Owen Duffy wrote:
Modelling suggests that the efficiency of such an antenna degrades quickly
for dipole lengths less than about 35% of a wavelength.

Walter Maxwell agrees. In "Reflections", he suggests the
minimum length for a dipole should be 3/8WL.
--
73, Cecil http://www.w5dxp.com
"According to the general theory of relativity,
space without ether is unthinkable." Albert Einstein