Ed,
Good that you are picking your fights! If you hit every item that was
jut above limits, the FCC would soon stop listening!
--
Thanks and 73's,
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On Mon, 2015-07-27 at 15:25 +0000, Hare, Ed W1RFI wrote:
> Actually, we don't. We have the screen room to do receiver and transmitter
> testing, and a room set up in compliance with ANSI C63.4 to do
> conducted-emission measurements, but not an anechoic chamber. Outdoor testing
> should suffice, being a good approximation to a calibrated open-area test
> site. If we find devices a few dB above the limits, we don't file
> complaints, but the things we have found to be bad have been WAY above the
> limits, so close enough is close enough.
>
>
> Ed Hare, W1RFI
> ARRL Laboratory Manager
> 225 Main St.
> Newington, CT 06111
> Tel: (860) 594-0318
> Fax: (860) 594-0259
> Email: W1RFI@arrl.org
> Member: IEEE Connecticut Section
> Member: IEEE EMC Society, Board of Directors
> Member: IEEE EMC Society Standards Development and Education Committee
> Primary representative: ANSI ASC C63 EMC Committee, Vice Chair Subcommittee
> 5 (Immunity)
> Member: QRP Amateur Radio Club International, Board of Directors
>
>
>
> From: David Robbins [mailto:k1ttt@verizon.net]
> Sent: Monday, July 27, 2015 11:19 AM
> To: Hare, Ed W1RFI
> Cc: rfi@contesting.com
> Subject: Re: Re: [RFI] LED lighting
>
> what? you don't have an anechoic shielded chamber to do that kind of stuff???
>
>
> Jul 27, 2015 11:05:16 AM, w1rfi@arrl.org<mailto:w1rfi@arrl.org> wrote:
> I bought one multi-LED bulb that came from China. It was dead quiet. My guess
> is that it simply put the LEDs in series and connected them to the line. Not
> all of them will have a switcher in them.
>
> ARRL tested a number and found them to be below the conducted emissions
> limits. I want to test them above 30 MHz too, for radiated emissions, though
> we'd need to set up outdoors to prevent scatters from throwing off the
> readings.
>
>
> Ed Hare, W1RFI
> ARRL Laboratory Manager
> 225 Main St.
> Newington, CT 06111
> Tel: (860) 594-0318
> Fax: (860) 594-0259
> Email: W1RFI@arrl.org<mailto:W1RFI@arrl.org>
> Member: IEEE Connecticut Section
> Member: IEEE EMC Society, Board of Directors
> Member: IEEE EMC Society Standards Development and Education Committee
> Primary representative: ANSI ASC C63 EMC Committee, Vice Chair Subcommittee 5
> (Immunity)
> Member: QRP Amateur Radio Club International, Board of Directors
>
>
>
> -----Original Message-----
> From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of David Robbins
> Sent: Sunday, July 26, 2015 11:37 AM
> To: 'Phil Snyder'; rfi@contesting.com<mailto:rfi@contesting.com>
> Subject: Re: [RFI] LED lighting
>
> They could just be led bulbs in a standard 120v socket also... in those there
> is a switching supply in the base of each bulb.
>
> David Robbins K1TTT
> e-mail: mailto:k1ttt@arrl.net
> web: http://wiki.k1ttt.net
> AR-Cluster node: 145.69MHz or telnet://k1ttt.net
>
>
> -----Original Message-----
> From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of Phil Snyder
> Sent: Sunday, July 26, 2015 14:51
> To: rfi@contesting.com<mailto:rfi@contesting.com>
> Subject: [RFI] LED lighting
>
> Well after a 4 year period the local electric company found the offending
> lightning arrester and voila no more noise! Unfortunately, the neighbor
> behind me just remodeled the outside of their house and in the process added
> about 6 LED lighting fixtures in the soffit across the front and after a few
> days of watching and listening it appears that they are causing way more RFI
> then the faulty arrester ever did.
>
> I am hoping to learn a little more here before approaching them to make sure
> all my facts are straight. I am assuming that there is a switching power
> supply running the lights and that the power is cut to the supply when they
> are not on since the noise is gone when they are off. Is it possible to try
> and suppress the noise on the leads coming out of the power supply? Does he
> need to contact the manufacturer to replace the supply? Unfortunately they
> are mounted into the soffit like a can type light you would have inside your
> house and I hope the power supply is accessible.
>
> Thanks
> Phil
> N9LAH
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