Dan Zimmerman N3OX wrote:
>I'd like to make some field strength measurements while I'm working on
>it; I'm not worried about absolute measurements; I just want to make
>some relative ones.
>
>
>My gut feeling is that 5 wavelengths is sufficient for good relative
>comparisons. I doubt I can get further away. Closer would be more
>convenient for me. How far away is far enough?
>
>
>
Dan,
If you use the distance of one mile to make your FSM you can tap into
the wealth of FCC (www.fcc.gov) and other enginneering data that use
measurements at one mile with 1KW into a vertical. If you can borrow a
professional field strength meter from a BC station engineer you can get
the microvolts per meter and compare your results imperically to a known
standard. You will be surprised how little it takes to approach the
ideal values, depending of course on the soil conductivity and number of
radials you can run out.
Herb Schoenbohm, KV4FZ
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