Jim,
Yes, they are loading coils. Specifically 'where' they are in the
antenna is very variable, just depends on the particular user, what he
has available, etc, etc.
One thing you should be aware of is that translating between 'CB'
electronics and everyone else's electronics is not always easy! The
'CB' world has proven that all the 'acceptable' assumptions assumed by
the rest of the world are mistaken in at least some way. Obtaining an
acceptable translation is very "iffy". (Nicest way I can think of to
say it's mostly total B.S., sorry.)
Examples:
Wider coil windings (straps) radiate better because or larger surface
areas, than measly small wire.
Wide coil windings that are 'flat', horizontal, radiate in a
horizontal polarization.
Vertical strap coil windings radiate in a vertical polarization.
'Fat' antennas can radiate gazzilions of watts whereas 'smaller'
diameter antennas can't.
MY antenna is better than your antenna because I made that way.
.... I quit. Probably gonna make someone mad or something.
- 'Doc