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FCC Orders a Brooklyn Man To Turn Off His Bitcoin Miner Because It Was Interfering With T-Mobile's Wireless Network (arstechnica.com)

A New York City resident was ordered to turn off his bitcoin miner after the Federal Communications Commission discovered that it was interfering with T-Mobile's wireless network. From a report: After receiving a complaint from T-Mobile about interference to its 700MHz LTE network in Brooklyn, New York, FCC agents in November 2017 determined that radio emissions in the 700MHz band were coming from the residence of a man named Victor Rosario. "When the interfering device was turned off the interference ceased," the FCC's enforcement bureau told Rosario in a "Notification of Harmful Interference" yesterday. "You identified the device as an Antminer S5 Bitcoin Miner. The device was generating spurious emissions on frequencies assigned to T-Mobile's broadband network and causing harmful interference." The FCC told Rosario that continued interference with T-Mobile's network while operating the device would be a violation of federal laws "and could subject the operator to severe penalties, including, but not limited to, substantial monetary fines, in rem arrest action to seize the offending radio equipment, and criminal sanctions including imprisonment."

20 of 207 comments (clear)

  1. No FCC ID by The+Raven · · Score: 3, Insightful

    How much you want to bet that the Antminer S5 has no FCC ID, because they never bothered to get one.

    He could turn it back on, he just needs to put his miner inside a faraday cage of some kind.

    --
    "I will trust Google to 'do no evil' until the founders no longer run it." Hello Alphabet.
    1. Re:No FCC ID by BenFranske · · Score: 4, Informative

      Pretty much all commercially sold electronic equipment needs to be FCC certified for sale in the US specifically because they can cause interference like this. See https://www.fcc.gov/oet/ea/rfd... specifically the sections on unintentional and incidental radiators.

  2. Meh. by The+Grim+Reefer · · Score: 4, Informative

    The letter states he can operate it if he fixes the interference. TFS makes it sound like the FCC won't let him mine bitcoin at all.

    1. Re:Meh. by DontBeAMoran · · Score: 4, Funny

      But what if he wants to call his Faraday cage something else than "a day"?

      --
      #DeleteFacebook
    2. Re:Meh. by SuricouRaven · · Score: 5, Informative

      Faraday cages aren't magic interference stoppers. The emission here was most likely via the power supply cables (or, less likely, data), and those would have to pass through the cage.

      Here's how you fix it:
      1. Read an article on noise surpression, choke design, capacitive coupling in inductors, choke self-resonance and core material selection.
      2. Go ask your nearest ham to build you a noise filter.

  3. Re:Mr. Tinfoil by Sarten-X · · Score: 5, Funny

    If the miner had its own tinfoil hat, there wouldn't have been any interference!

    --
    You do not have a moral or legal right to do absolutely anything you want.
  4. Waste of energy by TJHook3r · · Score: 5, Funny

    Disrupting emergency services, helping global warming, distributing child porn... Is there anything Bitcoin CAN'T do?

    1. Re:Waste of energy by Aaden42 · · Score: 5, Funny

      Yes. Hold a steady valuation for five minutes.

    2. Re:Waste of energy by gman003 · · Score: 5, Insightful

      Function as a useful currency?

  5. 700MHz... by b0s0z0ku · · Score: 3, Insightful

    700 MHz is in the 10s of cm range as far as wavelength. Should be easy to construct some kind of Faraday cage to block the interference (while still allowing for air cooling), with filters on the AC line and Ethernet to prevent them from radiating as antennas.

    1. Re:700MHz... by HornWumpus · · Score: 3, Interesting

      Plates? Please don't comment about things you don't understand. Openings have to be smaller than the wavelength of the noise being addressed. At 700 MHz easy. Wrap it in chicken wire, solder the edges, ground it, done. Doesn't have to be perfect.

      This isn't antenna design. Anybody who flunked basic physics can build a faraday cage.

      Shoplifters have had this down for years.

      Wires, especially bundled with grounds, longer than a few wavelengths (power cords) or made up of twisted pairs (ethernet cables) make very shitty antennas.

      --
      John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
  6. Re:Mr. Tinfoil by sinij · · Score: 3, Informative

    If the miner had its own tinfoil hat, there wouldn't have been any interference!

    Only if it was grounded.

  7. Re:Fear uncle Charlie by rahvin112 · · Score: 5, Insightful

    Harshly worded letter? They'll fine him $10,000 and then seize the equipment and destroy it. Don't mess with the FCC where interference is concerned, he's lucky they gave him a warning instead of just outright fining him because they could have just hit him with the $10k fine and seized the equipment on the first contact.

  8. Re:Why by BenFranske · · Score: 4, Informative

    Pretty much anything electronic can create RF emissions. See unintentional and incidental radiators at https://www.fcc.gov/oet/ea/rfd...

  9. Re:Mr. Tinfoil by SuricouRaven · · Score: 4, Interesting

    What you want here isn't just a shield, it's a choke - the emission was probably via the power supply cable.

  10. Re:Fear uncle Charlie by rahvin112 · · Score: 5, Informative

    All the devices you list are part 15, they are required to accept all interference and that guy on the CB is protected unless you can show he's interfering with protected services. That 700mhz band in the story, it's a protected band and subject to the interference rules.

  11. Re:Fear uncle Charlie by Mysticalfruit · · Score: 5, Interesting

    You misunderstand the actual power of the FCC. Their threats are NOT empty. They have the power to levy fines, have right of entry powers, etc. They don't give a fly fuck about two CB channels cross talking... but fuck with spectrum that's being used by a commercial or governmental entity and they'll drop a fucking hammer on your head.

    I was once involved with a college radio station and due to an equipment malfunction (our attenuator failed) we were accidentally transmitting at a much higher power than we should have... the FCC showed up at a campus, exercised their right of entry, disconnected our receiver and then changed the locks. Needless to say, it was a fluckercluck.

    --
    Yes Francis, the world has gone crazy.
  12. Re:Mr. Tinfoil by Hetero · · Score: 3, Insightful

    Unfortunately, you will probably be modded down as troll or something while "sinij" is modded from +4 to +5 on his wrong answer. CORRECT on your part. Conducted emissions are always half the battle and generally easy to handle with EMI suppressors.

  13. Re:Fear uncle Charlie by bws111 · · Score: 5, Insightful

    It depends. If the transmitter is actually radiating on the TV channels frequency, then yes, the transmitter can be fined. However, if the problem is that his TV, telephone, and everything else are picking up legally transmitted signals then it is HIS problem.

  14. Re:Fear uncle Charlie by mysidia · · Score: 5, Interesting

    I used to be able to hear my neighbors shitty CB radio plus linear through my landline, TV, radio and microwave oven.

    The FCC has very limited resources to investigate interference complaints, so RESIDENTIAL users generally go by the wayside.
    Until they start interfering with a commercial radio service or public safety, at which point the FCC prioritizes a reponse --- i've heard the people who work for that agency say they try to have all complaints from businesses addressed within 10 days or less, and for public safety the time frame is 24 hours.

    So if someone's pumping out CB with an Illegal 1Kilowatt amplifier; pinning the coax doesn't sound too unreasonable -- CB users are not legally to be using ANY kind of amplifiers anyways - the FCC generally just isn't there to quickly solve your personal RF woes caused by a neighbor anymore, unless they're making trouble for many people...

    Unless you have a HAM licence to protect you can, more or less, ignore them.

    Um... your license, If you have one, isn't even at risk, unless you have a bad history or refuse to cooperate with them and
    allow station inspections or were being ridiculously negligent or doing deliberately doing something very bad like out-of-band
    emissions, emitting an excessive wattage at ground levels, or failing to suppress harmonics...

    Most cases of "interference" are just people using cheap electronics, TVs, Phones, etc which are inadequately shielded ---
    in this case, the legal responsibility is for the people suffering interference to buy equipment of good design, instead.