btippett at alum.mit.edu
Wed Jun 9 12:30:37 EDT 2004
>And once again, the question of 30x 1/4 vs 60x 1/8 wavelength radials
remains unanswered. (for 160 meters I believe...de W4ZV)
And the answer is:
30 * 0.25 * 538' = ~4000' of wire
Looking at Figure 3 on page 3 here:
the optimum number of radials for ~4000' of
total wire is 30-40 assuming average soil.
Therefore the answer to your question is:
30 1/4 radials has about 0.2 dB less loss than
60 1/8 radials. Will you ever notice the
difference? I doubt it.
There is also a simple guideline in ON4UN's
book which says there is no need for any space
between radials to be closer than ~0.015 wavelengths.
This is all covered in great detail in Chapter 9
of the most recent Low Band DX-ing.
73, Bill W4ZV
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