I guess I'm not keeping up with technology! I know what induction is, but what are induction coils for antennas? I'm more familiar with loading coils, matching coils, choke coils and tuning coils. What is it that induction coils are suppose to do?
Added: After rereading your description of these induction coils, I think you are referring to baluns. Balun, a contraction of "balanced-unbalanced," are special transformers used to match unbalanced transmission line (e.g. coax) to balanced antennas (typically, dipoles). They can also be used to match balanced transmission line, so-called ladder line, to unbalanced antennas, such as your verticals. If you want to use coax with an unbalanced antenna, such as your vertical, the transformer is called an unun (for unbalanced-unbalanced).
The Cebik antenna site (www.cebik.com
) has a good discussion on baluns, ununs, and other antenna transformers, and a search of eHam should turn up various articles about their construction and use. You can also google the terms and find numerous more discussions. Jerry Sevick and Doug DeMaw have written books describing them, and there is also a good discussion in the ARRL Handbook and Antenna Book.
I hope I interpreted your question correctly. Good luck.