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Author Topic: Fisher & Paykel refrigerator is RFI generator  (Read 446 times)

WD9ICU

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Fisher & Paykel refrigerator is RFI generator
« on: May 18, 2022, 12:17:03 PM »

Great fridge but horrible RFI is emitted. FYI
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W9IQ

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Re: Fisher & Paykel refrigerator is RFI generator
« Reply #1 on: May 18, 2022, 02:20:24 PM »

Great fridge but horrible RFI is emitted. FYI

Thanks for putting them on the wall of shame! Do you have a model number that you can add?

- Glenn W9IQ
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- Glenn W9IQ

God runs electromagnetics on Monday, Wednesday and Friday by the wave theory and the devil runs it on Tuesday, Thursday and Saturday by the Quantum theory.

K6AER

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Re: Fisher & Paykel refrigerator is RFI generator
« Reply #2 on: May 18, 2022, 03:53:44 PM »

As far as ham radio receivers go any microprocessor device will cause interference. HF radiation from any electronic device has to be below 50 mV in the HF spectrum at 100 yards away to a reference antenna. For the ham community,  that level will kill the hobby.

I don't buy anything without checking for interference.


More information here: https://www.fcc.gov/oet/ea/rfdevice
« Last Edit: May 18, 2022, 03:59:03 PM by K6AER »
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W9IQ

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Re: Fisher & Paykel refrigerator is RFI generator
« Reply #3 on: May 18, 2022, 04:34:44 PM »

As far as ham radio receivers go any microprocessor device will cause interference. HF radiation from any electronic device has to be below 50 mV in the HF spectrum at 100 yards away to a reference antenna. For the ham community,  that level will kill the hobby.

I don't buy anything without checking for interference.


More information here: https://www.fcc.gov/oet/ea/rfdevice

There is a general exemption for "white goods". However, the FCC has stated that features that are beyond the basic function of a "white good", such as an Internet touch screen, must meet classic class A or B computer requirements.

- Glenn W9IQ
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- Glenn W9IQ

God runs electromagnetics on Monday, Wednesday and Friday by the wave theory and the devil runs it on Tuesday, Thursday and Saturday by the Quantum theory.

K9RJ

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Re: Fisher & Paykel refrigerator is RFI generator
« Reply #4 on: May 18, 2022, 05:04:39 PM »

Is there a reliable website where we can find information on individual products?
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W9IQ

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Re: Fisher & Paykel refrigerator is RFI generator
« Reply #5 on: May 18, 2022, 05:12:06 PM »

Not that I have found. I am not certain there would be enough bandwidth/storage capacity to meet demand!

- Glenn W9IQ
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- Glenn W9IQ

God runs electromagnetics on Monday, Wednesday and Friday by the wave theory and the devil runs it on Tuesday, Thursday and Saturday by the Quantum theory.

WD9ICU

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Re: Fisher & Paykel refrigerator is RFI generator
« Reply #6 on: May 19, 2022, 08:18:27 AM »

Great fridge but horrible RFI is emitted. FYI
Model number is  RF201ADUSX5.
There are 4 other models listed on owners manual but I can not vouch for them.
RF135B. E522B. RF170W. RF170A.
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K7NI

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Re: Fisher & Paykel refrigerator is RFI generator
« Reply #7 on: May 19, 2022, 07:13:40 PM »

HF radiation from any electronic device has to be below 50 mV in the HF spectrum at 100 yards away to a reference antenna.


Can you provide a reference for this requirement?
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W9IQ

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Re: Fisher & Paykel refrigerator is RFI generator
« Reply #8 on: May 20, 2022, 06:01:05 AM »

HF radiation from any electronic device has to be below 50 mV in the HF spectrum at 100 yards away to a reference antenna.


Can you provide a reference for this requirement?

It is an aberrant reference.

Part 15 specifies radiated emissions for a given frequency range in the field strength form of μV/m at a specified distance. Specific emission limits are determined by the device classification but it is instructional to look at the field strength limits for the HF bands for an "intentional radiator" as defined in Part 15. From 1.705 MHz to 30 MHz, the field strength limit is 30 μv/m at a distance of 30 meters. On the 80 meter band, for example, this would be roughly the equivalent of an S9+15 dB signal with a 2.15 dBi gain receive antenna (free space dipole) placed at 30 meters.

As I mentioned earlier, all "white goods" of which the subject of this thread is classified, that use digital devices are generally excluded from Part 15 emission limitations. With the proliferation of VFDs, etc. this is an unfortunate exemption for the ham radio community. Some white goods, such as inductive cooking stoves and microwave ovens, are subject to Part 18 regulations.

It is also noteworthy that despite the general white goods exemption from emission limits, it does not mean that they are allowed to cause harmful interference. However, this generally shifts the burden of proof to the amateur and requires that the FCC gets involved. If the ham is the owner of the device, it is fait accompli.

- Glenn W9IQ
« Last Edit: May 20, 2022, 06:18:08 AM by W9IQ »
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- Glenn W9IQ

God runs electromagnetics on Monday, Wednesday and Friday by the wave theory and the devil runs it on Tuesday, Thursday and Saturday by the Quantum theory.

K7NI

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  • Posts: 84
Re: Fisher & Paykel refrigerator is RFI generator
« Reply #9 on: May 20, 2022, 12:29:23 PM »

HF radiation from any electronic device has to be below 50 mV in the HF spectrum at 100 yards away to a reference antenna.


Can you provide a reference for this requirement?

It is an aberrant reference.

Part 15 specifies radiated emissions for a given frequency range in the field strength form of μV/m at a specified distance. Specific emission limits are determined by the device classification but it is instructional to look at the field strength limits for the HF bands for an "intentional radiator" as defined in Part 15. From 1.705 MHz to 30 MHz, the field strength limit is 30 μv/m at a distance of 30 meters. On the 80 meter band, for example, this would be roughly the equivalent of an S9+15 dB signal with a 2.15 dBi gain receive antenna (free space dipole) placed at 30 meters.

As I mentioned earlier, all "white goods" of which the subject of this thread is classified, that use digital devices are generally excluded from Part 15 emission limitations. With the proliferation of VFDs, etc. this is an unfortunate exemption for the ham radio community. Some white goods, such as inductive cooking stoves and microwave ovens, are subject to Part 18 regulations.

It is also noteworthy that despite the general white goods exemption from emission limits, it does not mean that they are allowed to cause harmful interference. However, this generally shifts the burden of proof to the amateur and requires that the FCC gets involved. If the ham is the owner of the device, it is fait accompli.

- Glenn W9IQ

Yes, I work for an EMC test lab and have been involved with EMC, in one way or another, for 25 years and I have never seen a radiated emission limit in mV nor a test distance in yards, so I was curious.
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WB7HF

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Re: Fisher & Paykel refrigerator is RFI generator
« Reply #10 on: September 10, 2022, 05:20:17 PM »

Does installing any ferrite loops or beads help at all??
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