[RFI] The FCC's Class B Standards
Dave Cole (NK7Z)
dave at nk7z.net
Wed Mar 21 14:32:57 EDT 2018
One thing that both amazed and frightened me was when the ARRL provided
the FCC an airtight case regarding Home Depot, (I believe), selling Part
18 compliant lights to home users, and nothing happened...
That to me is scary as hell with regards to the future of enforcement...
73s and thanks,
Dave
NK7Z
https://www.nk7z.net
On 03/21/2018 08:32 AM, David Eckhardt wrote:
> FCC no longer has the resources or drive tigntning or even enforce the
> present rules. OET has been gutted. FCC is nothing but a bunch of
> paper pushers and lawyers at this point. Don't you wish we could
> designate our tax monies to specific purposes? I'd certainly volunteer
> what I pay to bolster OET! Ever since Cangress slapped their hands for
> dragging their feet on making widely available Internet, its been a
> downhill slide. Then ARRL took them to court over the bogus BPL
> measurements they made.
>
> Dave - WØLEV
>
> On Wed, Mar 21, 2018 at 6:54 AM, Dave Cole (NK7Z) <dave at nk7z.net
> <mailto:dave at nk7z.net>> wrote:
>
> I don't know why, but that bothers me, and it seems like a lessening
> of the rules, as opposed to what I think should be a tightening of
> the rules...
>
> 73s and thanks,
> Dave
> NK7Z
> https://www.nk7z.net
>
> On 03/20/2018 07:45 PM, David Eckhardt wrote:
>
> Yep. Correct. Only in the User's Manual.
>
> On Wed, Mar 21, 2018 at 1:10 AM, Dave Cole (NK7Z) <dave at nk7z.net
> <mailto:dave at nk7z.net> <mailto:dave at nk7z.net
> <mailto:dave at nk7z.net>>> wrote:
>
> Thanks for the info Dave... I saw, or heard someplace that
> the FCC
> no longer requires a mark on the device, but just in the
> book... Have you heard anything about this? I can't
> remember where I heard it.
>
> 73s and thanks,
> Dave
> NK7Z
> https://www.nk7z.net
>
> On 03/20/2018 01:25 PM, David Eckhardt wrote:
>
> Only the FCC logo is REQUIRED to be on the device if it
> is Class
> B, home
> and small office. The statement and other regulatory
> information, more
> times than not, is contained in the 'User's Manual'.
> Most have a
> regulatory section devoted to this kind of stuff. If
> there is
> no FCC logo
> on the product, assume it is either Class A
> (Industrial) or the
> supplier
> doesn't know much about the regulatory world and required
> markings (no
> attehtion to EMC/RFI). This is based on some 30 years
> of doing
> EMC/RFI for
> a living. What I write is from experience. When we
> had a real
> FCC, things
> were very different!!!!
>
> If it is from China or the PacRim, just assume it has
> not been
> tested nor
> any attention paid to EMC/RFI. I have read
> many,.....many,.....bogus
> 'reports' on Chinese products, many of which are
> assembled from
> other
> products and piece mealed from other reports and really
> don't
> even apply.
> I've also experiencef many, . . . . many, . . . . .
> instances
> of false
> labeling from China.
>
> Bottom line: 1) When you shop for something, take a
> battery
> operated
> radio with you and request a test of the item.
> 2) It's hard to find otherwise,
> but don't
> buy if the
> electronics or products are 'Made in China".
> 3) Don't buy if in the
> inttruction manual
> or posted on
> the product, "Made of Foreign and Domestic Parts".
> That's a
> license for Chinese switchers
> with,
> again, no
> attentioin paid to EMC/RFI.
>
> However, the biggies like Apple and the like know the
> game and
> are usually
> to be trusted (except for their wall warts).
>
> I realize all this reads rather negative, but its
> reality these
> days! Just
> believe me ! ! !
>
> Dave - WØLEV
>
> On Tue, Mar 20, 2018 at 7:40 PM, Leonard Halvorsen
> <lhalvors at pppl.gov <mailto:lhalvors at pppl.gov>
> <mailto:lhalvors at pppl.gov <mailto:lhalvors at pppl.gov>>>
> wrote:
>
> Has everyone come to the same conclusion...
> "*...**IF* you can find them." ???
>
> [RFI] LED Bulb noise Eleta E12
>
> I read a while ago that to avoid, or at least
> mitigate to
> great extent,
> interference, an RF noise source must meet FCC
> standards for
> a "Class B"
> device. What I read stated it was defined in Part
> 17 (it
> seems to be Part
> 15 instead; possibly a typo) of the FCC rules, but
> I found
> many references
> to it in this *official* 120-page pdf document
>
> <https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=
> <https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=>
>
> <https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=
> <https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=>>
>
> 0ahUKEwjgprG4lLPZAhVHulMKHQF5AQQQFggoMAA&url=https%3A%2F%
> 2Fwww.gpo.gov <http://2Fwww.gpo.gov>
>
> <http://2Fwww.gpo.gov>%2Ffdsys%2Fpkg%2FCFR-2009-title47-vol1%2Fpdf%
>
> 2FCFR-2009-title47-vol1-part15.pdf&usg=AOvVaw1Op9mrNNvD_YdVp_5mAmKU>.
> This passage on page 23 states what manufacturers
> must put
> on such
> devices..
>
> (b) For a Class B digital device or peripheral,
> the instructions furnished the
> user shall include the following or
> similar statement, placed in a prominent
> location in the text of the manual:
>
> NOTE: This equipment has been tested and
> found to comply with the limits for a Class
> B digital device, pursuant to part 15 of the
> FCC Rules. These limits are designed to provide
> reasonable protection against harmful
> interference in a residential installation.
> This equipment generates, uses and can radiate
> radio frequency energy and, if not installed
> and used in accordance with the instructions,
> may cause harmful interference
> to radio communications. However, there is
> no guarantee that interference will not occur
> in a particular installation. If this equipment
> does cause harmful interference to
> radio or television reception, which can be
> determined by turning the equipment off and
> on, the user is encouraged to try to correct
> the interference by one or more of the following
> measures:
> —Reorient or relocate the receiving antenna.
> —Increase the separation between the equipment
> and receiver.
> —Connect the equipment into an outlet on a
> circuit different from that to which the receiver
> is connected.
> —Consult the dealer or an experienced radio/
> TV technician for help.
>
> I tried to locate devices that adhered to this at
> places
> like Home Depot
> and Lowes, but was unsuccessful.
>
> This 7-page pdf document
>
> <https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=
> <https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=>
>
> <https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=
> <https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=>>
>
> 0ahUKEwjSsf7jl7PZAhWStlkKHQtWCB0QFggyMAA&url=https%3A%2F%
> 2Fwww.cableorganizer.com <http://2Fwww.cableorganizer.com>
> <http://2Fwww.cableorganizer.com
> <http://2Fwww.cableorganizer.com>>%2Fimages%2Fkensington%
>
> 2Fmicrosaver-alarm-lock%2FFCC-rules.pdf&usg=AOvVaw2kXOZ71VpqTqByfN3bb6HO>
> attempts to abbreviate and interpret the
> legalese above.
> In it is this
> passage on page two...
>
> Two levels of radiation and conducted emissions
> limits for
> unintentional
> radiators are specified in FCC Part 15 Subpart B.
>
> The two levels are Class A digital devices, the
> higher less
> strict limits,
> and Class B digital devices, the lower more strict
> limits.
>
> Manufacturers are encouraged to meet the Class B
> digital
> device limits.
>
>
>
> So, *the key* seems to be to find devices that meet
> "Class
> B" standards ...
> *IF* you can find them.
> If they are made someplace in the Far East, that is
> probably impossible.
> Compliance costs are probably too high, and most people
> probably don't
> care.
> And if you can find them, they are probably expensive.
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>
> --
> *Dave - WØLEV
> *
> */Just Let Darwin Work/*
>
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> --
> *Dave - WØLEV
> *
> */Just Let Darwin Work/*
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