New Amateur RF Exposure Evaluation Requirements ?

Discussion in 'Ham Radio Discussions' started by NN4RH, Nov 18, 2019.

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  1. NN4RH

    NN4RH Premium Subscriber QRZ Page

    I found this in the October ARRL Executive Committee Meeting minutes:

    The current regulation is the one that sets a power threshold for all bands, below which the "RF environmental evaluation" prescribed by the FCC is not required.

    (Of course, I am sure we've all faithfully been doing the required RF exposure evaluations when we use 100 watts on 10 meters ...)

    There is no specific reporting requirement, but technically this requires us to do actual RF exposure evaluations even for QRP power.

    OET 65 Supplement B does not appear to have changed.
  2. W4NNF

    W4NNF XML Subscriber QRZ Page

    And if you don't, the FCC will surely come after you. Just like they've done to clean up 7.200 and 14.313. ;)
    PU2OZT, K4KYV, NE3Z and 2 others like this.
  3. WZ7U

    WZ7U Ham Member QRZ Page

  4. KD4IEM

    KD4IEM Premium Subscriber QRZ Page

    Your output should not be 100 watts on 10m if you account for the duty factor for the mode. That will usually put a 100w station in compliance. 6 meters on the other hand is questionable. You can be running enough power on that band to be out of compliance.
    Last edited: Nov 18, 2019
    PU2OZT likes this.
  5. KK5JY

    KK5JY Ham Member QRZ Page

    There's no reason why we can't all do MPE compliance evaluations. There are numerous antenna examples in the FCC documents, and there are a number of calculators floating around on the web that use the FCC's formulae to compute compliance numbers. Compliance evaluation of a new antenna/amplifier installation means clicking a few buttons. If one is super-extra-extremely cautious, they can also print the results. :D

    Bring it, I say. :)
    PU2OZT, NL7W, K0UO and 1 other person like this.
  6. W2JKT

    W2JKT Ham Member QRZ Page

    50W input to a dipole on 6m needs only about 3 meters to comply with uncontrolled exposure. How is that questionable?
    VK6APZ likes this.
  7. KD4IEM

    KD4IEM Premium Subscriber QRZ Page

    And here is a link to one if anyone wants it... .
    KK5JY likes this.
  8. KD4IEM

    KD4IEM Premium Subscriber QRZ Page

    Could be if you are close enough to the antenna. Some people have 6m antenna's in their shack, or on a balcony...
  9. NE4EB

    NE4EB XML Subscriber QRZ Page

    This might cause problems with some public safety installations. One that comes to mind is the occupant in the back seat of a police car. Having your head three feet away from a 5/8th wave antenna swallowing 125 watts on 450 Mhz.
    VK6APZ and WQ4G like this.
  10. W2JKT

    W2JKT Ham Member QRZ Page

    Controlled access is 4.3 feet for the same situation.

    So, within the controlled access area (balcony, inside the dwelling) the antenna has to be 4.3 feet from people not to violate, and 3 meters from people in any uncontrolled area around the antenna (like outside the building in a public place).

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