"Fred W4JLE" wrote
Reg;
How many radials are required in GB for a commercial broadcast
station ?


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Fred,
Depends on how long and thick they are. But in general, just
sufficient to meet overall technical and economic requirements with
one or two more for luck.

Design engineers, just to be awkward, are inclined to deliberately
avoid 120. Then they can sit back and have a good laugh when it still
works.
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Reg, G4FGQ