[UK-CONTEST] Feeding your dipole?

[G3SVL]

The purpose of a balun is to enable you to feed a balanced load (dipole) 
with an unbalanced feeder (coax). But an 80m dipole a height most of us 
suburban dwellers is likely to get it is never going to be balanced due to 
proximity of the ground and other objects. Ergo the balun is unlikely to do 
what you think it will. Furthermore, the usual ferrite baluns don't like 
mismatches and IMO are rarely rated for use with a linear at much over 2:1 
SWR as seen at the point where the balun is placed.

For EMC, assuming it is feeder radiation, make a multi-turn coil of the 
coax, or fit a humungous quantity of ferrite beads over its outer - either 
of which will act as a choke at RF frequencies.

As you might have gathered, I've never owned a balun for anything below 20m 
(at which freq I might hope to get something approaching a balanced antenna).

73 de Chris G3SVL