Re: RF Exposure Evaluation

Johnny AC0BQ

That should have been 13.5 feet.

On Mon, Sep 13, 2021 at 5:47 PM Johnny AC0BQ via <> wrote:
Thank Jim
That’s interesting.
I guess I should run one for 100 watts and another for 5, all CW.

So, if I read your chart correctly, the 100% 24/7 calculation, you would need to be 12 feet or so from your dipole, is this correct?
Johnny ACØBQ 

On Mon, Sep 13, 2021 at 3:08 PM Jim, N5IB <n5ib@...> wrote:
Had some "nothing to do" time today so decided to spend a few quality minutes performing my "due diligence" with the ARRL's RF Exposure Caculator at

I ran four cases, for all bands from 160m to 6m, making the most conservative of assumptions - zero feedline loss, theoretical dipole gain of 2.14 dBi, calculating with ground reflections, and rounding all distances (for the uncontrolled environment up to the nearest tenth of a foot

Case 1:  100 W out, "brick on the IC-706 key" that is 100% Tx, 24/7
Case 2   100 W out, normal CW , that is 40% Tx  duty,  2 min Tx then 2 min Rx
Case 3:  15 W out,  "brick on the K2 key", that is 100% Tx, 24/7
Case 4:   a Bayou Jumper doing normal Secret Agent stuff

The results are shown on the attached graph.

Jim, N5IB

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Check out the 4SQRP website at

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