Hi All

G3KEV wrote:

2. A loading coil of the same inductance wound with 4mm litz wire
behaves differently. Because of the much higher Q  the slightest breeze
or some rain and it needs retuning to resonance, also sudden
fluctuations are not good for the FET pa.

This is true only if the ground loss (in ground point R + antenna-to-gnd return 
R)
is very low compared to the coil R. Consider the actual antenna Q which is 
lower,
and often MUCH lower in amateur antennas, than the loading coil Q.

73
Johan SM6LKM