Can I ask why only 80-10? 160 is a nice band??
Thanks
> On Jul 27, 2015, at 12:55 PM, David Cole <dave@nk7z.net> wrote:
>
> Hi Ed,
>
> I discovered that the City here is going to be switching to LED
> streetlights soon, and ended up in contact with the City Engineer...
>
> The long and short of it is that the city had not even thought about
> Part 15/18 compliance, but when they looked, the lights were compliant
> as per the data sheet on them.
>
> He and agreed to have us look over the test run they have in place
> looking for RFI... He gave us the addresses and we we did-- all of them
> were dead quiet on 80-10 Meters, regarding broadband noise, in a drive
> around test...
>
> We did a prelight drive around, mapping all the poles by number and
> taking RF background readings, on 80-10, then waited for them to light,
> and did it again... Not one light made any detectable RFI, at street
> level. Not scientific, and I told him that, but at least the city is
> being really good about RFI, and it is now on their radar.
>
>
> --
> Thanks and 73's,
> For equipment, and software setups and reviews see:
> www.nk7z.net
>
> For MixW support see;
> http://groups.yahoo.com/neo/groups/mixw/info
> For Dopplergram information see:
> http://groups.yahoo.com/neo/groups/dopplergram/info
> For MM-SSTV see:
> http://groups.yahoo.com/neo/groups/MM-SSTV/info
>
>
> On Mon, 2015-07-27 at 15:04 +0000, Hare, Ed W1RFI 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
>> 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
>> 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
>> 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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