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Re: [RFI] Fwd: Undelivered Mail Returned to Sender

To: rfi@contesting.com
Subject: Re: [RFI] Fwd: Undelivered Mail Returned to Sender
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Tue, 30 Apr 2019 20:46:50 -0700
List-post: <mailto:rfi@contesting.com>
On 4/30/2019 4:38 PM, Paul wrote:
I might call on the RFI audience to share their experience with regular electric motors 
versus the newer DC motors.  I am drawn to the energy efficiency of the latter but fear the 
control electronics may be RFI noisy as are our baneful “wall worts”.

So, anyone have an opinion ?

Not an opinion -- they have no place in scientific discussions. :)

It is a FACT that the the electronic controllers for most variable speed motors are quite noisy, for the same reason that the switch-mode power supplies in today's wall warts are noisy -- poor design and construction that fails to prevent radiation and conduction of RF noise. In other words, best to avoid them.

73, Jim K9YC

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