The Lindenblad has an overhead null that you might find anoying for some
high elevation passes of LEOs.
Are you open to trying to build a DCA (which is an antenna that I
developed)? I make the claim that there is no other hemispheric coverage
antenna design that performs better than a DCA. But, I sure am open to
being corrected.
The Feb 2008 QST contains an article on the DCA antenna design concept.
It is my claim that a DCA is extreemely forgiving of construction errors
and uses 4 wire dipoles and 50 ohm coax with 5 RFI type ferrites as
"baluns'.

Jerry KD6JDJ
Given the fact I don't subscribe to QST, domicile Australia, would you have
a copy of the article?

HH