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Re: [RFI] Trying to locate the Part 15 compliance note...

To: dave@nk7z.net
Subject: Re: [RFI] Trying to locate the Part 15 compliance note...
From: "Dave Cole (NK7Z)" <dave@nk7z.net>
Date: Thu, 14 Mar 2019 08:30:40 -0700
List-post: <mailto:rfi@contesting.com>
Hi Ed,

Many thanks to the ARRL for the assistance in this! Also, thanks for the link, and thanks to the ARRL for archiving that book as well!!

I am aware that pert 15 applies to equipment transmitting RFI, what I am looking for the statement to the effect that a device must accept interference from all licensed transmitters, which I think used to be on the Part 15 statements.

I was hoping that the stove, having a computer in it, might have that sort of label on it, containing the statement covering acceptance of RF interference.

Is there any sort of statement by the FCC anywhere that indicates a device must accept all interference from licensed transmitters, that might be applicable to kitchen utilities? That would end my issues instantly.

In looking at the handout linked in your email, adding a low pass filter to the stove might prove difficult, unless we consider ferrite material a low pass filter. :)

Did you get the model number I sent of the stove? Also please note the complainant stated that GE has an RFI kit for the 110V volt version of the stove, but not the 220V version of this device...

Again, many thanks to you and the ARRL for the assistance here Ed. This will help in getting prepared for the meeting with the vendor, and the owners of the stove.

Having the vendor state that a close by ham may be causing the problem has biased the owners completely, so education is in order, but that is difficult in this sort of situation.

I have sent my KPA500 to Elecraft to get a compliance check in preparation for a meeting with the vendor, and the owners of the affected stove.

I am considering asking the vendor to pay for this once the amp is proven good... But that will happen after the RFI issue is solved.

73s and thanks,
Dave (NK7Z)
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon

On 3/13/19 1:21 PM, Hare, Ed  W1RFI wrote:
Those regulations all apply to emissions from the device. In the US, with very 
few exceptions, there are no FCC rules regarding immunity.

This now-out-of-print-but-wisely-archived FCC document may help:


See the CIB Interference Handbook and look for the statement about non-radio 
devices improperly functioning as radio receivers.


-----Original Message-----
From: RFI <rfi-bounces@contesting.com> On Behalf Of David Eckhardt
Sent: Friday, February 22, 2019 2:41 PM
To: Dave Cole (NK7Z) <dave@nk7z.net>
Cc: Rfi List <rfi@contesting.com>
Subject: Re: [RFI] Trying to locate the Part 15 compliance note...

There likely wo't be a statement.  Home appliances are specifically exempt from 
FCC rules of any kind.  15.103(d) will be difficult to force into this case 
where it arcs when an amateur transmits.

§ 15.103 Exempted devices.

The following devices are subject only to the general conditions of operation 
in §§ 15.5 <https://www.law.cornell.edu/cfr/text/47/15.5> and 15.29 and are exempt from the specific 
technical standards and other requirements contained in this part. The operator of the exempted device shall be required 
to stop operating the device upon a finding by the Commission or its representative that the device is causing harmful 
shall not resume until the condition causing the harmful interference 
has been corrected. Although not mandatory, it is strongly recommended that the 
manufacturer of an exempted device endeavor to have the device meet the 
specific technical standards in this part.

(a) A digital device
utilized exclusively in any transportation vehicle including motor vehicles and 

(b) A digital device
used exclusively as an electronic control or power system utilized by a public 
utility or in an industrial plant. The term public utility includes equipment 
only to the extent that it is in a dedicated building or large room owned or 
leased by the utility and does not extend to equipment installed in a 
subscriber's facility.

(c) A digital device
used exclusively as industrial, commercial, or medical test equipment 

(d) A digital device
utilized exclusively in an appliance, e.g., microwave oven, dishwasher, clothes 
dryer, air conditioner (central or window), etc.

(e) Specialized medical digital devices
(generally used at the direction of or under the supervision of a licensed health care practitioner) 
whether used in a patient's home or a health care facility. Non-specialized medical devices, i.e., 
devices marketed through retail channels for use by the general public, are not exempted. This exemption 
also does not apply to digital devices 
used for record keeping or any purpose not directly connected with medical 

(f)Digital devices
that have a power consumption not exceeding 6 nW.

(g) Joystick controllers or similar devices, such as a mouse, used with digital devices 
but which contain only non-digital circuitry or a simple circuit to convert the 
signal to the format required (e.g., an integrated circuit for analog to 
digital conversion) are viewed as passive add-on devices, not themselves 
directly subject to the technical standards or the equipment authorization 

(h)Digital devices
in which both the highest frequency generated and the highest frequency used are less than 1.705 MHz and 
which do not operate from the AC power lines or contain provisions for operation 
while connected to the AC power lines. Digital devices 
that include, or make provision for the use of, battery eliminators, AC adaptors or battery chargers 
which permit operation 
while charging or that connect to the AC power lines indirectly, obtaining 
their power through another device which is connected to the AC power lines, do 
not fall under this exemption.

(i) Responsible parties should note that equipment containing more than one 
device is not exempt from the technical standards in this part unless all of 
the devices in the equipment meet the criteria for exemption. If only one of 
the included devices qualifies for exemption, the remainder of the equipment 
must comply with any applicable regulations. If a device performs more than one 
function and all of those functions do not meet the criteria for exemption, the 
device does not qualify for inclusion under the exemptions.

On Fri, Feb 22, 2019 at 3:32 AM Dave Cole (NK7Z) <dave@nk7z.net> wrote:


I have an interesting RFI issue happening.  My neighbors oven is
acting up when I transmit.  It looks like the oven is taking RF in via
the power lines.  In our discussions, part 15 compliance came up.  I
have offered to have an electrician install some ferrite material on
the power lines, and pay for it, but they want to pursue with GE as
they indicated they may get a replacement stove...  Anyway...

I have the model number for the stove, it is a GE Signature Cafe model
number C2S985SET9SS.

After downloading the manual, the installation information, and the
users guide, I can not locate a Part 15 compliance note anywhere...
Can someone help my locate this?

73s and thanks,
Dave (NK7Z)
Award Manager, 30MDG Grid Awards
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
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