Nice topics Barry
just one small (nitpicking) remark on the wording in
3) Why does every feed line have an SWR of some value at some frequency?
Actually it's not the feedline that has an SWR 'of some value'.
The line has a characteristic impedance (see item 2) )
It's the (mismatched) load that is transformed into something else along the line, causing the SWR.
Also a fun topic : how can a capacitive load suddenly be measured as some inductive impedance elsewhere along the line ? ... call our friend Smith to help.
73,
Luc ON7DQ
