You might have a look at,

MailfrmPA wrote:
What book/mag article would you recommend as the best "how to " source of info
on rhombics for the low bands? The comming cold dark nights put me in a mind
for dreaming of big antennas. For bedtime reading I don't want a lot of
formulas, just nuts and bolts info

K0MB

"Antenna Engineering Handbook", by Hery Jasik - starting at 4.12 - The
topic 4.6 ' Rhombic Antenna in Free Space and go from there in that book.

W5WQN

Mike Luther