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Re: [RFI] Non-RF sensitive hardwired smoke/fire alarms?

To: RFI List <rfi@contesting.com>
Subject: Re: [RFI] Non-RF sensitive hardwired smoke/fire alarms?
From: w6rgs@cox.net
Date: Fri, 11 Jul 2014 09:52:25 -0700
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
Last year, we re-wired the entire house (power, phone, cable tv and data) and installed new Kidde KN-COSM18 hardwired detectors, including one in the shack. No issues, even when the SB-220 is used.
Bill W6RGS

At 08:25 PM 7/9/2014, Kelly Johnson wrote:
I would also be interested to hear about others' experience with hardwired
smoke/fire/CO2 detectors.  Building codes now require new construction to
have hardwired/interconnected smoke detectors.  I read lots of horror
stories about hardwired smoke detectors on the web.  All of the ionization
type smoke detectors and CO2 detectors in my house have no RFI/EMI
problems, but both of the photoelectric fire detectors chirp when I run
QRO.  I have to pull out the battery when I run QRO.  That wouldn't be so
easy with a hardwired detector, so I'd like to know how to avoid problems.
Will ferrite beads on the leads be sufficient?  Are there brands that are
known to be less problematic?

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