"DMD" wrote
Go there and you'll found the "real" of explanation about this antenna
model.
www.kg4jjh.com/sigma.html
DMB
Thank you for the references. Not good. I didn't realize that the feedpoint
contains a 50 ohm resistor ( 40m EZNEC model on KG4JJH's web site cited
above).
Thanks again,
Al W6LX