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Re: [RFI] Brushless vs Brush Fans & RFI?

To: "RFI List" <rfi@contesting.com>
Subject: Re: [RFI] Brushless vs Brush Fans & RFI?
From: "Cortland Richmond" <ka5s@earthlink.net>
Reply-to: ka5s@earthlink.net
Date: Tue, 10 Jan 2006 10:17:15 -0800
List-post: <mailto:rfi@contesting.com>
Hi again, Doc.

No, I'd say it isn't.  I learned in the military that brushes in high speed
fans can fail after only a few days.   That's why computer and equipment
cooling fans don't use them.  And these guys have a two year warranty.

Some modern fans can generate EMI if the the motor driver or tach-output
oscillate at RF.   Soetimes leads provide a UHF "tank circuit" that helps
things along.


> [Original Message]
> From: kd4e <kd4e@verizon.net>
> It is reasonable to presume that a 12v fan not labeled
> "brushless" has brushes and is thus more likely to
> generate RFI?
> http://www.buyextras.com/bev12albalbe.html

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