
at any hamfest that I can remember.
73,
Jon
NA9D
-------------------------------------
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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