Hmmm, I can't make much of this diagram and the group has decided to
use passive aggressive behavior to "teach you"... You are asking for
help and getting didactics thrown in your face... Shame on them!

I doubt you can feed this antenna on 40 with coax... You will need to
either put a tuner at the feed point, or resort to open wire line and
a tuner at the radio...

My first impulse would be to turn this into a top loaded vertical with
an elevated counterpoise, the vertical self resonant on 40 and loaded
for 80...
Feed it at the bottom of the vertical section with the braid going to
the 17 foot horizontals (some tuning needed)... Use a loading coil
about half way up the vertical for 80 and short it out for 40... The
counterpoise (the 17 foot horizontals as best I can make out) would be
coil loaded at at the center connection of the 2 "radials" so they
are resonant on 80 with a shroting clip for 40... A relay will select
for you, or you can walk out and manually move the clips...

Go to the library there and get an interloan copy of Moxon's "HF
Antennas for all locations"... He has an excellent discussion of
loaded radials/counterpoises, etc... With his help you should see how
to make your antenna play... Any problems drop me an email through
and I will give you a fax number where you can shoot me
a diagram of your antenna and we can discuss it...

cheers ... denny / k8do