christofire wrote:
The 'loading coil' is distributed throughout the
radiating element and, consequently, throughout the current distribution so
it might be possible to reduce the I^2R loss using the normal-mode helix.

For a fixed length of loaded monopole, a high-Q
center-loading coil (or top-loading coil) will
result in greater efficiency. Helical elements
have been measured in numerous 75m shootouts to
be relatively low-Q and therefore lossier than,
e.g. Texas Bugcatcher Coils.
--
73, Cecil http://www.w5dxp.com