Richard Clark, KB7QHC wrote:
"Faithfully" except for an inadvertent substitution of decade miles for
decade kilometers distance."

Thank you Richard for such a kind word as "inadvertent".

I make mistakes and I apologize for them. Hopefully, none of consequence
go uncorrected and mislead anyone. I learn more from my mistakes than
from correct postings but it isn`t my favorite way to learn. Thank you
to everyone who prompts me to search for the answer to an interesting
question.

I`m still puzzled about "cluster antennas".

Best regards, Richard Harrison, KB5WZI