Hi all, sorry for off topic.

since You are all(at least some of you) familiar with vpp and polar
diagram, i hope that u
can help me.
I need any material related to vpp and polar diagrams.
I already use Google but didn't get good results as i expect, so if
anyone have some free pdf tutorial with good description of vpp polar
diagram please send me via mail or post link where can i download them.

tnx in advance

P.S. sorry on bad english